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#1
Posted to alt.music.mp3.hardware,rec.audio.pro,rec.audio.tech
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Which MP3 Recorder has the longest recording time?
Hey guys. I'm looking for an MP3 recorder, such as a digital voice
recorder, that has the longest possible recording time. Finding a device with enough memory to record a few days of material is not a problem. The problem is I can't find a device that will run for more then 22 hours without changing the batteries. For example: http://www.amazon.co.uk/Sony-ICDP520...0938&s r=8-14 The reason I'm going for an MP3 recorder over anything else is because I'm assuming it will have the longest recording time. A tape recorder for example has a motor that needs powering, whereas an MP3 recorder does not. If there are alternative recording devices that could give me an even longer recording time, then that would be perfect. Kind Regards, Matt |
#2
Posted to alt.music.mp3.hardware,rec.audio.pro,rec.audio.tech
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Which MP3 Recorder has the longest recording time?
Matt wrote:
Hey guys. I'm looking for an MP3 recorder, such as a digital voice recorder, that has the longest possible recording time. Finding a device with enough memory to record a few days of material is not a problem. The problem is I can't find a device that will run for more then 22 hours without changing the batteries. For example: http://www.amazon.co.uk/Sony-ICDP520...0938&s r=8-14 The reason I'm going for an MP3 recorder over anything else is because I'm assuming it will have the longest recording time. A tape recorder for example has a motor that needs powering, whereas an MP3 recorder does not. If there are alternative recording devices that could give me an even longer recording time, then that would be perfect. Kind Regards, Matt Just had a thought: if I get a device that has voice activated recording and has a battery life of, say, 36 hours; if it only spends half of its time recording and the standby time is ages, then that might be fine. How good is voice activated recording? Is it the sort of thing that would record any noise it detects, or does it tend to miss words out? Kind Regards, Matt |
#3
Posted to alt.music.mp3.hardware,rec.audio.pro,rec.audio.tech
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Which MP3 Recorder has the longest recording time?
On Sun, 06 Jan 2008 15:14:29 +0000, Matt
wrote: Hey guys. I'm looking for an MP3 recorder, such as a digital voice recorder, that has the longest possible recording time. Finding a device with enough memory to record a few days of material is not a problem. The problem is I can't find a device that will run for more then 22 hours without changing the batteries. For example: http://www.amazon.co.uk/Sony-ICDP520...0938&s r=8-14 The reason I'm going for an MP3 recorder over anything else is because I'm assuming it will have the longest recording time. A tape recorder for example has a motor that needs powering, whereas an MP3 recorder does not. If there are alternative recording devices that could give me an even longer recording time, then that would be perfect. Kind Regards, Matt Just had a thought: if I get a device that has voice activated recording and has a battery life of, say, 36 hours; if it only spends half of its time recording and the standby time is ages, then that might be fine. How good is voice activated recording? Is it the sort of thing that would record any noise it detects, or does it tend to miss words out? Can we cut straight to the post where you reveal just what you're trying to do? Better answers will ensue :-) |
#4
Posted to alt.music.mp3.hardware,rec.audio.pro,rec.audio.tech
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Which MP3 Recorder has the longest recording time?
Matt wrote:
Hey guys. I'm looking for an MP3 recorder, such as a digital voice recorder, that has the longest possible recording time. Finding a device with enough memory to record a few days of material is not a problem. The problem is I can't find a device that will run for more then 22 hours without changing the batteries. For example: http://www.amazon.co.uk/Sony-ICDP520...0938&s r=8-14 What is the application? Can you just use an external battery pack and be done with it? The reason I'm going for an MP3 recorder over anything else is because I'm assuming it will have the longest recording time. A tape recorder for example has a motor that needs powering, whereas an MP3 recorder does not. If there are alternative recording devices that could give me an even longer recording time, then that would be perfect. Sure, ask your local pro audio dealer for a logging recorder. Most of them are 19" rackmount, and record for a very very long time on some sort of digital media (or on tape for older machines). --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#5
Posted to alt.music.mp3.hardware,rec.audio.pro,rec.audio.tech
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Which MP3 Recorder has the longest recording time?
Matt writes:
Matt wrote: Hey guys. I'm looking for an MP3 recorder, such as a digital voice recorder, that has the longest possible recording time. Finding a device with enough memory to record a few days of material is not a problem. The problem is I can't find a device that will run for more then 22 hours without changing the batteries. For example: http://www.amazon.co.uk/Sony-ICDP520...0938&s r=8-14 The reason I'm going for an MP3 recorder over anything else is because I'm assuming it will have the longest recording time. A tape recorder for example has a motor that needs powering, whereas an MP3 recorder does not. If there are alternative recording devices that could give me an even longer recording time, then that would be perfect. Kind Regards, Matt Just had a thought: if I get a device that has voice activated recording and has a battery life of, say, 36 hours; if it only spends half of its time recording and the standby time is ages, then that might be fine. How good is voice activated recording? Is it the sort of thing that would record any noise it detects, or does it tend to miss words out? The power in such devices is consumed by the electronics/CPU while operating. Voice-activated recording requires at least part of that electronics to be operating continuously (whether you're recording or not) in order to run the recognition function, thus your battery life on such a device is likely to be less than a standard device. -- % Randy Yates % "So now it's getting late, %% Fuquay-Varina, NC % and those who hesitate %%% 919-577-9882 % got no one..." %%%% % 'Waterfall', *Face The Music*, ELO http://www.digitalsignallabs.com |
#6
Posted to alt.music.mp3.hardware,rec.audio.pro,rec.audio.tech
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Which MP3 Recorder has the longest recording time?
Matt wrote:
Just had a thought: if I get a device that has voice activated recording and has a battery life of, say, 36 hours; if it only spends half of its time recording and the standby time is ages, then that might be fine. How good is voice activated recording? Is it the sort of thing that would record any noise it detects, or does it tend to miss words out? If it doesn't have timecode, then you don't know when a given utterance was made. This makes it inadmissable in court for a lot of things. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#7
Posted to alt.music.mp3.hardware,rec.audio.pro,rec.audio.tech
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Which MP3 Recorder has the longest recording time?
Matt wrote:
Hey guys. I'm looking for an MP3 recorder, such as a digital voice recorder, that has the longest possible recording time. Finding a device with enough memory to record a few days of material is not a problem. The problem is I can't find a device that will run for more then 22 hours without changing the batteries. For example: http://www.amazon.co.uk/Sony-ICDP520...0938&s r=8-14 The reason I'm going for an MP3 recorder over anything else is because I'm assuming it will have the longest recording time. A tape recorder for example has a motor that needs powering, whereas an MP3 recorder does not. If there are alternative recording devices that could give me an even longer recording time, then that would be perfect. Kind Regards, Matt Would an external battery pack/ power supply be acceptable? If so, anything that uses a wallwart supply can be used indefinitely up to either its memory limit or the size of the external pack. You just need to match voltages & plug type/ polarity. Modifying the one you're on about to use an external pack with a couple of D cells in it would give you up to a week, maybe. It'd take a competent tech an hour or two to do the mod, if you can find one willing to do it. One problem you may suffer from is a built in limit on file size or recording length, which may vary from unit to unit. One with voice operation may increase battery life, as they only record (And make a new file) when there's something to record. Other than that, flash recorders are run a close second on battery life by the HD based units, but they're somewhat larger, with bigger built in batteries. -- Tciao for Now! John. |
#8
Posted to alt.music.mp3.hardware,rec.audio.pro,rec.audio.tech
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Which MP3 Recorder has the longest recording time?
Would an external battery pack/ power supply be acceptable?
I don't see why not. A wall outlet might be a problem, so where would I get an external battery pack from in the UK? If so, anything that uses a wallwart supply can be used indefinitely up to either its memory limit or the size of the external pack. What's a "wallwart supply"? Kind Regards, Matt |
#9
Posted to alt.music.mp3.hardware,rec.audio.pro,rec.audio.tech
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Which MP3 Recorder has the longest recording time?
What is the application? Can you just use an external battery pack and
be done with it? An external battery pack would be fine, I just need to know where I could get one from. Sure, ask your local pro audio dealer for a logging recorder. Most of them are 19" rackmount, and record for a very very long time on some sort of digital media (or on tape for older machines). --scott I can only find ones that run with tapes, are ones that run on digital media less common? Kind Regards, Matt |
#10
Posted to alt.music.mp3.hardware,rec.audio.pro,rec.audio.tech
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Which MP3 Recorder has the longest recording time?
"Matt" wrote ...
Would an external battery pack/ power supply be acceptable? I don't see why not. A wall outlet might be a problem, so where would I get an external battery pack from in the UK? If so, anything that uses a wallwart supply can be used indefinitely up to either its memory limit or the size of the external pack. What's a "wallwart supply"? It is a power cable with a "wart" or large "plug" which contains the mains power supply. It is intended to connect to the mains outlet. Since you won't reveal the application, are we to assume that it must be portable and self-powered? If you want to continue to play a game of 20-questions, your responses will be limited to those who also wish to play. |
#11
Posted to alt.music.mp3.hardware,rec.audio.pro,rec.audio.tech
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Which MP3 Recorder has the longest recording time?
"Matt" wrote ...
What is the application? Can you just use an external battery pack and be done with it? An external battery pack would be fine, I just need to know where I could get one from. Sure, ask your local pro audio dealer for a logging recorder. Most of them are 19" rackmount, and record for a very very long time on some sort of digital media (or on tape for older machines). --scott I can only find ones that run with tapes, are ones that run on digital media less common? There are quite common, but perhaps for different uses than your (unidentified) application They tend to be based on big arrays of hard drives, etc. For example... http://www.eventide.com/loggers/loggers.htm |
#12
Posted to alt.music.mp3.hardware, rec.audio.pro, rec.audio.tech
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Which MP3 Recorder has the longest recording time?
Since you won't reveal the application, are we to
assume that it must be portable and self-powered? If you want to continue to play a game of 20-questions, your responses will be limited to those who also wish to play. My apologies. The application is a set of lectures over a three day period that I will be unable to attend, so I want to leave the recorder going in my absence. Kind Regards, Matt |
#13
Posted to alt.music.mp3.hardware,rec.audio.pro,rec.audio.tech
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Which MP3 Recorder has the longest recording time?
Matt wrote:
Would an external battery pack/ power supply be acceptable? I don't see why not. A wall outlet might be a problem, so where would I get an external battery pack from in the UK? Maplin will sell you a wide variety of lead-acid battery packs in different voltages and capacities. You may have to make a cable up to go the the recorder. If so, anything that uses a wallwart supply can be used indefinitely up to either its memory limit or the size of the external pack. What's a "wallwart supply"? An "AC adaptor" with a transformer that hangs on the wall. Kind Regards, So how long are you going to do without explaining what your application is? Are you trying to be deliberately obscure? --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#14
Posted to alt.music.mp3.hardware,rec.audio.pro,rec.audio.tech
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Which MP3 Recorder has the longest recording time?
Matt wrote:
What is the application? Can you just use an external battery pack and be done with it? An external battery pack would be fine, I just need to know where I could get one from. What is the application? Sure, ask your local pro audio dealer for a logging recorder. Most of them are 19" rackmount, and record for a very very long time on some sort of digital media (or on tape for older machines). I can only find ones that run with tapes, are ones that run on digital media less common? No, the digital units are much more common these days. What is your application? --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#15
Posted to alt.music.mp3.hardware,rec.audio.pro,rec.audio.tech
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Which MP3 Recorder has the longest recording time?
Matt wrote:
Would an external battery pack/ power supply be acceptable? I don't see why not. A wall outlet might be a problem, so where would I get an external battery pack from in the UK? Maplins ( www.maplin.co.uk )or RS online ( www.rswww.com )with a bit of soldering is the way I'd do it. They'll sell you a battery holder, a box & all the other bits (Switch if wanted, fuse & holder, cable & plug) for under a tenner. Depending on the make of recorder, the makers may sell one. If you're not worried about how it looks, the battery holder, some wire & a plug to match the recorder power input will do it, insulated with tape. You could also try it with the Lithium disposable cells, which seem to offer a higher energy density than standard alkaline ones. These *may* solve your problem with the recorder as it comes out of the box. I've not tried them yet, so I don't know if they just have lower internal resistance for high drain applications or higher capacity. If so, anything that uses a wallwart supply can be used indefinitely up to either its memory limit or the size of the external pack. What's a "wallwart supply"? Sorry, it's a mains supply that plugs into a wall socket, looking a bit like an oversized wart.... -- Tciao for Now! John. |
#16
Posted to alt.music.mp3.hardware,rec.audio.pro,rec.audio.tech
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Which MP3 Recorder has the longest recording time?
Matt wrote:
Since you won't reveal the application, are we to assume that it must be portable and self-powered? If you want to continue to play a game of 20-questions, your responses will be limited to those who also wish to play. My apologies. The application is a set of lectures over a three day period that I will be unable to attend, so I want to leave the recorder going in my absence. Could you not ask someone to take a recorder in with them or ask the venue for a recording? I've got a recorder here that I bought from PC World that'll record for about 8 hours on a single AAA cell, using a 2 Gig SD card. It's about an inch long & half an inch wide, & is quite sensitive, with auto gain control. Either clip it to a lapel & sit at the front, or clip it to the lectern. Either way, it's unobtrusive. An obsolete type, but there are similar ones still on the market. -- Tciao for Now! John. |
#17
Posted to alt.music.mp3.hardware,rec.audio.pro,rec.audio.tech
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Which MP3 Recorder has the longest recording time?
On Sun, 06 Jan 2008 15:00:45 +0000 'Matt' wrote this on alt.music.mp3.hardwa The reason I'm going for an MP3 recorder over anything else is because I'm assuming it will have the longest recording time. A tape recorder for example has a motor that needs powering, whereas an MP3 recorder does not. If there are alternative recording devices that could give me an even longer recording time, then that would be perfect. I have a small shirt-pocket size voice recorder which runs for a long time on 2 small quickly replaceable AAA batteries. Sanyo model ICR-B32. Useful for covertly switching on when arrested by the police or to record other peoples' private conversations ;-) Cost me about 25 pounds sterling several years ago... |
#18
Posted to alt.music.mp3.hardware,rec.audio.pro,rec.audio.tech
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Which MP3 Recorder has the longest recording time?
On Sun, 6 Jan 2008 07:55:57 -0800 (PST), Matt
wrote: My apologies. The application is a set of lectures over a three day period that I will be unable to attend, so I want to leave the recorder going in my absence. Can't one of the other attendees record them for you? If they all hate you so much that no-one will, equipment you set up is going to be sabotaged (or stolen) anyway :-) |
#19
Posted to alt.music.mp3.hardware,rec.audio.pro,rec.audio.tech
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Which MP3 Recorder has the longest recording time?
Can't one of the other attendees record them for you? If they all
hate you so much that no-one will, equipment you set up is going to be sabotaged (or stolen) anyway :-) I've never met any of the other attendees, so I'd rather take care of it myself Kind Regards, Matt |
#20
Posted to alt.music.mp3.hardware, rec.audio.pro, rec.audio.tech
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Which MP3 Recorder has the longest recording time?
On Jan 6, 10:00 am, Matt wrote:
Hey guys. I'm looking for an MP3 recorder, such as a digital voice recorder, that has the longest possible recording time. Finding a device with enough memory to record a few days of material is not a problem. The problem is I can't find a device that will run for more then 22 hours without changing the batteries. In that case, look for one with an external power jack and power it from an AC supply or a larger battery pack. But when you start to get upwards of 20 hours on a reasonably sized memory card, you start to make some pretty big compromises in quality because of the low sample rate and high data compression. As to where to buy a battery pack, this depends on the power requirements of the recorder. Most of us around here in rec.audio.pro are pretty resourceful and would just make our own. If you can't do that, there are probably places that will do it for you, perhaps even a local electronics repair shop. There's not much to it, you just need the proper connector and the right size batteries. It can be as pretty or as ugly as you want it. |
#21
Posted to alt.music.mp3.hardware, rec.audio.pro, rec.audio.tech
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Which MP3 Recorder has the longest recording time?
On Jan 6, 10:55 am, Matt wrote:
My apologies. The application is a set of lectures over a three day period that I will be unable to attend, so I want to leave the recorder going in my absence. Why don't you just find someone who will be attending the lectures you want to record, hand him your recorder, and ask him to record them for you? Take him to lunch for his trouble. Have you checked to see if the organization sponsoring the lectures is recording the program? It's pretty common these days. |
#22
Posted to alt.music.mp3.hardware,rec.audio.pro,rec.audio.tech
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Which MP3 Recorder has the longest recording time?
On Sun, 06 Jan 2008 15:00:45 +0000, Matt wrote:
Hey guys. I'm looking for an MP3 recorder, such as a digital voice recorder, that has the longest possible recording time. Finding a device with enough memory to record a few days of material is not a problem. The problem is I can't find a device that will run for more then 22 hours without changing the batteries. For example: http://www.amazon.co.uk/Sony-ICDP520...0938&s r=8-14 The reason I'm going for an MP3 recorder over anything else is because I'm assuming it will have the longest recording time. A tape recorder for example has a motor that needs powering, whereas an MP3 recorder does not. If there are alternative recording devices that could give me an even longer recording time, then that would be perfect. What are the portability requirements? Exactly how much run time do you need? At what quality level? Connect an external battery to a hard drive mp3 player with record capability and you should be able to record a full month. |
#23
Posted to alt.music.mp3.hardware,rec.audio.pro,rec.audio.tech
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Which MP3 Recorder has the longest recording time?
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#24
Posted to alt.music.mp3.hardware,rec.audio.pro,rec.audio.tech
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Which MP3 Recorder has the longest recording time?
Matt wrote:
Since you won't reveal the application, are we to assume that it must be portable and self-powered? If you want to continue to play a game of 20-questions, your responses will be limited to those who also wish to play. My apologies. The application is a set of lectures over a three day period that I will be unable to attend, so I want to leave the recorder going in my absence. Get a Zoom H2 and an 8GB SD card. Get someone to push Record and Stop each day. geoff |
#25
Posted to alt.music.mp3.hardware,rec.audio.pro,rec.audio.tech
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Which MP3 Recorder has the longest recording time?
geoff wrote:
Matt wrote: Since you won't reveal the application, are we to assume that it must be portable and self-powered? If you want to continue to play a game of 20-questions, your responses will be limited to those who also wish to play. My apologies. The application is a set of lectures over a three day period that I will be unable to attend, so I want to leave the recorder going in my absence. Get a Zoom H2 and an 8GB SD card. Get someone to push Record and Stop each day. Nice though it is, 4 hours recording pretty much kills the batteries on one of those. It uses a standard 9 volt wallwart, though, so an external pack shouldn't be too hard to make. Plan B, which is to run it off a USB supply as an independent recorder, doesn't work. It had to be either the internal pencells or a 9 volt supply. Drat. Your best & easiest bet will probably be to either have a word with the lecturer or the venue beforehand. Most lecturers I've met have been quite co-operative about either recording or printed notes. -- Tciao for Now! John. |
#26
Posted to alt.music.mp3.hardware,rec.audio.pro,rec.audio.tech
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Which MP3 Recorder has the longest recording time?
John Williamson wrote:
Your best & easiest bet will probably be to either have a word with the lecturer or the venue beforehand. Most lecturers I've met have been quite co-operative about either recording or printed notes. On the other hand, they might get all defensive and coy regarding potential copyright and boot-legging. Not as much as is you did the recording without clearing with them first though ! On the other hand, they might be very happy to go out of their way to oblidge (by way of mains power, optimal mic siting, etc) if you can offer a set of the resultant recording for THEM to use .... geoff |
#27
Posted to alt.music.mp3.hardware,rec.audio.pro,rec.audio.tech
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Which MP3 Recorder has the longest recording time?
"Matt" wrote in message
Hey guys. I'm looking for an MP3 recorder, such as a digital voice recorder, that has the longest possible recording time. Finding a device with enough memory to record a few days of material is not a problem. The problem is I can't find a device that will run for more then 22 hours without changing the batteries. All you need then is a device that will work off of an external battery pack. I'm sure they abound. For example, any device that receives power via a USB cable can be used with relatively inexpenisve battery packs like this one: http://i4.peapod.com/c/GB/GBFLX.jpg |
#28
Posted to alt.music.mp3.hardware, rec.audio.pro, rec.audio.tech
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Which MP3 Recorder has the longest recording time?
As to where to buy a battery pack, this depends on the power
requirements of the recorder. Most of us around here in rec.audio.pro are pretty resourceful and would just make our own. If you can't do that, there are probably places that will do it for you, perhaps even a local electronics repair shop. There's not much to it, you just need the proper connector and the right size batteries. It can be as pretty or as ugly as you want it. Sadly I'm not too resourceful In terms of power requirements, I have a small MP3 player at the moment (which I've left recording so I can check its battery life) which runs on a single AAA battery. Also I'm rather lacking in electronics shops near me. Is this something I could buy ready made? Kind Regards, Matt |
#29
Posted to alt.music.mp3.hardware, rec.audio.pro, rec.audio.tech
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Which MP3 Recorder has the longest recording time?
What are the portability requirements? *Exactly how much run time
do you need? *At what quality level? * Portability would be very useful. Run time I need as much as I can get, but about 3 days minimum. The recording is only voice, so I could put up with a low quality (by low I mean something like telephone quality) recording in this case. Connect an externalbatteryto a hard drive mp3 player with record capability and you should be able to record a full month. Where would I be able to get an external battery from? Kind Regards, Matt |
#30
Posted to alt.music.mp3.hardware,rec.audio.pro,rec.audio.tech
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Which MP3 Recorder has the longest recording time?
Matt wrote:
What are the portability requirements? Exactly how much run time do you need? At what quality level? Portability would be very useful. Run time I need as much as I can get, but about 3 days minimum. The recording is only voice, so I could put up with a low quality (by low I mean something like telephone quality) recording in this case. Connect an externalbatteryto a hard drive mp3 player with record capability and you should be able to record a full month. Where would I be able to get an external battery from? Practically any electronics hobby shop. Check the Yellow Pages, or online. A 'hard drive' mp3 recorder will still use too much power. A Zoom H2 would need a 9V battery pack or mains PSU, and a suiatble plug. Time to GET resourceful. geoff |
#31
Posted to alt.music.mp3.hardware,rec.audio.pro,rec.audio.tech
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Which MP3 Recorder has the longest recording time?
"geoff" wrote ...
Matt wrote: What are the portability requirements? Exactly how much run time do you need? At what quality level? Portability would be very useful. Run time I need as much as I can get, but about 3 days minimum. The recording is only voice, so I could put up with a low quality (by low I mean something like telephone quality) recording in this case. Connect an externalbatteryto a hard drive mp3 player with record capability and you should be able to record a full month. Where would I be able to get an external battery from? Practically any electronics hobby shop. Check the Yellow Pages, or online. A 'hard drive' mp3 recorder will still use too much power. A Zoom H2 would need a 9V battery pack or mains PSU, and a suiatble plug. Time to GET resourceful. Dunno where the OP thinks he can deploy this long-running gadget for three days unattended with a bunch of strangers? |
#32
Posted to alt.music.mp3.hardware, rec.audio.pro, rec.audio.tech
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Which MP3 Recorder has the longest recording time?
On Jan 6, 9:46 pm, Matt wrote:
Where would I be able to get an external battery from? This is kind of a chicken-and-egg thing. If you really want to do this, assume that: 1 - There will be no off-the-shelf battery pack available and 2 - When you have the recorder in hand, you will be able to find someone to build a battery pack for you capable of any capacity that you want So pick out a recorder that offers the capacity you need at the quality that you can tolerate. I'd suggest making some test recordings using the settings that tive the smallest file size before buying. Then come back here stating your location ("UK" is too general if you don't know where your local electronics repair shop is) and I'm sure someone will have a good suggestion. |
#33
Posted to alt.music.mp3.hardware, rec.audio.pro, rec.audio.tech
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Which MP3 Recorder has the longest recording time?
2 - When you have the recorder in hand, you will be able to find
someone to build a battery pack for you capable of any capacity that you want So pick out a recorder that offers the capacity you need at the quality that you can tolerate. I'd suggest making some test recordings using the settings that tive the smallest file size before buying. Then come back here stating your location ("UK" is too general if you don't know where your local electronics repair shop is) and I'm sure someone will have a good suggestion. I have one already that I've used in the past. It's a small 1GB Medion MP3 player (MD80527 is the model number) that can record in 8 bit 32kb/ sec .wav format. It takes a single AAA battery. I set it recording yesterday to test its battery life, and so far from a fresh battery I've just gone past the 24 hour mark. The batter indicator has an almost empty display, so it's not got long left. I'm in Cheshire in the UK (just south of the Manchester area) if that is of any help. Kind Regards, Matt |
#34
Posted to alt.music.mp3.hardware,rec.audio.pro,rec.audio.tech
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Which MP3 Recorder has the longest recording time?
Matt wrote:
I'm in Cheshire in the UK (just south of the Manchester area) if that is of any help. Not a recommendation, as I've not used them, but Peter Martin in Congleton should be able to help you. Failing that, I've used Meigh's Television in Hanley before. The number's in the book, or e-mail me for details. Very helpful & reasonably priced. All they need to do is to solder a pair of wires to the battery contacts & run them out to a single D cell battery holder. Reversible & only slight damage to the battery cover if they do it right. That should give you about a week. :-) -- Tciao for Now! John. |
#35
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Which MP3 Recorder has the longest recording time?
On Mon, 7 Jan 2008 16:47:17 +1300, geoff wrote:
Matt wrote: What are the portability requirements? Exactly how much run time do you need? At what quality level? Portability would be very useful. Run time I need as much as I can get, but about 3 days minimum. The recording is only voice, so I could put up with a low quality (by low I mean something like telephone quality) recording in this case. Connect an externalbatteryto a hard drive mp3 player with record capability and you should be able to record a full month. Where would I be able to get an external battery from? Practically any electronics hobby shop. Check the Yellow Pages, or online. A 'hard drive' mp3 recorder will still use too much power. A Zoom H2 would they only spin up the hard drive every ten minutes or so, less frequently for lower bitrates. need a 9V battery pack or mains PSU, and a suiatble plug. Time to GET resourceful. geoff |
#36
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Which MP3 Recorder has the longest recording time?
On Mon, 07 Jan 2008 16:31:51 +0100, Chel van Gennip wrote:
Mike Rivers wrote: On Jan 6, 9:46 pm, Matt wrote: Where would I be able to get an external battery from? This is kind of a chicken-and-egg thing. If you really want to do this, assume that: 1 - There will be no off-the-shelf battery pack available and 2 - When you have the recorder in hand, you will be able to find someone to build a battery pack for you capable of any capacity that you want My Microtrack 24/96 is powered through the USB connection. It should not be to hard to find a battery pack for that. I've tested with a battery pack with 4AA NiMh cells, and I get over 12 hours recording time, but that was tested with phantom power on. Without phantom power it will be much more. Now that we know that it is a lecture series to be recorded, it is probably safe to assume that if the speaker isn't on drugs or tag-teaming, they won't be talking nonstop for the entire period. When the speaker stops to return home and get some sleep or the tag-team gives the audience a chance to do the same, replace the batteries with fresh ones or recharge them. |
#37
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Which MP3 Recorder has the longest recording time?
"AZ Nomad" wrote ...
Now that we know that it is a lecture series to be recorded, it is probably safe to assume that if the speaker isn't on drugs or tag-teaming, they won't be talking nonstop for the entire period. When the speaker stops to return home and get some sleep or the tag-team gives the audience a chance to do the same, replace the batteries with fresh ones or recharge them. The OP won't be present to change the batteries or to turn it on/off. (aaparently for the entire three days). However, that begs the question of where he can put this recorder and extra battery lash-up that will adequately pick up thte lecturer without being stolen while sitting there, unattended, for three days. For that matter, this strange electronic-looking device with some external batteries lashed to it may look sufficiently like an IED (improvised explosive device, i.e. a "bomb") that it may be hauled away by the bomb squad with lights and sirens. Even if the OP were there, recording a lecture from the audience is a dubious exercise, unless one has very low expecations of quality. If it were me, I would engage a proxy who will be in attendance to do it for me. Trying to do this passively seems very doubtful to me. |
#38
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Which MP3 Recorder has the longest recording time?
On Jan 7, 10:00 am, Matt wrote:
I have one already that I've used in the past. It's a small 1GB Medion MP3 player (MD80527 is the model number) that can record in 8 bit 32kb/ sec .wav format. It takes a single AAA battery. This is where you'll need to find someone creative. Generally devices that run off a single cell like that don't have provisions built in for external power. I have a Raven MP3 player that looks like a USB "thumb" memory drive and runs off a AAA battery. I can load and unload files under USB power (without the battery) but it needs the battery to play. If I wanted to run it from external power, I'd build a "dummy" battery to fit the battery holder, make contact with the springs at the ends, and attach leads to it to which I'd connect an external battery with greater capacity. I set it recording yesterday to test its battery life, and so far from a fresh battery I've just gone past the 24 hour mark. A D cell has 12 times the amp-hour capacity of a AAA, so you should be able to power it for a week with a single D cell. As someone pointed out, there may be a problem with the recorded file growing to a greater size than the player (or even a computer's file system) can handle. Most devices deal with this in one way or another. Some just stop when the file reaches the maximum size, others close that file, open a new one, and continue recording. You should cobble something up with clip leads, a D cell, and maybe some duct tape and see what happens when you let it record for three days. Once you know how to make it work, you look for a craftsman to make it look pretty. Or you can leave it with the clip leads and duct tape, but be sure the people in the lecture room know it's not a bomb. |
#39
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Which MP3 Recorder has the longest recording time?
Mike Rivers wrote:
On Jan 7, 10:00 am, Matt wrote: I have one already that I've used in the past. It's a small 1GB Medion MP3 player (MD80527 is the model number) that can record in 8 bit 32kb/ sec .wav format. It takes a single AAA battery. This is where you'll need to find someone creative. Generally devices that run off a single cell like that don't have provisions built in for external power. I have a Raven MP3 player that looks like a USB "thumb" memory drive and runs off a AAA battery. I can load and unload files under USB power (without the battery) but it needs the battery to play. If I wanted to run it from external power, I'd build a "dummy" battery to fit the battery holder, make contact with the springs at the ends, and attach leads to it to which I'd connect an external battery with greater capacity. I set it recording yesterday to test its battery life, and so far from a fresh battery I've just gone past the 24 hour mark. A D cell has 12 times the amp-hour capacity of a AAA, so you should be able to power it for a week with a single D cell. As someone pointed out, there may be a problem with the recorded file growing to a greater size than the player (or even a computer's file system) can handle. Most devices deal with this in one way or another. Some just stop when the file reaches the maximum size, others close that file, open a new one, and continue recording. My recording I started going yesterday stopped a few minutes ago. There was still enough battery life left to keep the screen going (though would it stop if there wasn't enough to keep the recording going?), and another 26 hours of memory remaining. Sadly it didn't start a new file either. The file was just over 24 and a half hours long, and is 336MB in size. There is a lower quality setting (I think it's 8kb/sec) which I expect should still be better then nothing, so I'll give that a try. I'm assuming the restriction is likely to be on the size of the file, rather then the length of the recording? You should cobble something up with clip leads, a D cell, and maybe some duct tape and see what happens when you let it record for three days. Once you know how to make it work, you look for a craftsman to make it look pretty. Or you can leave it with the clip leads and duct tape, but be sure the people in the lecture room know it's not a bomb. I take it the current from a D cell is the same as that from a AAA since they are both 1.5V cells? I want to avoid any possible damage to the MP3 player. As an aside I've had a thought. By turning down the contrast on the small LCD screen to as low as possible and making sure the backlight doesn't come on for a brief few seconds at the start of the recording, can I expect much of an improvement in battery life? Kind Regards, Matt |
#40
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Which MP3 Recorder has the longest recording time?
There is a lower quality setting (I think it's 8kb/sec) which I expect
should still be better then nothing, so I'll give that a try. I'm assuming the restriction is likely to be on the size of the file, rather then the length of the recording? This lower quality setting is 8kb/sec, but is in ACT format, which appears to take up a lot more memory (ACT gives me only 35 hours whereas I get nearly 73 hours with 32kb/sec WAV). Kind Regards, Matt |
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