Home |
Search |
Today's Posts |
#1
Posted to rec.audio.pro, sci.electronics.equipment, rec.audio.tech,rec.radio.amateur.homebrew, sci.electronics.design
|
|||
|
|||
inexpensive analog audio pitch (frequency?) meter or schematic /plans for one?
I am looking for an inexpensive (hopefully $20 or less) analog meter
one with a moving needle like this http://en.wikipedia.org/wiki/Image:VU_Meter.jpg that I can plug my computer's sound card into (actually two meters, one for the right speaker, one for the left), that will read the pitch of the audio being played. I know that a given sound has a fundamental tone and overtones, and it would have to detect the fundemantal tone (like a guitar tuner). The audio source would be a MIDI program, so if necessary I could use samples of a very simple waveform (ie Sine, square, etc) if that would eliminate overtones and make pitch detection more accurate. Does anyone know if such a meter exists or where to find plans to build one? Thanks. |
#2
Posted to rec.audio.tech
|
|||
|
|||
inexpensive analog audio pitch (frequency?) meter or schematic / plans for one?
wrote in message
... I am looking for an inexpensive (hopefully $20 or less) analog meter one with a moving needle like this http://en.wikipedia.org/wiki/Image:VU_Meter.jpg that I can plug my computer's sound card into (actually two meters, one for the right speaker, one for the left), that will read the pitch of the audio being played. I know that a given sound has a fundamental tone and overtones, and it would have to detect the fundemantal tone (like a guitar tuner). The audio source would be a MIDI program, so if necessary I could use samples of a very simple waveform (ie Sine, square, etc) if that would eliminate overtones and make pitch detection more accurate. Does anyone know if such a meter exists or where to find plans to build one? Thanks. I don't know of an analogue meter that will do what you want, and certainly not for $20 as just the meters will cost double that each. However, there are lots of free software packages that include a FFT analyser from which you can measure the frequency of the fundamental and all the overtones. Look at http://audio.rightmark.org You can also get this information from the analyser built into CoolEdit (now Adobe Audition) and Audacity which has the benefit of being a multi-track recorder/editor plus analyser. http://audacity.sourceforge.net/ S. http://audiopages.googlepages.com |
#3
Posted to rec.audio.pro, sci.electronics.equipment, rec.audio.tech,rec.radio.amateur.homebrew, sci.electronics.design
|
|||
|
|||
inexpensive analog audio pitch (frequency?) meter or schematic /plans for one?
On Dec 31 2007, 10:43*am, wrote:
I am looking for an inexpensive (hopefully $20 or less) analog meter ... that will read the pitch of the audio being played. Phase-lock loops like 74HC4046 can lock onto an audio frequency, and the follower in it has an output voltage proportional to frequency. That's about $0.60 from your budget; a good analog moving-needle meter will suck up the rest of it. |
#4
Posted to rec.audio.pro,sci.electronics.equipment,rec.audio.tech,rec.radio.amateur.homebrew,sci.electronics.design
|
|||
|
|||
inexpensive analog audio pitch (frequency?) meter or schematic / plans for one?
You can buy digital (yes, I know you said you wanted analog) autotuners --
such as those from Sabine -- for around $30. |
#5
Posted to rec.audio.pro, sci.electronics.equipment, rec.audio.tech,rec.radio.amateur.homebrew, sci.electronics.design
|
|||
|
|||
inexpensive analog audio pitch (frequency?) meter or schematic /plans for one?
Thanks for your reply. I am not skilled in electronics - do you know
of any schematics I could follow to build one of these? On Jan 1, 11:39 pm, whit3rd wrote: On Dec 31 2007, 10:43 am, wrote: I am looking for an inexpensive (hopefully $20 or less) analog meter ... that will read the pitch of the audio being played. Phase-lock loops like 74HC4046 can lock onto an audio frequency, and the follower in it has an output voltage proportional to frequency. That's about $0.60 from your budget; a good analog moving-needle meter will suck up the rest of it. |
#6
Posted to rec.audio.pro,sci.electronics.equipment,rec.audio.tech,rec.radio.amateur.homebrew,sci.electronics.design
|
|||
|
|||
inexpensive analog audio pitch (frequency?) meter or schematic / plans for one?
wrote in message
... I am not skilled in electronics -- do you know of any schematics I could follow to build one of these? If you're not skilled in electronics, you're wasting your time. Buy a commercial unit and be done with it. |
#7
Posted to rec.audio.pro,sci.electronics.equipment,rec.audio.tech,rec.radio.amateur.homebrew,sci.electronics.design
|
|||
|
|||
inexpensive analog audio pitch (frequency?) meter or schematic / plans for one?
"William Sommerwerck" wrote in message
. .. wrote in message ... I am not skilled in electronics -- do you know of any schematics I could follow to build one of these? If you're not skilled in electronics, you're wasting your time. Buy a commercial unit and be done with it. Go to a music store (one that sells musical instruments) and ask for a tuning meter. Korg is a brand many stores carry. -- Dave M MasonDG44 at comcast dot net (Just substitute the appropriate characters in the address) "In theory, there isn't any difference between theory and practice. In practice, there is." - Yogi Berra |
#8
Posted to rec.audio.pro,sci.electronics.equipment,rec.audio.tech,rec.radio.amateur.homebrew,sci.electronics.design
|
|||
|
|||
inexpensive analog audio pitch (frequency?) meter or schematic / plans for one?
wrote ...
Thanks for your reply. I am not skilled in electronics - do you know of any schematics I could follow to build one of these? Maybe. What do you want to do with it? Can't answer it as a generic question. It seems absurd to even think about a "meter" for frequency when listening to most any kind of normal audio. (posted from: rec.audio.tech) |
#9
Posted to rec.audio.pro,sci.electronics.equipment,rec.audio.tech,rec.radio.amateur.homebrew,sci.electronics.design
|
|||
|
|||
inexpensive analog audio pitch (frequency?) meter or schematic / plans for one?
In fairness to the original poster... Once upon a time you could buy Heath
or Knight or EICO or other electronics kits, to save money, learn about electronics, or just have fun. Most currently available kits don't do much useful and are overpriced. |
#10
Posted to rec.audio.pro,sci.electronics.equipment,rec.audio.tech,rec.radio.amateur.homebrew,sci.electronics.design
|
|||
|
|||
inexpensive analog audio pitch (frequency?) meter or schematic / plans for one?
On Fri, 4 Jan 2008 18:28:52 -0500, the renowned "DaveM"
wrote: "William Sommerwerck" wrote in message ... wrote in message ... I am not skilled in electronics -- do you know of any schematics I could follow to build one of these? If you're not skilled in electronics, you're wasting your time. Buy a commercial unit and be done with it. Go to a music store (one that sells musical instruments) and ask for a tuning meter. Korg is a brand many stores carry. Lots (mostly digital with faux analog displays) to pick from for between $10 and $20. I just bought this one at a local music store for $15 or so, batteries included. http://www.amazon.com/KORG-GA30-Guit...9494627&sr=8-8 Best regards, Spehro Pefhany -- "it's the network..." "The Journey is the reward" Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com |
#11
Posted to rec.audio.pro,sci.electronics.equipment,rec.audio.tech,rec.radio.amateur.homebrew,sci.electronics.design
|
|||
|
|||
inexpensive analog audio pitch (frequency?) meter or schematic / plans for one?
"Spehro Pefhany" wrote
in message ... Lots (mostly digital with faux analog displays)... Good grief. One of those rare human beings who actually understands the difference between analog and digital. Congratulations! |
#13
Posted to rec.audio.pro,sci.electronics.equipment,rec.audio.tech,rec.radio.amateur.homebrew,sci.electronics.design
|
|||
|
|||
inexpensive analog audio pitch (frequency?) meter or schematic / plans for one?
|
#14
Posted to rec.audio.pro, sci.electronics.equipment, rec.audio.tech,rec.radio.amateur.homebrew, sci.electronics.design
|
|||
|
|||
inexpensive analog audio pitch (frequency?) meter or schematic /plans for one?
On Jan 5, 5:03 am, "William Sommerwerck"
wrote: wrote: I know that a given sound has a fundamental tone and overtones, and it would have to detect the fundemantal tone (like a guitar tuner). There's no need to "detect" the fundamental. The device would simply look for zero crossings, which are the same regardless of the presence or absence of harmonics. That need not be true. If you have a large high harmonic, you can have two zero crossings where one is expected. Only a little cleverness is needed to fix the problem. In fact, I'm reasonably (but not completely) sure a PLL would work with a non-sine signal. They do but you need to make sure that they sweep up to the frequency they are going to lock onto. Most PLL designs will happily lock onto a harmonic. |
#15
Posted to rec.audio.pro,sci.electronics.equipment,rec.audio.tech,rec.radio.amateur.homebrew,sci.electronics.design
|
|||
|
|||
inexpensive analog audio pitch (frequency?) meter or schematic /plans for one?
On Fri, 04 Jan 2008 17:31:10 -0800, William Sommerwerck wrote:
"Spehro Pefhany" wrote in message ... Lots (mostly digital with faux analog displays)... Good grief. One of those rare human beings who actually understands the difference between analog and digital. Congratulations! There are 10 kinds of people in the world: Those who understand binary, and those who don't. ;-) Rich |
#16
Posted to rec.audio.pro,sci.electronics.equipment,rec.audio.tech,rec.radio.amateur.homebrew,sci.electronics.design
|
|||
|
|||
inexpensive analog audio pitch (frequency?) meter or schematic / plans for one?
National Semi still makes a "frequency to voltage" converter chip, so does
Analog. But here's a link to using a PLL -- from National Semi -- Application Note 210 http://www.national.com/an/AN/AN-210.pdf |
#17
Posted to rec.audio.pro,sci.electronics.equipment,rec.audio.tech,rec.radio.amateur.homebrew,sci.electronics.design
|
|||
|
|||
inexpensive analog audio pitch (frequency?) meter or schematic / plans for one?
"jack" wrote in message
... National Semi still makes a "frequency to voltage" converter chip, so does Analog. But here's a link to using a PLL -- from National Semi -- Application Note 210 http://www.national.com/an/AN/AN-210.pdf This is fine, but what about the accuracy and resolution of the analog meter used to read the output? It still isn't clear why the OP is insisting on an analog display. |
#18
Posted to rec.audio.pro,sci.electronics.equipment,rec.audio.tech,rec.radio.amateur.homebrew,sci.electronics.design
|
|||
|
|||
inexpensive analog audio pitch (frequency?) meter or schematic / plans for one?
"jack" wrote ...
National Semi still makes a "frequency to voltage" converter chip, so does Analog. But here's a link to using a PLL -- from National Semi -- Application Note 210 http://www.national.com/an/AN/AN-210.pdf Note that publication is 29 years old and I don't think any of the mentioned ICs are still in production any more. |
#19
Posted to rec.audio.pro,sci.electronics.equipment,rec.audio.tech,rec.radio.amateur.homebrew,sci.electronics.design
|
|||
|
|||
inexpensive analog audio pitch (frequency?) meter or schematic/ plans for one?
Richard Crowley wrote:
"jack" wrote ... National Semi still makes a "frequency to voltage" converter chip, so does Analog. But here's a link to using a PLL -- from National Semi -- Application Note 210 http://www.national.com/an/AN/AN-210.pdf Note that publication is 29 years old and I don't think any of the mentioned ICs are still in production any more. Since when has that stopped real homebrewers? Ahh, I see a slew of cross- posted groups (reading from r.r.a.h) Michael |
#20
Posted to rec.audio.pro,sci.electronics.equipment,rec.audio.tech,rec.radio.amateur.homebrew,sci.electronics.design
|
|||
|
|||
inexpensive analog audio pitch (frequency?) meter or schematic / plans for one?
"msg" wrote ...
Richard Crowley wrote: "jack" wrote ... National Semi still makes a "frequency to voltage" converter chip, so does Analog. But here's a link to using a PLL -- from National Semi -- Application Note 210 http://www.national.com/an/AN/AN-210.pdf Note that publication is 29 years old and I don't think any of the mentioned ICs are still in production any more. Since when has that stopped real homebrewers? Ahh, I see a slew of cross- posted groups (reading from r.r.a.h) Don't get me wrong. I am working on a couple of projects that could use circuits like that, but they are simply not produciton-worthy anymore. :-( |
#21
Posted to rec.audio.pro, sci.electronics.equipment, rec.audio.tech,rec.radio.amateur.homebrew, sci.electronics.design
|
|||
|
|||
inexpensive analog audio pitch (frequency?) meter or schematic /plans for one?
Thanks to everyone for your replies. I just want to do analog metering
with moving needle meters. I am aware that to meter volume/frequency digitally, I can buy a mixer or tuner, or via computer with the appropriate software. The meters in question are from an old Radio Shack mixer (I'll have to find the model #, left it at home). No matter what the exact specs of the meters however, the basics of the circuit for metering volume or pitch/frequency should be the same. Thanks again. On Jan 6, 8:20 am, "William Sommerwerck" wrote: "jack" wrote in message ... National Semi still makes a "frequency to voltage" converter chip, so does Analog. But here's a link to using a PLL -- from National Semi -- Application Note 210 http://www.national.com/an/AN/AN-210.pdf This is fine, but what about the accuracy and resolution of the analog meter used to read the output? It still isn't clear why the OP is insisting on an analog display. |
#22
Posted to rec.audio.pro,sci.electronics.equipment,rec.audio.tech,rec.radio.amateur.homebrew,sci.electronics.design
|
|||
|
|||
inexpensive analog audio pitch (frequency?) meter or schematic / plans for one?
|
Reply |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
inexpensive analog audio pitch (frequency?) meter or schematic /plans for one? | Pro Audio | |||
SPARS Organizes "Project Analog" Plans Custom Quantegy Tape Run | Pro Audio | |||
Power output meter amp schematic. | Vacuum Tubes | |||
Newbe question: pitch and octave frequency ratio? | Tech | |||
FS: radio shack analog spl meter | Marketplace |