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#1
Posted to rec.audio.pro
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Input Level Control
Using Adobe Audition 1.5 on Windows XP with a Delta 1010LT card, is there a way
to adjust the track input level *in software*? I have a preamp with no level control that I want to record direct in. The output is too hot. |
#2
Posted to rec.audio.pro
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Input Level Control
mcp6453 wrote:
Using Adobe Audition 1.5 on Windows XP with a Delta 1010LT card, is there a way to adjust the track input level *in software*? I have a preamp with no level control that I want to record direct in. The output is too hot. There is a "digital pot" controlled by the volume control widget for Windows. It will not behave as a trim control per se. I expect it is post-A/D. http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/app_vol_ctrl.mspx?mfr=true -- Les Cargill |
#3
Posted to rec.audio.pro
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Input Level Control
On Jan 31, 12:32*pm, mcp6453 wrote:
Using Adobe Audition 1.5 on Windows XP with a Delta 1010LT card, is there a way to adjust the track input level *in software*? I have a preamp with no level control that I want to record direct in. The output is too hot. Use an attenuator between the preamp and the Delta. Peace, Paul |
#4
Posted to rec.audio.pro
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Input Level Control
On 1/31/2011 1:57 PM, PStamler wrote:
On Jan 31, 12:32 pm, mcp6453 wrote: Using Adobe Audition 1.5 on Windows XP with a Delta 1010LT card, is there a way to adjust the track input level *in software*? I have a preamp with no level control that I want to record direct in. The output is too hot. Use an attenuator between the preamp and the Delta. That's not a *software* solution. |
#5
Posted to rec.audio.pro
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Input Level Control
"mcp6453" wrote in message
Using Adobe Audition 1.5 on Windows XP with a Delta 1010LT card, is there a way to adjust the track input level *in software*? I have a preamp with no level control that I want to record direct in. The output is too hot. I presume that you are having problems with the 1010LT inputs clipping. Very few production grade audio interfaces have analog domain input attenuators, however some of them like the 1010LT do have on-board jumpers that let you select -10 or +4 sensitivity. The +4 setting can help in many cases like yours. One of the problems is that the performance of programmable analog attenuators has not kept up with the performance of ADCs. |
#6
Posted to rec.audio.pro
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Input Level Control
On 1/31/2011 4:03 PM, Arny Krueger wrote:
"mcp6453" wrote in message Using Adobe Audition 1.5 on Windows XP with a Delta 1010LT card, is there a way to adjust the track input level *in software*? I have a preamp with no level control that I want to record direct in. The output is too hot. I presume that you are having problems with the 1010LT inputs clipping. Very few production grade audio interfaces have analog domain input attenuators, however some of them like the 1010LT do have on-board jumpers that let you select -10 or +4 sensitivity. The +4 setting can help in many cases like yours. One of the problems is that the performance of programmable analog attenuators has not kept up with the performance of ADCs. The preamps are not clipping, but they're too close to the edge. The card is already set for +4. What I don't understand is why Audition or Audacity doesn't have input level controls. |
#7
Posted to rec.audio.pro
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Input Level Control
In article ,
mcp6453 wrote: On 1/31/2011 4:03 PM, Arny Krueger wrote: "mcp6453" wrote in message Using Adobe Audition 1.5 on Windows XP with a Delta 1010LT card, is there a way to adjust the track input level *in software*? I have a preamp with no level control that I want to record direct in. The output is too hot. I presume that you are having problems with the 1010LT inputs clipping. Very few production grade audio interfaces have analog domain input attenuators, however some of them like the 1010LT do have on-board jumpers that let you select -10 or +4 sensitivity. The +4 setting can help in many cases like yours. One of the problems is that the performance of programmable analog attenuators has not kept up with the performance of ADCs. The preamps are not clipping, but they're too close to the edge. The card is already set for +4. What I don't understand is why Audition or Audacity doesn't have input level controls. Because the card probably has nothing in the analogue side to reduce levels. And reducing the levels on the digital side is not useful since the clipping has already occurred. Get some S15 attenuator pads and keep them around, they are for just this sort of occasion. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#8
Posted to rec.audio.pro
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Input Level Control
On 1/31/2011 4:14 PM, Scott Dorsey wrote:
Because the card probably has nothing in the analogue side to reduce levels. And reducing the levels on the digital side is not useful since the clipping has already occurred. Get some S15 attenuator pads and keep them around, they are for just this sort of occasion. What are S15 attenuator pads? |
#9
Posted to rec.audio.pro
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Input Level Control
On 31 Jan 2011, mcp6453 wrote in rec.audio.pro:
Using Adobe Audition 1.5 on Windows XP with a Delta 1010LT card, is there a way to adjust the track input level *in software*? I have a preamp with no level control that I want to record direct in. The output is too hot. I use an M-Audio AP2496 and I've been told that the drivers for the 1010 are similar. If so, the Delta drivers should have installed the M- Audio Control Panel in Windows Control Panel. There are volume/gain sliders in there. |
#10
Posted to rec.audio.pro
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Input Level Control
In article ,
mcp6453 wrote: On 1/31/2011 4:14 PM, Scott Dorsey wrote: Because the card probably has nothing in the analogue side to reduce levels. And reducing the levels on the digital side is not useful since the clipping has already occurred. Get some S15 attenuator pads and keep them around, they are for just this sort of occasion. What are S15 attenuator pads? Arrgh... not the S15, that's the stand. Shure part A15AS, in-line attenuator. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#11
Posted to rec.audio.pro
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Input Level Control
"mcp6453" wrote in message
On 1/31/2011 4:03 PM, Arny Krueger wrote: "mcp6453" wrote in message Using Adobe Audition 1.5 on Windows XP with a Delta 1010LT card, is there a way to adjust the track input level *in software*? I have a preamp with no level control that I want to record direct in. The output is too hot. I presume that you are having problems with the 1010LT inputs clipping. Very few production grade audio interfaces have analog domain input attenuators, however some of them like the 1010LT do have on-board jumpers that let you select -10 or +4 sensitivity. The +4 setting can help in many cases like yours. One of the problems is that the performance of programmable analog attenuators has not kept up with the performance of ADCs. The preamps are not clipping, but they're too close to the edge. The card is already set for +4. What I don't understand is why Audition or Audacity doesn't have input level controls. The answer is that they follow the usual standard of simply recording what the audio interface sends to them. |
#12
Posted to rec.audio.pro
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Input Level Control
"Scott Dorsey" wrote in message
In article , mcp6453 wrote: On 1/31/2011 4:14 PM, Scott Dorsey wrote: Because the card probably has nothing in the analogue side to reduce levels. And reducing the levels on the digital side is not useful since the clipping has already occurred. Get some S15 attenuator pads and keep them around, they are for just this sort of occasion. What are S15 attenuator pads? Arrgh... not the S15, that's the stand. Shure part A15AS, in-line attenuator. --scott Audio Technica, Proco, and I believe Hosa also have fixed and variable attenuators. They have XLR connectors and are at such impedance levels that they can work with mics and most pro gear. |
#13
Posted to rec.audio.pro
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Input Level Control
mcp6453 wrote:
On 1/31/2011 4:03 PM, Arny Krueger wrote: wrote in message Using Adobe Audition 1.5 on Windows XP with a Delta 1010LT card, is there a way to adjust the track input level *in software*? I have a preamp with no level control that I want to record direct in. The output is too hot. I presume that you are having problems with the 1010LT inputs clipping. Very few production grade audio interfaces have analog domain input attenuators, however some of them like the 1010LT do have on-board jumpers that let you select -10 or +4 sensitivity. The +4 setting can help in many cases like yours. One of the problems is that the performance of programmable analog attenuators has not kept up with the performance of ADCs. The preamps are not clipping, but they're too close to the edge. The card is already set for +4. What I don't understand is why Audition or Audacity doesn't have input level controls. It's off scope for Audition of Audacity. Software cannot fix gain staging errors between the preamp and soundcard. -- Les Cargill |
#14
Posted to rec.audio.pro
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Input Level Control
On 1/31/2011 1:32 PM, mcp6453 wrote:
Using Adobe Audition 1.5 on Windows XP with a Delta 1010LT card, is there a way to adjust the track input level *in software*? I have a preamp with no level control that I want to record direct in. The output is too hot. OK, fess up. What preamp has no level control? Not even input gain? You can always reduce the output level with that, unless you're trying to drive it to saturation. Have you checked the control panel for the Delta? Many interfaces in that range have a "+4/-10" input level switch controlled in software. If you find it, make sure it's set to +4. -- "Today's production equipment is IT based and cannot be operated without a passing knowledge of computing, although it seems that it can be operated without a passing knowledge of audio." - John Watkinson http://mikeriversaudio.wordpress.com - useful and interesting audio stuff |
#15
Posted to rec.audio.pro
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Input Level Control
On 1/31/2011 4:08 PM, mcp6453 wrote:
The preamps are not clipping, but they're too close to the edge. The card is already set for +4. What I don't understand is why Audition or Audacity doesn't have input level controls. Because they don't work right when implemented in software on the digital side of the A/D converter. You can reduce the level but that won't fix clipping of the input stage or the converter (if the input goes directly to the converter). It only serves to reduce the numerical resolution of the converter output. They could put a digitally controlled attenuator between the input jack and the input of the A/D converter but they don't because it might introduce a dB or two of noise (down at the -100 dBu level) and that would mean that the spec sheet, if honest, would have a higher noise floor than the competition. Marketing departments won't let them do that even if Engineering tells them that it will work better. -- "Today's production equipment is IT based and cannot be operated without a passing knowledge of computing, although it seems that it can be operated without a passing knowledge of audio." - John Watkinson http://mikeriversaudio.wordpress.com - useful and interesting audio stuff |
#16
Posted to rec.audio.pro
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Input Level Control
"Mike Rivers" wrote in message
They could put a digitally controlled attenuator between the input jack and the input of the A/D converter but they don't because it might introduce a dB or two of noise (down at the -100 dBu level) and that would mean that the spec sheet, if honest, would have a higher noise floor than the competition. Marketing departments won't let them do that even if Engineering tells them that it will work better. AFAIK the best digitally controlled analog attenuator ever commercialized was the CS 3310. Its residual noise was just about exactly 100 dB down. So your example is pretty much real world. Here's a tech analysis of the CS 3310 versus the common resistor ladder alternative: http://www.jeffrowland.com/Technolog...meControls.htm The last audio interface I ever saw with a CS 3310 in it was the legendary (ISA) Turtle Beach Fiji/Pinnacle which was limited to 16 bits. |
#17
Posted to rec.audio.pro
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Input Level Control
On Jan 31, 2:15*pm, mcp6453 wrote:
On 1/31/2011 1:57 PM, PStamler wrote: On Jan 31, 12:32 pm, mcp6453 wrote: Using Adobe Audition 1.5 on Windows XP with a Delta 1010LT card, is there a way to adjust the track input level *in software*? I have a preamp with no level control that I want to record direct in. The output is too hot. Use an attenuator between the preamp and the Delta. That's not a *software* solution. It's not a software solution because there is no software solution. But it's a solution that will work. Peace, Paul |
#18
Posted to rec.audio.pro
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Input Level Control
On 1/31/2011 5:27 PM, Mike Rivers wrote:
On 1/31/2011 1:32 PM, mcp6453 wrote: Using Adobe Audition 1.5 on Windows XP with a Delta 1010LT card, is there a way to adjust the track input level *in software*? I have a preamp with no level control that I want to record direct in. The output is too hot. OK, fess up. What preamp has no level control? Not even input gain? You can always reduce the output level with that, unless you're trying to drive it to saturation. Have you checked the control panel for the Delta? Many interfaces in that range have a "+4/-10" input level switch controlled in software. If you find it, make sure it's set to +4. It was set to "Consumer" even though I thought I had set it correctly. Problem solved. The preamp is homemade. |
#19
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Input Level Control
On 1/31/2011 7:46 PM, mcp6453 wrote:
It was set to "Consumer" even though I thought I had set it correctly. Problem solved. The preamp is homemade. Well, the next time you make one, put a gain or output level control on it and you can solve any "too hot" level problem. -- "Today's production equipment is IT based and cannot be operated without a passing knowledge of computing, although it seems that it can be operated without a passing knowledge of audio." - John Watkinson http://mikeriversaudio.wordpress.com - useful and interesting audio stuff |
#20
Posted to rec.audio.pro
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Input Level Control
On 1/31/2011 9:45 PM, Mike Rivers wrote:
On 1/31/2011 7:46 PM, mcp6453 wrote: It was set to "Consumer" even though I thought I had set it correctly. Problem solved. The preamp is homemade. Well, the next time you make one, put a gain or output level control on it and you can solve any "too hot" level problem. I don't plan to ever again make another one. It's possible that I'm going to build a passive mix-minus switcher with attenuator, but I have made my last printed circuit board, I hope. As I have posted here, I don't even like making cables any more. |
#21
Posted to rec.audio.pro
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Input Level Control
mcp6453 wrote:
It was set to "Consumer" even though I thought I had set it correctly. Problem solved. The preamp is homemade. Add a gain control to the preamp, then, and be done with it. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
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