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Old 4th October 2003, 09:43 AM   #1
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Default volume control

a simple question


is there a way to control the volume of 2 audio signals with a single pot ?
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Old 4th October 2003, 09:53 AM   #2
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Default Simple answer

VCA
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Old 4th October 2003, 09:58 AM   #3
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whats that?
i'm not looking digital or some other chip based ones
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Old 4th October 2003, 10:22 AM   #4
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VCA = Voltage Controlled Amplifier.

Essentially, the output level is determined by a DC control voltage that itself can easily be controlled by a single pot which you can buffer and feed to a number of channels.
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Old 4th October 2003, 10:23 AM   #5
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Simplest way, used on most stereo amps, is dual gang pot (two sections mechanically ganged together) - available most parts suppliers.

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Old 4th October 2003, 10:36 AM   #6
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hhhhm heard of those vca's

but i think they are not so "hi-fi" am i right ?
any part no. plz
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Old 4th October 2003, 10:40 AM   #7
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You can make a discrete VCA but as you note feedback will change with volume.
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Old 4th October 2003, 10:50 AM   #8
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ok thanx
i guess theres no good way to make a single pot stereo volume control
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Old 4th October 2003, 11:38 AM   #9
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the ADC0804 relays volume controll of aleph p 1.0 uses an single pot that controls the ADC, and this a relay ladder for 2 channels.

Would you describe why you want to use a single pot?
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Old 4th October 2003, 11:42 AM   #10
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i gust wnted to know if theres a way to do that
no particular reason
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