Not sure how many people have tried this for chip amps but wouldn't it make more sense to use a high quality dual VCA chip to control the volume with a single wiper volume POT?
This way there is no possibility of error in stereo balance like there are with cheaper or older stereo volume POTs.
Plus you could add a smoothing capacitor to the VCAs control voltage input so that there is no likelihood of a scratchy volume control down the road and smoother volume transitioning, and the VCA itself can double as the preamp!
I know in some higher end audio stereo mixing boards they use this method because it is less prone to error or maintenance.
I imagine this method would be cheaper to implement since single wiper POTs are much cheaper to manufacture than a high quality dual wiper types
I can't imagine others here have not tried this yet. Right?
For reference: Variable-gain amplifier - Wikipedia, the free encyclopedia
This way there is no possibility of error in stereo balance like there are with cheaper or older stereo volume POTs.
Plus you could add a smoothing capacitor to the VCAs control voltage input so that there is no likelihood of a scratchy volume control down the road and smoother volume transitioning, and the VCA itself can double as the preamp!
I know in some higher end audio stereo mixing boards they use this method because it is less prone to error or maintenance.
I imagine this method would be cheaper to implement since single wiper POTs are much cheaper to manufacture than a high quality dual wiper types
I can't imagine others here have not tried this yet. Right?
For reference: Variable-gain amplifier - Wikipedia, the free encyclopedia
There's actually quite a few DIY projects with VCA-based volume controls. I put together a six-channel control around the SSM2018T a number of years ago and it worked great. More recently I've seen some users experimenting with the THAT 2181 series.
THAT Corporation 2181-series Trimmable Voltage Controlled Amplifier ICs
Dave.
THAT Corporation 2181-series Trimmable Voltage Controlled Amplifier ICs
Dave.
Old not new...original data sheet for this one is 1995
LM1036
Linear - Audio Processing | Integrated Circuits (ICs) | DigiKey
http://www.ti.com/lit/ds/symlink/lm1036.pdf
🙂
LM1036
Linear - Audio Processing | Integrated Circuits (ICs) | DigiKey
http://www.ti.com/lit/ds/symlink/lm1036.pdf
🙂
I'm working on the revision of a 4-channel VCA control that uses the 2164 type. More info here:
http://www.diyaudio.com/forums/mini...-remote-volume-off-control-4.html#post4045977
http://www.diyaudio.com/forums/mini...-remote-volume-off-control-4.html#post4045977
- Status
- Not open for further replies.