Hello again,
AudioGuru:
Yes, low gain is the key i guess. That's why i always like to ask about how it will be used because that makes or breaks the device's usefulness in the application.
But i cant help but agree that i think a better op amp is in order here too, one made for low distortion, although i dont know what his target consumer is going to expect. Is this for transmitting voice, guitar, general music, etc.
I seem to remember a long time ago they made a very low cost dual op amp made just for audio apps, but cant remember the part number.
Waldo:
Oh ok, so this is a stereo ENCODER. The 'coder' terminology threw me a little there.
Now that we know exactly what this is going to be used for, it appears that you might be better off with a better op amp made for audio. There's a chance it might work ok though because i see you are using it in a low gain mode too, and that reduces the noise, but it depends on what you or whomever you are building this for likes or doesnt like, as in if they hear any objectionable noise. Depending on the output swing you may have to add resistors to ground on the output however, but i havent looked into this for this circuit too much yet.
So you may get away with using this op amp here. You can certainly test with it just to get everything working properly.