Does CP2615 support volume control from USB host to I2S output channel? I.e. If I change Operating System master volume, will it affect I2S output? So question is does this chip digitally will convert the USB audio to lower gain for I2S output?
Thank you very much,
I think usually 2 options to control the volume.
1. if the codec don't support gain change, the CP2615 could not change the codec gain. then the USB host would handle the volume change (digitally scale the data on i2s).
2. if the code support analog gain change, the CP2615 could communicate with the codec through I2C.
Check the CP2615 datasheet, some customization item may related with this.
But for the option 1, it may dependent with the application.
I did not try this yet, but it looks like the button in below picture related with this.
What I want to do with CP2615 is to make a standard USB 1.1 Audio sound card with sending I2s data to PCM5102a.
As I understand the standard drivers will work fine with all this? So if I plug the CP2615 in Windows 7, how do I know which codec will be applied? Isn't the USB 1.1 Audio standard strict about that? Question why I did choose the CP2615 over the PCM2705, is that for PCM2705 software/OS volume control does not work with I2S (stated in manual so and tested in practice - either full volume or mute..).
You could check if the codec was compatible with the CP2615 first, I think some KBA may helps.
I don't have comment on why choose CP2615 over PCM2705 because I don't know that device well.