Our application is to record the two audio inputs VinR and VinL to the PC (via USB). We are not playing any sound to the audio outputs.
Do we need to add low pass filter before VinR and VinL (PCM2904 audio inputs)?
in The picture from page 27 of the datasheet. The application is using a regulator IC1. There is another schematics in page 28 without the regulator but according to the datasheet the A/D performance will be degraded.
Please explain this in more details. Please let me know if we need IC1 for our application and if there is a lower cost alternative.