Dear TI expert,
when I change the setting of the NADC, MADC in the setting page of the clock, the final sampling frequency in the CCS software can not display correctly, the two values are not the same. do you know what is the problem?
and I check the register value of the NADC, MADC register, the changing is successful. 
Hello wxyxiangyang,
The USB audio sampling rate refers to the USB audio processor on the USB-MODEVM. This is set in the USB audio processor's firmware. If you are using an external audio serial interface to an audio analyzer or host processor then this can be ignored.
If you are wanting to test the device using the usb audio processor, then you do need to reprogram the EEPROM that holds the USB audio firmware. this can be done with the GUI by going to Tools/EEPROM Writer
once you click EEPROM Writer, click on the file browser icon (see below) and browse to the USBaudio firmware folder. the path is
C:\Program Files (x86)\Texas Instruments\ADC3101 CS\USBfirmware\image
The available usb audio sampling rates are shown below:
Best regards,
-Steve Wilson
