Audio Application SD card playback with different WAV sample rate

[erickcinco]

Hello,

I noticed the Audio application explicitly states that WAV sample rates other than 48kHz is not supported.

Is there any risk to modifying the code to support other sample rates, specifically 16kHz?

For my application I prefer the much smaller size for audio files with 16 kHz at the expense of quality.

Any guidance on what may be affected by moving to 16kHz sampling rate is greatly appreciated.

[Samruddhi Jadhav]

Hi,

For WAV playback, the WAV files must be 48 kHz which is a software limitation. So, if you want to change it to 16 kHz, you might need to make the WAV reader use 16 kHz which is real file sample rate. Also, make sure the rest of the system such as the Bluetooth audio sample rate, I2S etc. has been configured to 16 kHz to avoid the app to convert between rates because it would be more costly for the CPU. 

Let me know if you have any further questions.

Best Regards,

Samruddhi