Shift before writing to speaker

[sammachin]

I'm receiving PCM audio frames via a network interface and then in the callback for that I call I2S.write.

Everything works well apart from the audio is a little quiet, especially when compared to a locally generated tone.

I've tried to use I2S.shift on the data before i call write but I get the error:
TypeError: object with buffer protocol required

this is my code, the audio data is in msg. and spk is my I2S device

 if ttype == 'aud':
            I2S.shift(buf=msg, bits=16, shift=2)
            spk.write(msg)

[miketeachman]

Can you share more of the code that shows this problem?

[miketeachman]

No response to the request for code showing the problem, so I assume the issue has been resolved.