Play audio snippet via nRF51/52

[Frits Jan]

I am working on a device which also needs to give audio feedback to the user. The app on the mobile phone needs to send a wav (or similar) file (mono, speech) to the device and the device needs to play it through a small speaker.

Is this possible with the nRF51/52 and if so can you direct me in what is needed for it to get it working (DAC, amplifier, how to transfer the data, (external)buffer/memory needed, etc?)

Thanks in advance!

[JohnBrown]

I believe it would be possible to play a basic sound on the nRF51 using PWM via the on-chip timers, but not while the soft device is running( I say this having successfully generated DTMF tones via PWM). I also believe I have read stuff recently relating to timeslots being available between SD operations, so I guess if your sound sample was very short, it might be possible.

[JohnBrown]

I am not able to answer that in any competent way, except to say that I think you will stand more of a chance if you move up to the nRF52 with its improved performance and DMA capabilities.

I minute of wave file is a lot of data, even if only 8 bits and 8kHz, which is barely "telephone" quality.