Raw Audio API

[andree182]

Is there an existing issue for this?

• I have searched the existing issues

Proposed feature request

Access to raw audio data would be great, so that apps like e.g. guitar tuners, tone generators or navigation instructions player could be created.

Alternatives

Using internal API or raw access to hardware registers.

Anything else?

No response

[thePHTest]

This is something I am extremely interested in. The microphone is the primary reason I ordered a pebble time 2 so I really hope this becomes available.

[ericmigi]

great idea! We'd definitely check out/help with any PRs adding this functionality

[andree182]

@ericmigi patiently waiting for the actual hw to arrive and schematic reveal (if that happens) :-)

But you seem to already have some base drivers there...

https://github.com/coredevices/PebbleOS/blob/main/src/fw/drivers/sf32lb52/audio/audec.c
https://github.com/coredevices/PebbleOS/blob/main/src/fw/drivers/mic/sf32lb52/pdm.c

[ericmigi]

yes the microphone already works great, but there's no SDK API for 3rd party apps to access it. that's what this issue is related to.

[pizzaisdavid]

I don't know how it should work and many people probably already know this, but I learned that there is a dictation API:
https://developer.repebble.com/guides/events-and-services/dictation/

But it doesn't return any audio raw audio data but the transcribed text.
It could probably still be used as a starting point.

This seems to be some corresponding code:

PebbleOS/src/fw/applib/voice/dictation_session.c

Line 158 in a84c84a

DictationSessionStatus dictation_session_start(DictationSession *session) {

[matejdro]

My use case for this goes hand in hand with #416 - after watchapps can have more storage, we could record voice dictation offline and then transfer/transcribe it after bluetooth reconnects