Default audio card about bluez-alsa HOT 3 CLOSED

Ha! Nevermind, managed to find it myself:
Just replaced bluetooth with bluealsa and then for the sake of convenience btheadset to default (!default actually).
Now my whole system spits out sound to my soundbar. Only issue though is the buffering being quite big. On my senheiser speakers they will play at a higher sample rate (barely noticeable, like 5-10% oversampling) so that way they ca reduce the samples in the buffer and make sure the latency is low.
Any ideas on that?

from bluez-alsa.

To be honest I have no idea what might cause oversampling. The first thing which comes to my mind is sampling frequency incompatibility. However, I can see, that in your configuration you are using plug plugin, which should autocorrect this issue.

It is possible to detect whether this issue is caused by bluealsa, though. You have to save raw audio from ALSA PCM plugin (before it is sent to the bluealsa) and/or from the bluealsa IO thread function (assuming that SBC was selected as an audio codec, otherwise here).

After these lines, add something like:

write(f, head, len /* or "samples * 2" */); // one sample is 16 bit

and before while or for loop add:
int f = open("/tmp/xxx.raw", O_WRONLY|O_CREAT, 0644);

This should save all incoming PCM data. Afterward, you can play these files (providing correct sampling and number of channels).

If oversampling occurs in both cases, then it is a proof, that something is wrong with plug plugin. Oversampling in the data saved from the "bluealsa" server - definitely an issue with bluealsa :)

from bluez-alsa.

from bluez-alsa.