10-14-2020, 01:53 PM
Quote:But.... still nasty spikes! Unfortunately.
ogg vorbis (the audio format used by Spotify) is not very streamable friendly. Meaning there is no real good mechanism for a player to play it other than to download it, cache it to memory (or disk) and then play it from that cache. The spike you're seeing is librespot downloading the audio file as fast as it can. That's normal. It shouldn't be a huge problem. If a Pi Zero can handle it the other Pi's should have no problem.
Quote:It looks like the PCM stream being output from the Spotify renderer is being upsampled after the fact by ALSA.
No. The effective sampling rate presented to the sound card is still 44100. I can't find out with a quick Google what the fraction after 44100 actually means but if I had to guess I'd say it's related to bytes per sec in relation to the buffer or something like that maybe?
