Quote:
Originally Posted by JamesPeters
This is using ALSA with blocksize 256 (3 buffers) and even with blocksize 512.
I tried with PulseAudio but I can't get it to do the same thing.  That could be due to the fact PulseAudio has a lot more latency (even though it reports very low latency, it must have another component to the total latency that Reaper doesn't "see"). |
I see MUCH better performance in REAPER using Jack audio than ALSA.
With both ALSA and Jack set for 44.1k, 64 samples latency, 2 periods, and a priority of 80, my most recent project, which is a big stress test in itself, will play without artifacts using Jack, but makes sputtery sounds during playback using the same settings using ALSA. It even makes occasional pops and clicks while not playing if I stop it after getting some while playing. I'm letting REAPER start Jack with the custom command.
/usr/bin/jackd -P80 -dalsa -dhw:M2496 -r44100 -p64 -n2 -Xseq
I just re-tested to confirm and Jack will play the song without issue, where ALSA gets about a minute in and starts frazzing out.
Likely different setups and soundcards will get different results, but in my case Jack is MUCH more efficient with a pair of Delta 2496 PCI cards and a 2.66Ghz i5.