Giso Grimm <gg3137@xxxxxxxxx> writes: > Here is data for the Focusrite Scarlett solo for all period sizes P from > 16 to 240 frames in steps of 16 frames: > > P frames ms > 16 114.847 2.393 > 32 176.847 3.684 > 48 232.847 4.851 > 64 294.847 6.143 > 80 368.847 7.684 > 96 424.847 8.851 > 112 498.847 10.393 > 128 566.847 11.809 > 144 616.847 12.851 > 160 684.847 14.268 > 176 752.847 15.684 > 192 802.847 16.726 > 208 876.847 18.268 > 240 1000.847 20.851 > > This is almost perfectly 4*P+48, for all P. I can also start it with P = > 37 (an arbitrary prime number), so it looks that there is no limitation > on the period size. Also for such odd numbers it remains 4*P+48 (the > exact delay varies a bit between jack starts, which is normal for USB > devices). > > This is jackd2 - I don't know if jackd1 behaves differently (although > both would use the underlying ALSA layer). > > I started jack with > > jackd --sync -P 90 -d alsa -d hw:$CARD -r $RATE -p $PERIODSIZE --sync is not documented in jackd2's man page. What does it do? -- David Kastrup _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx https://lists.linuxaudio.org/listinfo/linux-audio-user
