Re: [LAD] zita-ajbridge and aloop

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 2013-07-15 13:46, IOhannes m zmoelnig wrote: so now that it is basically running, i'm having troubles to make it run on the target hardware. when running zita-a2j resp. -j2a in verbose mode, i understand that the 1st number (the "loop error") should be as close to zero as possible. in practice they are varying wildly betweeen +16 and -10. how bad is this? more troubling however, is that whenever i start an alsa application (e.g. alsa_delay), one or both zita-*2* applications complain with: Detected excessive timing errors, waiting 15 seconds. This may happen with current Jack1 after freewheeling. (btw, i'm using robin's jackd2-1.9.10+nobus+20130114gite4730c6c-NMU1) after 15 or so seconds the waiting application recovers, only to hick-up again after some seconds (see end of email). even while the i'm running the programs as follows: jackd -dalsa -dhw:0,0 -r44100 -p1024 -n2 zita-j2a -v -d hw:Loopback,0,1 -c2 -r44100 -Q16 -p2048 -n2 zita-a2j -v -d hw:Loopback,0,0 -c2 -r44100 -Q16 -p2048 -n2 alsa_delay hw:Loopback,1,0 hw:Loopback,1,1 44100 2048 2 uname -a shows: Linux WandBoard3 3.0.35-wand6.2 #1 SMP PREEMPT Wed Jul 17 10:21:20 CEST 2013 armv7l GNU/Linux top doesn't show anything unusual: 20 0 4636 2344 2108 S 19.2 0.7 0:51.59 alsa_delay 20 0 86272 80m 79m S 9.1 24.9 0:12.38 zita-j2a 20 0 86272 80m 79m S 6.8 24.9 0:09.94 zita-a2j 20 0 92864 87m 80m S 2.9 27.0 0:05.00 jackd finally: i'm wondering a bit on how to choose proper values for period-size and fragement size. that is: should zita-*a* period/nfrags match those of jack and/or those of alsa_delay? fgmasdr IOhannes typical output of zita-a2j; -9.554 1.000058 -0.009 1.000039 -10.560 1.000043 9.244 1.000030 0.138 0.999943 3.434 0.999968 21.940 0.999898 16.323 0.999789 Detected excessive timing errors, waiting 15 seconds. This may happen with current Jack1 after freewheeling. Starting synchronisation. -8.978 1.002152 -12.058 1.004386 -8.960 1.006809 14.445 1.000016 -5.345 1.003726 6.023 1.002011 4.334 0.999910 -7.868 1.003941 13.211 0.998161 -0.939 0.999894 -10.023 1.003701 11.972 0.998262 -4.587 1.000754 -0.417 1.001475 7.652 0.997528 -11.767 1.002691 19.205 1.002144 Detected excessive timing errors, waiting 15 seconds. This may happen with current Jack1 after freewheeling.