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by walla
Fri Jun 20, 2014 5:48 pm
Forum: Graphics, sound and multimedia
Topic: RPi and real-time, low-latency audio
Replies: 189
Views: 83860

Re: RPi and real-time, low-latency audio

Hey AutoStatic, I did some more testing the last days and performance seems to improve using another interface. Today though I managed to get jack not to work at all anymore, by doing a general system update through sudo apt-get update sudo apt-get upgrade When I try to start jack now, it quits with...
by walla
Fri May 16, 2014 1:38 pm
Forum: Graphics, sound and multimedia
Topic: RPi and real-time, low-latency audio
Replies: 189
Views: 83860

Re: RPi and real-time, low-latency audio

I indeed use jack1. With the -P84 parameter I can finally execute your command. Don't know yet if it runs more stable. But I do get new messages now, of that kind: delay of 4227.000 usecs exceeds estimated spare time of 4199.000; restart They happen quite often, seemingly more often when I generate ...
by walla
Thu May 15, 2014 2:53 pm
Forum: Graphics, sound and multimedia
Topic: RPi and real-time, low-latency audio
Replies: 189
Views: 83860

Re: RPi and real-time, low-latency audio

Thanks, I did it, but it didn't help. I also rebooted the pi to see if that would change something, but I still can't get alsa running with 3 periods. I executed groups pi , and the user is definitely in the audio group. The file that got created by reconfiguring jackd (/etc/security/limits.d/audio....
by walla
Wed May 14, 2014 8:08 pm
Forum: Graphics, sound and multimedia
Topic: RPi and real-time, low-latency audio
Replies: 189
Views: 83860

Re: RPi and real-time, low-latency audio

Hey AutoStatic, thanks for the quick reply! When I start jackd the way you proposed, it quits right away, with the following output: loading driver .. creating alsa driver ... hw:1|hw:1|256|3|48000|2|2|nomon|swmeter|soft-mode|32bit control device hw:1 configuring for 48000Hz, period = 256 frames (5....
by walla
Wed May 14, 2014 11:32 am
Forum: Graphics, sound and multimedia
Topic: RPi and real-time, low-latency audio
Replies: 189
Views: 83860

Re: RPi and real-time, low-latency audio

Hello everybody, I am trying to get JACK running on my Raspberry. My ultimate goal is to have a Python script that simultaneously plays and records at least one channel of audio for a couple of seconds. But at the moment I can't get JACK / ALSA to run stable. I did download the JACK version from the...

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