Hi again Fons. Fons Adriaensen <fons@xxxxxxxxxxxxxx> a écrit : > > jackd -r -d alsa -d hw:2 -P -o 8 -z shaped > > Why do you use -r ? Does your system not allow real-time ? Oops. I use a generic 3.7 kernel that allow real-time, so -r is bad. The correct switch is -R (default). > Why -o 8 ? Even if you have 8 outputs that is not necessary. Oops again; all channels are available without -o 8. > There is no need to resample anything. Right... This is your use case for zita-resampler: "The development of zita-resampler was triggered by the need to resample multichannel files (HOA, 25-ish channels), while still keeping some CPU capacity for other tasks." So I don't need it. Less is more! :) > Does hw:1 work with Jack ? Yes. > Did you connect anything to the zita-j2a ports ? Yes. > As said, unless you have some voodoo SW on your machine, that is not > possible. If mplayer uses jack, it doesn not know anything about the > sound card. Not the sample format, not the number of channels, only > the sample frequency. So Mplayer is just reporting the output frequency of Jack? > > Another problem: when starting Jack with a 2 channels sound card, > > Mplayer can't output more than 2 channels. > > Again, mplayer can't know this. Your are probably running on > some other soundcard, not using Jack. I confirm: when using Jack with the internal soundcard (with 2 output channels), Mplayer limit its number of output channels to 2, even if I specify the number of channels of my sound file (4) to Mplayer. Update: - I installed the latest Jackd (version 1.9.10 from Grame): zita-j2a now works! :) after the "Starting synchronisation" message, there's now a continuous sequence of numbers. Suggestion: a note in the documentation about the version of Jackd would help. - I installed the latest Mplayer (2): same behaviour... Thanks for you help. N.B. The descriptions in the man pages are inverted: zita-j2a - Use ALSA capture device as a Jack client, with resampling. zita-a2j - Use ALSA playback device as a Jack client, with resampling. -- Marc _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
