On Wed, Feb 08, 2017 at 03:12:37PM +0100, Jörg Müller wrote: > John Rigg informed me about the port-max-option of Jack. So I tried > running the following commands: > jackd --port-max 1024 -d alsa -C madifx_record_all -P madifx_playback_all > jackd -p 1024 -d alsa -C madifx_record_all -P madifx_playback_all > jackd -p1024 -d alsa -C madifx_record_all -P madifx_playback_all > > I also tried ommiting either the option of -C or of -P. But I keep > getting the same error: > jackd: ../linux/alsa/JackAlsaDriver.cpp:122: virtual int > Jack::JackAlsaDriver::Attach(): Assertion `fCaptureChannels < 256' > failed. > > So does that mean jackd doesn't recognize the parameter -p 1024? I just tried jackd -p1024 here and there's no error message. I don't have the hardware to easily test that many ports. I'm using pcm_multi with three ice1712 cards and that accepts the jackd -p1024 option. I tried adding jack clients until the default 256 ports was exceeded, and there's no problem (tried up to 324 ports so far). In jack2/common/JackGlobals.h it has the following: #ifndefine PORT_NUM_MAX #define PORT_NUM_MAX 4096 #endif It looks like there's a restriction on driver capture and/or playback channels somewhere, but you might have to grep through the alsa and jack2 source code to find it. John _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
