JackAudio February 2018

jackaudio@lists.linuxaudio.org

21 participants
16 discussions

by Chris Caudle

On Sat, February 10, 2018 12:08 pm, Benny Alexandar wrote: > In the latest installation of jackd (1.9.12) the man page for zita-a2j/j2a > says at the end ported to C code, where can I find this ported C source code. > Is it freely available or as lib ? It would be freely available, but I have not seen that note. Check the jack github pages, it could be referring to the equivalent function included as part of the jackd v1 code. -- Chris Caudle

6 years, 10 months

[Jack-Devel] Midi out no longer showing up in patch bay

by lowkeyoutlaw

Hello! OK, previously I had Akai MPC 2.0 Jacked to Harrison Mixbus and it worked perfectly. I had to format my HDD & reinstall Windows , and I set everything up exactly the same, yet Jack cannot see the MPC's midi out now. I use W10 Pro x64, 8gb ram. Audio connections are working perfectly. Mixbus can see the MPC's midi out, but Jack cannot. MPC midi out is handled by a separate application called midimon.exe and is normally seen as "AkaiProInternalMidi." In both the connections section and the patchbay, it's as if it doesn't exist. I tried installing it as admin, and running it as admin too, no change. Is there a way to force Jack to see it? MPC has a crippled mixer, Jacking it to Mixbus is a crucial part of my workflow. Please help! Thank you. -- Sent from: http://jack-audio.10948.n7.nabble.com/Jackit-f3.html

6 years, 10 months

[Jack-Devel] Debian package

by Robert Bielik

Hi, I've built jack2 without dbus support for my headless RPi3 but now I'd like to easily install it on another Pi (Zero), so preferrably I'd like to create a .deb package. How do I go about doing this ? Regards /Robert

6 years, 10 months

[Jack-Devel] Capture problems with jack2 on Axia-Alsa device

by Christian Affolter

Hi everyone, capturing from ALSA capture devices via the Jack2 sound server (1.9.12), results in too high pitched wav files (they are playing "too fast" and sound like the "chipmunks"). If I run the same capture directly from the ALSA devices (without Jack involved), everything sounds as expected without any problems. Audio examples: Capture via jackrec: https://filebin.ca/3pyMxBw8cexQ/test-jackrec.wav Capture via arecord: https://filebin.ca/3pyOPjcKGym5/test-arecord.wav The device in question is a "virtual" Axia-ALSA (Livewire+) audio device on CentOS 7 which operates at a sample rate of 48kHz and a bit depth of either 16 or 32. As far as I can see, the sample rate and format detection on the Jack side looks correct. I'm therefore looking for some guidance on how to further debug this, I most certainly missed something obvious. I've also tried to play an mp3 file via mpg123 over jack (without the involvement of the Alsa device) and record it again with jackrec. This works and sounds correct. Here is what I've tried and what the environment looks like: # Capabilities of the Axia-ALSA device arecord -D hw:0 --dump-hw-params Recording WAVE 'stdin' : Unsigned 8 bit, Rate 8000 Hz, Mono HW Params of device "hw:0": -------------------- ACCESS: MMAP_INTERLEAVED RW_INTERLEAVED FORMAT: S16_LE S32_LE SUBFORMAT: STD SAMPLE_BITS: [16 32] FRAME_BITS: [16 256] CHANNELS: [1 8] RATE: 48000 PERIOD_TIME: (41 1365334) PERIOD_SIZE: [2 65536] PERIOD_BYTES: [64 131072] PERIODS: [1 1024] BUFFER_TIME: (41 1365334) BUFFER_SIZE: [2 65536] BUFFER_BYTES: [64 131072] TICK_TIME: ALL -------------------- arecord: set_params:1299: Sample format non available Available formats: - S16_LE - S32_LE # Capture via arecord directly from the ALSA device (without jackd) # This works as expected and the WAV file sounds fine arecord -D hw:0 -c 2 -d 10 -r 48000 -f S32_LE -v /tmp/test-arecord.wav Recording WAVE '/tmp/test-arecord.wav' : Signed 32 bit Little Endian, Rate 48000 Hz, Stereo Hardware PCM card 0 'Axia' device 0 subdevice 0 Its setup is: stream : CAPTURE access : RW_INTERLEAVED format : S32_LE subformat : STD channels : 2 rate : 48000 exact rate : 48000 (48000/1) msbits : 32 buffer_size : 16384 period_size : 4096 period_time : 85333 tstamp_mode : NONE tstamp_type : MONOTONIC period_step : 1 avail_min : 4096 period_event : 0 start_threshold : 1 stop_threshold : 16384 silence_threshold: 0 silence_size : 0 boundary : 4611686018427387904 appl_ptr : 0 hw_ptr : 0 # playing arecord wav (via my local notebook's HDA Intel PCH # device), sounds correct aplay test-arecord.wav Playing WAVE 'test-arecord.wav' : Signed 32 bit Little Endian, Rate 48000 Hz, Stereo # Starting jackd # Verbose output at: https://pastebin.com/YzHEGSnR jackd -d alsa -d hw:0 jackdmp 1.9.12 Copyright 2001-2005 Paul Davis and others. Copyright 2004-2016 Grame. Copyright 2016-2017 Filipe Coelho. jackdmp comes with ABSOLUTELY NO WARRANTY This is free software, and you are welcome to redistribute it under certain conditions; see the file COPYING for details no message buffer overruns no message buffer overruns no message buffer overruns JACK server starting in realtime mode with priority 20 self-connect-mode is "Don't restrict self connect requests" audio_reservation_init Acquire audio card Audio0 creating alsa driver ... hw:0|hw:0|1024|2|48000|0|0|nomon|swmeter|-|32bit configuring for 48000Hz, period = 1024 frames (21.3 ms), buffer = 2 periods ALSA: final selected sample format for capture: 32bit integer little-endian ALSA: use 2 periods for capture ALSA: final selected sample format for playback: 32bit integer little-endian ALSA: use 2 periods for playback # Capture via jackrec # This results in a too high pitched WAV file # Verbose output at: https://pastebin.com/PCnymKLA jackrec -f /tmp/test-jackrec.wav -d 10 -b 32 system:capture_1 system:capture_2 # playing jackrec wav (via my local notebook's HDA Intel PCH # device), sounds incorrect aplay test-jackrec.wav Playing WAVE 'test-jackrec.wav' : Signed 32 bit Little Endian, Rate 48000 Hz, Stereo System environment: Distribution: CentOS 7.4.1708 Kernel: 3.10.0-693.17.1.el7.x86_64 ALSA Utils: 1.1.3 Jackd: 1.9.12 The jackd was rebuilt from Fedora source RPM to be able to test with the latest version: https://build.opensuse.org/package/show/home:radiorabe:audio/jack-audio-con… Many thanks and best regards Chris

6 years, 10 months

Re: [Jack-Devel] ?==?utf-8?q? Usage feasibility Q

by Ralf Mattes

Sorry, posted with wrong sender ... Am Mittwoch, 31. Januar 2018 17:25 CET, "Ralf Mattes" <r.mattes(a)mh-freiburg.de> schrieb: > > Am Mittwoch, 31. Januar 2018 17:07 CET, Robert Bielik <Robert.Bielik(a)dirac.com> schrieb: > > [...] > > jackd 578 pi 3u REG 0,16 12 11510 /dev/shm/jack_sem.1000_default_system (deleted) > > jackd 578 pi 4u CHR 116,0 0t0 11412 /dev/snd/controlC0 > > jackd 578 pi 5u unix 0xb78a4380 0t0 8031 /dev/shm/jack_default_1000_0 type=STREAM > > jackd 578 pi 6u CHR 116,16 0t0 11413 /dev/snd/pcmC0D0p > > jackd 578 pi 7u CHR 116,24 0t0 11414 /dev/snd/pcmC0D0c > > jackd 578 pi 8u unix 0xb78a7b80 0t0 8033 type=STREAM> jackd 578 pi 9u REG 0,16 12 8034 /dev/shm/jack_sem.1000_default_freewheel (deleted) > > jackd 578 pi 10u unix 0xb78a7800 0t0 11511 /dev/shm/jack_default_1000_0 type=STREAM > > /home/pi/start_jack > > Interesting to see the DEL for file descriptor. > > Well, that means that "someone" removed those files from the filesystem. Since the jackd process still > hase the file descriptors open the files are still there, but since the have no name anymore they are > inaccessible ... > Now you only have to find out _who_ did it ;-.) > > > Cheers, RalfD > >

6 years, 10 months

[Jack-Devel] Log output for inprocess clients

by Robert Bielik

Hi all, I'm putting together an inprocess client (as it was the lowest hanging fruit), but I'd like to output log messages, I note that outputting to stdout/stderr doesn't seem to work. Is there any API into which I can hook my logging framework output ? Regards /Robert

6 years, 10 months

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JackAudio February 2018