Linux-audio-user July 2005

linux-audio-user@lists.linuxaudio.org

191 participants
230 discussions

Re: [linux-audio-user] How to catch midi events

by Pedro Lopez-Cabanillas

On Saturday 30 July 2005, Dubphil wrote: > it exists a tool that catch any midi events and feed stdout with all the > resulted parameters ? or what is the method to describe all the channels, > controllers... etc of the midi units ? I assume that you are using ALSA. If so, you can use my KMidimon utility. It has a nice KDE GUI: http://kmetronome.sourceforge.net/kmidimon/ If you prefer a CLI interface, you can use "aseqdump", included in alsa-utils-1.0.9, or "arecordmidi --dump" in previous releases. With a Gnome GUI and for OSS, there is GMidiMon: http://dufourko.free.fr/gmidimon/index.html Regards, Pedro

19 years, 5 months

[linux-audio-user] Mystery first "track" on many CDs?

by Paul Winkler

Hi folks, I'm batch-ripping and encoding a lot of my CD collection to put on my mp3 player. I've noticed that a number of CDs contain an apparently spurious first track that's apparently very short (about a tenth of a second) and contains no audible signal. What the heck is the point of this track? e.g. $ sndfile-info track00.cdda.wav Version : libsndfile-1.0.11 ======================================== File : track00.cdda.wav Length : 23564 RIFF : 23556 WAVE fmt : 16 Format : 0x1 => WAVE_FORMAT_PCM Channels : 2 Sample Rate : 44100 Block Align : 4 Bit Width : 16 Bytes/sec : 176400 data : 23520 End ---------------------------------------- Sample Rate : 44100 Frames : 5880 Channels : 2 Format : 0x00010002 Sections : 1 Seekable : TRUE Duration : 00:00:00.133 Signal Max : 0 (-inf dB) -- Paul Winkler http://www.slinkp.com

19 years, 5 months

[linux-audio-user] Newbie Linux user Struggling with MIDI

by Edward A Young

I could not run alsaconf until I located it; it was just not in my path, it was there. /usr/sbin/alsaconf

19 years, 5 months

[linux-audio-user] [Ardour/LADSPA] Sometimes do not work

by Emmanuel saracco

Hi, Sometimes I have trouble with LADSPA plugins within Ardour: 1/ Some plugins work, and some other not. 2/ A plugin can works well during a given session, but another time I do not hear any effect... Do you know why? My soundcard is SB Audigy (48Hz). Do you need some more information? Bye

19 years, 5 months

Re: [linux-audio-user] daily-use mixer for jack

by Leonard "paniq" Ritter

On Sunday 31 July 2005 01:05, Paul Davis wrote: > > based on the current layout of jack, writing an application that has an > > effect on all sound streams generated looks a bit hacked: > > of course, because if the user didn't route them through a single point > of control, then there is no single point of control - this is > deliberate, its not an error or an oversight. and here i am, pointing out a disadvantage of this concept :/ > > this mixer application would have to plug itself to the main outs and sit > > idle waiting for new connections. when a new connection connects itself > > to the main outs, the mixer app would disconnect the ports and reconnect > > them to the in-ports of the mixer application. > > "main outs"? what are they? my RME interface has 26 outputs. a delta > 1010 has 12. what are "the main outs" ? exactly these 26/12 outputs are the main outs. the same thing could btw be done with the main ins as well. in terms of the jack api, i could also call them ports with the hardware flag set. most jack programs automatically connect to the first hardware ports available, as far as i mentally gathered. > > instead, what about a final amp routine within jack that reads its amp > > value from a float shared in memory. other apps could read from/write to > > this float, and synchronization does not matter in this case. > > this was discussed at length during the design of JACK and rejected by > almost everyone. "naaaa" "naaaaaaaaaaaaaaaa" "hm ... na." "but..." "SHUT UP!" "ok" :P -- -- leonard "paniq" ritter -- http://www.paniq.org -- http://www.mjoo.org

19 years, 5 months

[linux-audio-user] daily-use mixer for jack

by Leonard "paniq" Ritter

hey, at the time i'm using freebob + jack as the only currently possible way to run my firewire audio card with linux. that means, i cant profit from the regular alsa goodness such as mixer consoles for quickly turning the overall master sound down and the like. does anyone know if there is a mixer panel for jack that just hooks in and controls the master volume for everything, just as kmix does? -- -- leonard "paniq" ritter -- http://www.paniq.org -- http://www.mjoo.org

19 years, 5 months

[linux-audio-user] How to catch midi events

by Dubphil

Hello, I have two midi unit with knobs and faders connected to an UM2 midi interface . But I just can't figure which unit is sending which information. When I use AMS or om-synth there is no problems for me because they got the midi learn feature, but when I must assign manually all the stuff, I'm completely lost :) it exists a tool that catch any midi events and feed stdout with all the resulted parameters ? or what is the method to describe all the channels, controllers... etc of the midi units ? Regards Philippe

19 years, 5 months

Re: [linux-audio-user] Range of instruments

by davidrclark＠earthlink.net

The recommendations given thus far are probably good choices for the original question. For those who really want to study *instruments*, I believe that the foremost text is: The Physics of Musical Instruments 2ed. (ISBN 0-387-98374-0), by Fletcher and Rossing. Some may say this is too technical; I say it's not technical enough, but merely an introduction. It does require some understanding of physics at the Halliday & Resnick level, introductory physics with calculus. (Oh, I keep forgetting that they added some guy named Walker.) Fletcher and/or Rossing have also published other books and articles that some readers may find more suitable.

19 years, 5 months

[linux-audio-user] Yet more music

by james＠dis-dot-dat.net

http://www.dis-dot-dat.net/content/music/unstuck.ogg Trying to make something that sounds like it's from a bass guitar. -- "I'd crawl over an acre of 'Visual This++' and 'Integrated Development That' to get to gcc, Emacs, and gdb. Thank you." (By Vance Petree, Virginia Power)

19 years, 5 months

[linux-audio-user] jack xruns on SUSE 9.3 with Edirol UA25 card

by Cesare Marilungo

Hi, I'm going crazy!!! Last night, after some months playing with Ubuntu, I installed SUSE 9.3 on my amd64 with an Edirol UA-25. I installed the kernel source, patched it with rt-lsm.patch, built the modules, installed ect. Added: /sbin/modprobe -r capability /sbin/modprobe realtime any=1 mlock=1 to /etc/init.d/boot.local At this point i got a lot of xruns even with jackd -R -dalsa -p1024 -n4. On Ubuntu I worked flawlessly with -p256 -3 (17ms). I recompiled jack from source (configured with /dev/shm as temp dir) and got the same results. Then I tried to shutdown some more services that were still on (firewall and so on). I restarted jack (via qjackctl) and the xruns were gone. I've pushed jack settings until I was able to play Zynaddsubfx on my midi keyboard (Edirol PCR30 - on a different usb port), thru Muse with some plugins applied to the input channel at: -p128 -n3 (8,7ms), with no xruns and no audio glitches. -p64 -n4 (5ms), still with no xruns but with some minimum gliches. I was so happy that I thought about letting my box run forever, without shutting it down anymore. But then I decided to install the drivers for the nvidia card (the newest from their site). I don't remember if I installed or updated some rpms at the same time. Rebooted. Since then I can't get rid of xruns and audio glitches even with a 1024 buffer. After some googlin I found some old posts on this list about conflicts with the nvidia driver so I tried to restart without it. Nothing changed. Please, help me. Because I will not go to sleep until I'll solve this. Cesare

19 years, 5 months

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Linux-audio-user July 2005