Linux-audio-dev

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4 participants
7441 discussions

[linux-audio-dev] New LAD site is up and needs work

by Ivica Ico Bukvic

Hi all, I've uploaded the LAD materials from Paul's server and Daniel has updated the DNS. So, the new site is residing at lad.linuxaudio.org and should be available as soon as I get the php working (hacking an OSX machine remotely is like pulling teeth :-P). That being said, the site as it is has tons of hard links utilizing the old linuxdj site and some of the subdir structure is messy (i.e. the lad site is currently in lad.linuxaudio.org/lad). This needs to be worked on before the site is fully functional. Whoever commits to fixing this up, I will gladly get you the account/pass info into the lad account so that you can make the necessary updates. Not to point any fingers, but I thought I saw Eric raise his hand to volunteer for this task? ;-) On a side-note, the consortium site has been also transferred. E-mail accounts have not been ported as of yet, but I hope to take care of that in the next week or so. In the meantime I've posted my work e-mail on the website until this transfer is complete. Dave, if you want to have your e-mail temporarily displayed on the linuxaudio.org contact page, so that you can be also contacted until the e-mail transfer is complete, just let me know and I'll update the site accordingly. Best wishes, Ivica Ico Bukvic, D.M.A. Composition Virginia Tech Dept. of Music - 0240 Blacksburg, VA 24061 (540) 231-7047 (540) 231-5034 (fax) ico(a)vt.edu http://www.music.vt.edu/people/faculty/bukvic/

18 years, 6 months

[linux-audio-dev] [Announce] MusE 0.8.1 released

by Robert Jonsson

This release note is for MusE 0.8.1. It is basically a bug fix release for a note-off bug that crept into 0.8. [General] MusE is a multitrack virtual studio with midi, external, softsynths and audio support. And a bunch of other things. [URL] http://www.muse-sequencer.org/ [Changes from the ChangeLog] * Added next/prev marker, keyboard shortcut * Added LASH support (patch from evermind @ gentoo) this also means that ladcca is no longer supported * Reverted fix for silent softsynths, synths were not silenced upon [stop]. * Added Motif-Rack idf from europeen [Known issues] See the errata section on the homepage for the latest: http://www.muse-sequencer.org/wiki/index.php/Errata0.8 For a complete list of changes see the ChangeLog: http://cvs.sourceforge.net/viewcvs.py/lmuse/muse/ChangeLog?rev=1.214.2.147&… ly_with_tag=REL07&view=auto Source download available: http://sourceforge.net/project/showfiles.php?group_id=93414&package_id=1842… Regards, /MusE Development team

18 years, 6 months

[linux-audio-dev] RE: [linux-audio-user] More about consolidation of the Linux audio online resources (was: linuxdj...)

by ico

> i haven't even unpacked the split tarballs i got from benno. i am happy > to host (i have disk space and bandwidth), but i'd be even slightly > happier giving it to someone else to host. your call :) :-) Well, apropos the "consolidation" concept, IMHO I think it would be a good idea. Then again, I do not wish to push this onto the LAD community unless others (or at least majority), and especially yourself (since you have volunteered your resources before me), are fine with it as well. So, FWIW I'd suggest moving the site as long as others are fine with it as well. My sincere apologies if my response seems to reek of vagueness :-) > i think we should go for the lad variant for now. Sounds good! Best wishes, Ico

18 years, 6 months

[linux-audio-dev] Midi Sync

by krampenschiesser＠freenet.de

Hi all, I'm currently writing a very simple step sequencer. It runs fine and has many features I wanted :P But the sync causes me headaches. I can start my sequencer more then one time(of course), so they all start in a sepereate window and have an own midi out thread. My problem is to sync them all. I thought that the main app, from which I launch the step seqs, has got an own thread, which count a whole tact and starts the selected midi out thread of the new seq. But as it is possible to use crazy length(as 1/7 or so) I think my sequencers will get out of sync. And if one sequencer hangs, it will get out of sync, too. But how can I get it back in sync? Questions questions questions... I hope you understand my problem and have a solution. p.s.: I want to keep it platform independent, as it uses rtmidi and sdl which run on all audio platforms. Christian -- If the facts don't fit the theory, change the facts. -- Albert Einstein

18 years, 6 months

[linux-audio-dev] FW: [linux-audio-user] More about consolidation of the Linux audio online resources (was: linuxdj...)

by ico

Just realized that this also matters LAD members, so I am also forwarding it to the LAD list. Best wishes, Ico > -----Original Message----- > From: linux-audio-user-bounces(a)music.columbia.edu [mailto:linux-audio- > user-bounces(a)music.columbia.edu] On Behalf Of Eric Dantan Rzewnicki > Sent: Monday, March 27, 2006 12:29 PM > To: A list for linux audio users > Cc: daniel(a)linuxaudio.org > Subject: Re: [linux-audio-user] More about consolidation of the Linux > audioonline resources (was: linuxdj...) > > ico wrote: > > Sounds absolutely fine by me! > > > > I am not sure which would sound better, linuxaudio.org/developers or > > linuxaudio.org/lad. IMHO both have merit. Should we have both (via a > > sym-link)? > > > > Please contact me off-list for the necessary login info so that I can > begin > > uploading stuff. > > So, Do we have a new LAD site available now? > > -ERic Rz. Not yet, I initially misunderstood Paul by skimming over his e-mail that he wanted to move the content. Now that I've figured that out, it seems that the only thing we need to get the site linked is Paul's current URL/IP where he's hosting the content. Paul? Also, I am not sure what would be more effective in terms of linking linuxaudio.org/developer or linuxaudio.org/lad. IMHO both have merit (the first does not have any redundancy in its name, but the second one is more accurate in terms of traditional LAD name). Perhaps someone else wants to chime in with an opinion on this one, or should we simply link both of them for the time being so that the site becomes available while we discuss the details? ;-) Ico

18 years, 6 months

[linux-audio-dev] ALSA Picture

by Richard Spindler

Hi, on my quest to understand the ALSA API, I created a little Image to get an overview about the various states and how they relate to each other. http://propirate.net/oracle/bilder/ALSA.png Hopefully I got everyting right, can you have a look at this image and tell me whether this is correct? Thanks -Richard

18 years, 6 months

[linux-audio-dev] select() ?? before snd_pcm_writei(handle, buffer, frames);

by kurmisk

Hi Developers. I have write my small _alsa_test_program_. [C code ckunkz see below] It works good but now i wanna before call rc = snd_pcm_writei(handle, buffer, frames); somehow check - is sound device free for this call or not. For OSS i have such problem solve with select() : fdo = open("/dev/dsp", O_WRONLY ); ..... FD_ZERO(&wfds); FD_SET( fdo , &wfds); Zeit.tv_sec=0; Zeit.tv_usec=1; response=select(fdo+1, NULL, &wfds, NULL, & Zeit ); Tnx in advance Alf int alsa_snd_pcm_open_write(unsigned int sample_rate__, unsigned int chan__ , snd_pcm_uframes_t * frames_p , snd_pcm_t ** handle) { int dir; // snd_pcm_t *handle; snd_pcm_hw_params_t *params; unsigned int val; int ret_fun; int chan_nr; snd_pcm_uframes_t frames; /* Open PCM device for playback. */ ret_fun = snd_pcm_open(* &handle, "default", SND_PCM_STREAM_PLAYBACK, 0); if (ret_fun < 0){ fprintf(stderr, "unable to open pcm device: %s\n", snd_strerror(ret_fun) ); exit(1); } /* Allocate a hardware parameters object. */ snd_pcm_hw_params_alloca(&params); /* Fill it in with default values. */ snd_pcm_hw_params_any(* handle, params); /* Set the desired hardware parameters. */ snd_pcm_hw_params_set_access(* handle, params, SND_PCM_ACCESS_RW_INTERLEAVED); /* Interleaved mode */ snd_pcm_hw_params_set_format(* handle, params, SND_PCM_FORMAT_S16_LE); /* Signed 16-bit little-endian format */ //snd_pcm_hw_params_set_format(handle, params, SND_PCM_FORMAT_S16_BE); chan_nr = chan__; snd_pcm_hw_params_set_channels(* handle, params, chan_nr); val = sample_rate__; snd_pcm_hw_params_set_rate_near(* handle, params, &val, &dir ); frames = * frames_p; //frames = 2048; /* Set period size to __nr__ frames. */ snd_pcm_hw_params_set_period_size_near(* handle, params, &frames, &dir); * frames_p = frames; /* Write the parameters to the driver */ ret_fun = snd_pcm_hw_params(* handle, params); if (ret_fun < 0) { fprintf(stderr, "unable to set hw parameters: %s\n", snd_strerror(ret_fun)); exit(1); } /* Use a buffer large enough to hold one period */ snd_pcm_hw_params_get_period_size(params, &frames, &dir); snd_pcm_hw_params_get_period_time(params, &val, &dir); } int main(int argc, char **argv) { ........ snd_pcm_uframes_t frames; unsigned int sample_rate; unsigned int chan; snd_pcm_t *handle; //---- sample_rate=44100; chan=2; frames=1023; // 4096 // frames=2047; // 8192 // frames=4095; // 16384 // frames=8191; // 32768 alsa_snd_pcm_open_write( sample_rate , chan , & frames , & handle); ....... while (1) { ....... rc = snd_pcm_writei(handle, buffer, frames); if (rc == -EPIPE) { /* EPIPE means underrun */ fprintf(stderr, "underrun occurred\n"); snd_pcm_prepare(handle); } else if (rc < 0) { fprintf(stderr, "error from writei: %s\n", snd_strerror(rc)); } else if (rc != (int)frames) { fprintf(stderr,"short write, write %d frames\n", rc); } ....... } snd_pcm_drain(handle); snd_pcm_close(handle); }// main ------

18 years, 6 months

[linux-audio-dev] Alsa Problem

by Richard Spindler

Hi, I'm still trying to grok alsa, and now I have the following problem: I'm using snd_pcm_writei to playback some audio, however, after a little time the call fails with the error: "File descriptor in bad state", which I believe I cannot recover from. Why does this happen, and what could I do about this? cat /proc/asound/card0/pcm0p/sub0/* prints the following stuff, I don't know whether this is helpful? access: MMAP_INTERLEAVED format: S16_LE subformat: STD channels: 2 rate: 48000 (48000/1) period_size: 8192 buffer_size: 16384 tick_time: 1000 card: 0 device: 0 subdevice: 0 stream: PLAYBACK id: VIA 8235 name: VIA 8235 subname: subdevice #0 class: 0 subclass: 0 subdevices_count: 4 subdevices_avail: 3 64 state: RUNNING trigger_time: 1143205215.076663000 tstamp : 1143205216.323831000 delay : 13856 avail : 2528 avail_max : 14368 ----- hw_ptr : 59872 appl_ptr : 73728 tstamp_mode: NONE period_step: 1 sleep_min: 0 avail_min: 8192 xfer_align: 8192 start_threshold: 1 stop_threshold: 16384 silence_threshold: 0 silence_size: 0 boundary: 1073741824

18 years, 6 months

[linux-audio-dev] Re: [linux-audio-user] [ANN] Kontroll

by Florian Schmidt

On Mon, 27 Mar 2006 00:49:04 +0200 Florian Schmidt <mista.tapas(a)gmx.net> wrote: > http://tapas.affenbande.org/?page_id=42 Oh and i forgot to ask a question: What is the canonical way for a gtk app to receive hotkey press events regardless of window focus? Flo -- Palimm Palimm! http://tapas.affenbande.org

18 years, 6 months

[linux-audio-dev] [ann] PDX7 V2 - A 6-Op-FM synthesizer for Pd

by Frank Barknecht

PDX7 V2 In 2001, I started learning Pd. The first bigger patch I did was a six operator FM synthesizer loosely modelled after the famous DX7, which I called PDX7. Now it's five years later and not only in retrospect this first patch is quite a mess. But I still like the sounds it generates. In the meantime I learned a lot more about Pd and about a lot of other things. So I thought, why not celebrate the fifth anniversary of me doing Pd, the fifth "birthday" with a cleaner version of the PDX7, that maybe others can understand to use as well. The result is the PDX7 V2. Read and hear more at: http://footils.org/cms/show/51 Ciao -- Frank Barknecht _ ______footils.org_ __goto10.org__

18 years, 6 months

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Linux-audio-dev