Linux-audio-user

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20637 discussions

[linux-audio-user] The trouble with disks

by John Anderson

I'm using ardour to do around 8 tracks of audio, not all have regions active all the time. Playing a session through the first time, I get grrrtz every so often, usually but not always accompanied by an xrun report from jack. It's correlated with disk activity. Which is a Fujitsu MAN3367 on an Adaptec 29160 and according to hdparm can do around 50Mb/s. Although in ardour the disk throughput indicator shows anything from 9 to 14, depending on the number of regions being played, and the scheduler settings in use. I guess that's because the disk has to seek for the data for various different regions. Which are on a Reiserfs partition. I'm using an Athlon 2200+ on an MSI motherboard with 1Gb of memory. This is after my nice dual-athlon motherboard died, which had none of these problems. <sigh> I'm using 2.6.0-test11 kernel (with pre-emption), and I've tried the as scheduler (with various settings), the cfq scheduler and the deadline scheduler (which seemed to be the worst for this kind of low-latency work). It's subjectively better than 2.4.22 with low-latency and pre-emption patches. top shows that whenever there's a dropout, the CPU has just spent anything from 6 to 30% on io wait. It's definitely not a sound card issue - once the session has played through once and the audio files are cached, I get flawless playback with ardour showing disk throughput of 190Mb/s, even with a compile going in the background. I spent a few days playing with PCI latencies as well, but that didn't make a difference. Dropping the SCSI controller tagged queue depth to 4 makes recording more reliable, but doesn't really help otherwise. It also doesn't seem to make much of a difference if I run jack with buffer size of 1024 or 256. I haven't tried lower than that, and the card (Terratec EWS88MT) won't go higher that -n 2 -p 2048. Short of getting another dualie motherboard (which is a PITA in this country, and expensive), is there anything else I can try? low-latency patches for 2.6 kernels? thanks John

21 years, 7 months

[linux-audio-user] Re:Changing ALSA driver.

by David Baron

Rmmod does (think it will) remove the driver. It will not, however, end the association of that driver with the sound card. Using the sound card configuring routine simply goes back to the erroneous maestro. If I manually change it, it exits complaining that the sndconfig entries are already there. All that is is an alias snd.... = maestro. I have two other devices around as well: 1. USB Roland MIDI. This appears to have been configured so I need some quick way of testing it out. Maybe I'll just start up rosegarden and see if it receives anything. 2. SW60XG ISA sound card. This uses no IRQ or DMA, just a settable port address. The card is supposed to be accessible using an mpu401 driver. How might I set this one up.

21 years, 7 months

[linux-audio-user] sfc-0.013 Released.

by holborn

sfc (SoundFontCombi) is a midi router oriented to mix sounds of your sound devices, up to 8 sounds can be mixed or split, for do that has six midi out ports and two midi in ports, up to six different devices can be used to produce combinations of sounds like some synthesizers. The connection with your devices are automatized, then you can load/save your "mixes" in banks of sounds, and change it via Midi Program Change message or by the computer. sfc take the advantages of ALSA sequencer for do that an of course you can use any kind of device who recognizes midi messages to produce sound, like emu10k1 hardware shythesizer, Timidity. FluidSynth, ZynAddSubFX, external expanders o synthesizers .... anything you want. Then you only need put Ardour in record mode and play .. :-) == v0.0013 (17/12/2003) == ---------------------------------------------------------------------------- - Load bank by config settings. - Improved window settings. - Small bug fixes. - Solved bug changing programs. - Added ability to change programs in main window. - Solved bug in help command line. - Load GMPresetList.txt by default. - Removed graphic thread solving CPU time bug. - Use GNU/Autotools scripts. sfc is available in: http://personal.telefonica.terra.es/web/soudfontcombi/sfc-0.013.tar.gz http://www.telefonica.net/web/soudfontcombi/sfc-0.013.tar.gz Grettings Josep

21 years, 7 months

[linux-audio-user] [ANN] AlsaModularSynth-1.7.1

by Matthias Nagorni

Hello, together with the latest release of MCP/REV/VCO-Plugins by Fons Adriaensen, AlsaModularSynth-1.7.1 can be considered as a major step forward in realistic virtual analogue modular synthesis. There are some new sound examples (.ogg) on alsamodular.sourceforge.net that give an impression of this. For a detailed list of what is new, check out the "News" section on the project page. Have fun ! Matthias -- Dr. Matthias Nagorni SuSE Linux AG Maxfeldstr. 5 phone: +49 911 74053375 D - 90409 Nuernberg fax : +49 911 74053483

21 years, 7 months

[linux-audio-user] M-Audio or Terratec?

by lau＠hippie-online.de

Hello, now that I learned from you that my SB live does not support direct digital input I decided to buy a new card. So far I dither between: - M-Audio Delta Audiophile 2496 - Terratec EWX 24/96 Which one would you prefer? Ciao, HippiE

21 years, 7 months

[linux-audio-user] Syncing Ardour and Rosegarden (or Muse)

by John Williams

I know that this is something of a FAQ, but I've been trawling the net for a couple of days and could not find an answer. So, apologies if I'm acting a bit clueless or lazy ... Anyway. I would like to set up synchronisation of ardour (ardour-0.9beta9-1.rhfc1.ccrma) and rosegarden (rosegarden4-0.9.5-1.rhfc1.ccrma) on Fedora. I have tried _many_ combinations of setting ardour and rosegarden as slave and master, and using MIDI or jack master/slave systems. No joy. It is possible? And if so, how? I am willing, once I find out how, to write it up and contribute it to some FAQ or WWW site, e.g. http://www.djcj.org/LAU/quicktoots/ TIA, John. John Williams Department of Marketing Otago University Dunedin, New Zealand

21 years, 7 months

[linux-audio-user] Muse strange problem with WAV play

by krozilo＠nm.ru

Hi! now i use muse 0.6.2, jack 0.9. i create new wave track, import wav file and try to play. the first time ok, but no sound on other times. when i press stop button during the playing, press <- button (go to start of song) and again press play, then muse play wav-track, but from the point of prev stop, not from the start of the wav-track. midi-tracks work ok. re-importing wav file and re-starting muse hasn't effect. only remove *.wca file. what is my mistake? sorry for my english, regards - Z.

21 years, 7 months

[linux-audio-user] Hydrogen 0.8.1

by Comix

Hydrogen 0.8.1 is out!! Features: __General__ * Very user-friendly, modular, fast and intuitive graphical interface based on QT 3 * Sample-based streo audio engine, with import of sound samples in .wav, .au and .aiff formats __Sequencer and mixer__ * Pattern-based sequencer, with unlimited number of patterns and ability to chain patterns into a song * Up to 64 ticks per pattern with induvidual level per event and variable pattern length * 32 instrument tracks with volume, mute, solo, pan capabilities * Ability to import/export song files * Unique human velocity, human time and swing functions * Tempo-sync'd delay bus * Export to .wav __Other__ * OSS and Jack audio drivers, with assignable Jack ports * ALSA MIDI input with assignable midi-in channel (1..16, ALL) * Import/export of drumkits Changelog: * Midi and CPU activity widgets * Jack transport slave mode * Multiple jack outputs * Resizable song editor * Seek in song clicking in the song editor * New mixer * 32 instruments * Custom pattern size * Per instrument output (jack driver) * MMC/MTC support (experimental) * i18n support Download: http.//hydrogen.sf.net Enjoy!! -- Alessandro <Comix> Cominu http://hydrogen.sf.net e-mail: comix(a)despammed.com Icq: 116354077 Linux User # 203765 [...Codito Ergo Sum...]

21 years, 7 months

[linux-audio-user] resend: more about sync (was: rosegarden/ardour, ardour/adat, etc.)

by Aaron Trumm

Hi all. I've been trolling and testing various sync methods and I've noticed some questions popping up. Is it just me or is the linux audio situation a bit incomplete at this point with regard to information on that subject? It may just be that most of the programs are still struggling to develope sync techniques (MTC, MMC, ADAT sync, SMPTE, jack transport, etc. etc.), but also is there a relative lack of info/tutorials/etc? The reason I ask, is because not only for my sake, but for the sake of the community, I'd sure be glad to try and make a dent in that, maybe document some toots, or whatnot. of course, this all has to be in sync (no pun intended ;) ) with the development of the capabilities... I wish I had time to sort of type out something more detailed - I'll get to that sometime here (running short on time right this minute :) ) one basic hole I see at least in my understanding, is what the HECK is jack_transport, how does it fit in, etc.? that's ONE - there are lots of holes for me *laugh* another curious one is ecasound? it's the veteren around here in a lot of ways - does it sync to anything? ok well I'll wait for thoughts and then as soon as I can get a chance, I'll write something longer and sort of put out to y'all what I've found out, and see what holes can be filled - cheers (sorry for any unclarity in this email, unclarity is why I'm starting this thread! :) ) - Aaron www.nquit.com

21 years, 7 months

[linux-audio-user] Re:How to change alsa driver

by David Baron

I have a debian/KDE setup using Knoppix. It assigned an incorrect driver to my sound card. Alsa has one (not tested--arg!) that MAY work. How to I make the substitution? Modprobe .... quits with an IRQ conflict as the other driver owns the slot.

21 years, 7 months

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Linux-audio-user