Linux-audio-user January 2005

linux-audio-user@lists.linuxaudio.org

207 participants
246 discussions

[linux-audio-user] alsa clients plugged into jackd with jackplug

by Esben Stien

I don't think I understand this jackplug concept. I'm trying to get an alsa client, such as aplay to play through jackd. I've setup jackplug in /etc/asound.conf pcm.jackplug { type plug slave { pcm "jack" } } pcm.jack { type jack playback_ports { 0 alsa_pcm:playback_1 1 alsa_pcm:playback_2 } capture_ports { 0 alsa_pcm:capture_1 1 alsa_pcm:capture_2 } } I then tell aplay to use: #aplay -d jackplug foobar.wav But aplay plays the file even if jackd is not started; why?. Isn't jackplug supposed to show up in my jack connections when aplay is playing? I seem to be missing something vital. Is there some way to make a "fake audio device", like hw:3,0 that alsa applications can connect to so that I can get the audio out and then send it through jack, process it and then send it to the real audio device? -- Esben Stien is b0ef(a)esben-stien.name http://www.esben-stien.name irc://irc.esben-stien.name/%23contact [sip|iax]:b0ef@esben-stien.name

17 years, 8 months

[linux-audio-user] Re: Boa-Conductor (was re: Raton)

by David Baron

On Wednesday 19 January 2005 19:02, linux-audio-user-request(a)music.columbia.edu wrote: > > So how would Raton-Conductor work? Again, not as simple as it sounds. > > Minimally, one would move the mouse in a ecliptic (or circular) motion > > (as suggested by MagicBaton's instructions for beginners). The size of > > the vertical diameter (or average diameter) would be the > > volume/expression and tempo or time-codes set by the change in vertical > > direction from down to up. Real conducting patterns are more complex but > > these two principals would more or less remain. > > I started tinkering after I read your message, and I created a little > gadget that traces mouse motions and recognizes fairly general conducting > patterns. One can extract timing and intensity information for the purpose > of generating MIDI clock events as well as MIDI controller values. I'm > tentatively calling it Boa Conductor. Cool! > > I've got a few questions: > 1. Is anyone interested in a tool like Boa Conductor? What I've done so > far was just for kicks; I now have to decide how much time and effort > to put into polishing it. I, of course, would be interested. > 2. Are there any MIDI sequencers/players for Linux that can be driven > by external clock messages? My understanding is that Rosegarden does > not currently work as a slave but that may change in the future. > MusE can work as a slave, but I never used it before (has anyone > tried driving MusE with clock messages?). I don't think timidity > expects to be driven by a MIDI clock. How about other MIDI players? > 3. Would it make sense to have a feature that uses JACK Transport > rather than MIDI clock? There are a few alternatives. Not much that I have on Windows or Linux support clock messages. MagicBaton was a MIDI-player that added events based on the mouse-conducting. Alternatives: 1. Run the Boa in Parallel with whatever sequencer or player is going through jack or such. Boa would then put out simply omni/overall level and tempo events. 2. Run Boa as a plug-in Rosegarten, Muse or other such program. In this case, it would work on one track/channel and insert expression (and tempos) or in an omni mode as above. For rehearsing (MagitBaton's parlance) one track, one would probably want to disable tempo changes and conduct expression. Omin/overall would do level and tempo. 3. Controlling another software via midi-clock and some volume control device. This assume, naturally, that this software is available :-)

17 years, 11 months

[linux-audio-user] more music with Ardour

by Dave Phillips

Greetings: I've added another recording to my "music made with Ardour" page, a guitar duet this time. It's a performance of an old Jimmy Dorsey tune called Maria Elena, you can check it out here: http://linux-sound.org/ardour-songs.html Best, dp

18 years, 2 months

[linux-audio-user] emu10k1 multichannel support

by Lee Revell

I posted this to alsa-devel but since my previous post on this list generated a lot of interest, I am just reposting it here. As promised, here's an updated patch to add real multichannel playback support (and improved multichannel capture) to the emu10k1 driver. http://www.alsa-project.org/~rlrevell/emu10k1-multichannel-v001.patch Please test it and report any problems. I am especially interested in any regressions that impact regular PCM playback (the hw:0,0 device). QuickStart: $ jackd -R -v -d alsa -P hw:0,3 -C hw:0,2 -S I tested this and it works well with 16in/16out at 128, 256, 512 frames. 32 and 64 should work too but I can't test as I'm running a stock 2.6.10 kernel for now ;-). You can check that the routing is correct by connecting a JACK client to the playback ports corresponding to the FX buses described in Documentation/Audigy-mixer.txt and Documentation/SB-Live-mixer.txt, and verifying that the output appears on that channel (the FX buses are numbered from 0 but JACK numbers clients from 1). For example (from SB-Live-mixer.txt): name='Music Playback Volume',index=0 This control is used to attenuate samples for left and right MIDI FX-bus accumulators. ALSA uses accumulators 4 and 5 for left and right MIDI samples. The result samples are forwarded to the front DAC PCM slots of the AC97 codec. So "alsaplayer -o jack -d alsa_pcm:playback_5,alsa_pcm:playback_6" should output to FX buses 4 and 5, which you can test by lowering the 'Music' control in alsamixer. With an SBLive, use ports 1 and 2 for the front channels, 3 and 4 for the rear channels. The Audigy uses different channels, see the above docs for more info. In addition to multichannel recording applications, this should also be useful for OpenAL implementations, which are currently restricted to using 21 sources due to the use of an extra voice per stereo PCM. This should allow up to 63 sources. This also adds some new register info including a per channel half loop interrupt that I have discovered by reverse engineering the Windows drivers. Improvements over previous versions: - Routes the 16 channels to the 16 FX buses by default. - Enables the first 16 FX capture outputs by default, required for full duplex operation at latencies lower than 512 frames. - Rewrote the voice allocator to use a more efficient round robin algorithm, eliminating the need to reserve the first 16 voices for the multichannel device. The next free voice is maintained in the card record and the search starts from there. - Use an extra voice for playback timing rather than the EFX capture interrupt. I was only ever able to get that to work at 64 frames. Also there are definite advantages to being able to use the capture and playback devices independently. - Use the newly discovered per-channel half loop interrupt source for the extra voice rather than the channel loop interrupts. For unknown reasons, this works better for multichannel playback, and does not seem to affect regular PCM playback at all. TODO: - Fix the send routing and volume controls for the multichannel device. The current (copy and paste) solution assumes either one or two voices per PCM. So the default settings work fine but changing them with the mixer is likely to have unpredictable effects. - EFX capture should capture output channels 16-32 (mostly unused now) by default, so that we only capture the sources the user has connected to the multichannel recording inputs in the DSP manager. Typically FX buses 0-15 would be connected directly to FX outputs 16-32 so the capture channels would correspond directly to the playback channels. In order for this to work the default DSP configuration has to be changed slightly. Lee

18 years, 3 months

[linux-audio-user] Converting w64 to wav

by Arnold Krille

Hi all, what is the best and easiest way to convert a w64-file (from timemachine) into a wav-file? I am trying "sndfile <w64-file> <wav-filename>" but except 100% CPU-usage for _really_ long time nothing happens. No new file, no changes, no stopping after a time. I know that one of [audacity|sweep] opens w64-files but loads them into memory fully and the file to convert is 2.5GB. Can anybody give me some hints? Arnold -- There is a theory which states that if ever anyone discovers exactly what the Universe is for and why it is here, it will instantly disappear and be replaced by something even more bizarre and inexplicable. There is another theory which states that this has already happened. -- Douglas Adams, The Restaurant at the End of the Universe

18 years, 3 months

[linux-audio-user] Decent reverb, and DSP in hardware?

by Jon Morin

Hi all, This question is not really a problem with hardware or software per se, but I would just like to know what people's favorite reverbs out there are. I used to do all of my pro audio work on Mac and Windoze, and I'm having great success getting things working with Linux, but I've never really found any really decent reverbs, and this is unfortunately keeping me from doing more final mixes with Linux. What I'm looking for is something like a LADSPA or other plugin, or a program that will process sound non-realtime (or even destructively, like Audacity) with some decent sounding reverbs. The TAP Reverberator plugin was okay, I guess, but really the only other LADSPA reverb I've come across is Freeverb, which is not good, at least using it for intimate vocal tracks and guitars. I mainly use Ardour for tracking and mixing, Audacity for destructive editing and cleaning up tracks, and Csound, which I've been known to use for DSP a bit in the past. Maybe I just have not stumbled upon the right plugins or programs. Any suggestions of favorites? One more related question: Does anyone know if any soundcards with DSP in hardware work with Linux? I'm thinking of something along the lines of the Creamware cards (the ones with the integrated DSP's), but I'm assuming that most of these also need a software component to make them work, and that is most definitely closed-source. I can dream, though, right? Jon M.

18 years, 3 months

[linux-audio-user] Plans/Roadmaps for 2005?

by Florian Schmidt

Hi, i'm writing this email, because i'm interested in what plans the different linux audio developers have for the year 2005 Any new revolutionary applications planned? Major changes to some of the existing apps? So let us know. What are your roadmaps for 2005? What are you guys up to? Where is help needed? Anyways, i start off with my own stuff: amidimon - a terminal midi monitoring app which is very incomplete, but works good for me. I will finally add the autoconnection feature somewhere in the spring of this year. I have seen some alternative midi monitoring apps on the mailing lists in the last year, so maybe i just dump the project completely instead rtc_mtc_gen - a small MTC generator app for alsa_seq. I will teach it drop modes and FPS other than 30 Session - a small gtk2 app to organize collections of programs which make up a "session". I plan to add LASH support sometime this year. I think LASH needs a major revisiting though as imho the adoption of it is rather slow. Maybe it's already too intrusive to applications (i will start another thread on LASH specifically i think)? Session is still alpha (planning stage) and if anyone wants to get involved i will be all ears to suggestions.. The 2.6.x linux audio wiki - i need to definitely update it with newer information. Sadly spammers have discovered my wiki and i had to disable public editing access. This is the first thing i'll do after i have finished some university stuff. Find my stuff here: http://www.affenbande.org/~tapas/wiki/index.php?Ware and here: http://www.affenbande.org/~tapas/linux-2.6.x-ll.html Regards, Florian Schmidt -- Palimm Palimm! http://affenbande.org/~tapas/

18 years, 3 months

[linux-audio-user] Switching from a MOTU828mk2 to RME Cards?

by Josh Henne

About a month ago I was introduced to Agnula and Linux in general and to make things short I'm making an attempt to switch to Linux for audio work. So I've sold all my commercial VSTs, MAX/MSP, and will move to Csound, PD and Audacity. The only things left to do are to buy a combo DVDrw/cdrw drive, switch my cpu, ram and HD's over to a Shuttle lunchbox sized PC (for a less noisy system) and find a replacement for my MOTU 828 MK2. I am gearing towards an RME Hammerfall card and a behringer A8000 adat interface. Or would I be better off getting a PCMCIA adapter and going for the cardbus interface and Multiface? This is incase I get a laptop in the future. Too bad MOTU products aren't supported. Thanks Josh ------------------------------------------------- This mail sent through IMP: http://horde.org/imp/

18 years, 4 months

[linux-audio-user] MAudio Delta 1010LT

by Mike Jewell

Hi LAU, This is my first posting here. Hope to do lots more... I have a M-Audio Delta 1010LT multitrack sound card in my computer and am having lots of trouble with it. I'm running Linux 2.4 (Fedora Core 1) with the "Planet CCRMA" audio environment on a Pentium 4 PC. I use Audacity 1.2.3 for recording, etc. Everything worked fine with the built-in (stereo) sound on my motherboard. I installed the 1010LT and rebooted. The computer found the card and seemed to be happy with it. But many things seem to be wrong. I'm using envy24control to get the mixer, patchbay, sliders, etc. My main (first) question is how to get more than 2 channels recording at the same time? When I pick 4 channels in Audacity, it does indeed record 4 tracks but the second two are copies of the first 2. The little drop-down menu in Audacity for selecting the source (line-in, mic, etc) is empty and the input and output sliders seem to have no effect. Any helpful tips or pointers would sure be appreciated. I'm very new to Linux so you might need to t-a-l-k r--e--a--l s--l--o--w--l--y 8^) Thanks in advance, Mike Jewell

18 years, 4 months

[linux-audio-user] (no subject)

by mrmoo1231＠ahooyay.omcay

From: Phillip Blevins <phillip.blevins@email-addr-hidden> Date: Sat Jan 29 2005 - 22:18:25 EET <snip> >> Also, I've got about 4,000 cassette tapes I would like >> to digitize. I can do about 1.5 a day with it playing >> at regular speeds. Prioritize before you digitize! Do you really care if ALL 4000 make into CD/ogg/whatever? Tag your favorites or the rarest, or the ones that are most urgent, condition-wise, and go from there. Just my $0.02 :-) -Mark __________________________________ Do you Yahoo!? Yahoo! Mail - now with 250MB free storage. Learn more. http://info.mail.yahoo.com/mail_250

18 years, 4 months

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Linux-audio-user January 2005