Linux-audio-dev December 2004

linux-audio-dev@lists.linuxaudio.org

74 participants
64 discussions

[linux-audio-dev] Re: Re: Re: rosegarden, alsa_seq and usx2y rawusb

by Stefan Turner

> Try using -p128 -n2, and tell us whether you can't > notice any aural > difference, let alone if you can ignore a XRUN storm > =:) Ok, if it can get 2x128 that's quite tempting: I'd always assumed the crackling was a USB1 thing... I'd be grateful if you could give me a little help with it though please. I'm running PlanetCCRMA Fedora Core 1 at the moment. From your page I gather that I need jack-0.99.35.3usx2y.tar.gz. Am I right in thinking that the 'linux' section is kernel patches? Is there no way I can use this with the CCRMA 2.4.26-1 kernel (with low latency, givecaps, preempt etc)? > ... the new hwdep pcm (aka "rawusb") interface > available on the > sand-usb-usx2y alsa kernel module. Sorry I don't understand this at all. I can't find anything about sand-usb-usx2y, but do you mean if I installed latest alsa I could use sand-usb-usx2y in place of snd-usb-audio in modules.conf? Apologies for newbieness. Stefan Turner ___________________________________________________________ ALL-NEW Yahoo! Messenger - all new features - even more fun! http://uk.messenger.yahoo.com

20 years, 3 months

[linux-audio-dev] RME is no more

by Marek Peteraj

Hi all, sorry for crossposting, just wanted to let everybody know: The official statement is that there will be no support for ALSA (Linux) FireWire drivers from RME. In other words there will be no such drivers, as it is impossible to write them without tons of hardware and software documentation from RME. And we won't share these information with anyone. Regards Matthias Carstens RME No further explanations. The moral of this story is: Never buy a product that isn't already supported in ALSA, such as i did. :( There's no guarantee even if pretty much every other card from the same manufacturer *is* already supported. Me and Benno talked to Matthias personally during Musikmesse, he was friendly and seemed to be open with regards to future cooperation with oss developers. Seems like things have changed dramatically since then. Marek

20 years, 3 months

[linux-audio-dev] rosegarden, alsa_seq and usx2y rawusb

by Uwe Koloska

Hello, have now figured out how to drive my audio and midi with tascam us-122 on SuSE 9.2 -- and (after disabling all tv thingies) it works very reliable and with very few xruns. The following software seems to be involved: - linux-2.6.8-24.3 (SuSE Standard kernel -- heavily patched) patched with linux-2.6.8-24-usx2y-0.8.6.patch from rncbc (CONFIG_HPET_RTC_IRQ=n) - realtime-lsm-0.8.5 - ruis jack jack-0.99.21.1usx2y-17.suse92 - qjackctl-0.2.13-1 - rosegarden4-0.9.9-2 - ZynAddSubFX-1.4.3-141 With this configuration I have found a weird problem: When starting jack with driver 'alsa' (from qjackctl) I am able to play my alsa instruments (for example ZynAddSubFX) from within rosegarden: - start ZynAddSubFX - start rosegarden - choose ZynAddSubFX for the active track - play the keyboard an listen to nice ZynAddSubFX sounds ... But when starting jack with driver 'usx2y' the midi seems not to arrive at ZynAddSubFX (or Hydrogen or fluidsynth or ...) Even ASeqView doesn't show any incoming events if chosen as instrument in rosegarden. Restarting jack with driver alsa -- and all went well ... What is the problem? And what can I do to help with this problem? Are there any missing facts? Yours Uwe Koloska

20 years, 3 months

[linux-audio-dev] Firewire and Macie Onyx

by asbjs＠stud.ntnu.no

(Somewhat related to recent threads.) I see that the new Mackie mixers (the Onyx series) have the possibility to put in a card with D/A converters and a FireWire connection to a computer. I have bought one of these mixers, and might be interested in bying such a card for recording purposes. But it will need to have Linux drivers. How probable is it that Mackie will produce such drivers, or release the necessary specs? And, if given specs, can someone be persuaded to do a driver? (According to what I have read, the the card works just "out of the box" with Mac OsX's Core Audio drivers. While for MS Windows, drivers are needed.) Asbjørn Sæbø

20 years, 3 months

[linux-audio-dev] Re: rosegarden, alsa_seq and usx2y rawusb

by Stefan Turner

Since this has been mentioned, my US-122 doesn't work AT ALL using usx2y, but is fine with alsa. I am using qjackctl 0.2.13 and Jack 0.99.0 (the most recent versions AFAIK). All I get is: 17:47:12.866 JACK is starting... 17:47:12.867 /usr/bin/jackstart -R -dusx2y -dhw:1 -r44100 -p512 -n3 -H -M 17:47:12.873 JACK was started with PID=6369 (0x18e1). back from read, ret = 1 errno == Success jackd: unknown driver 'usx2y' 17:47:12.885 JACK was stopped with exit status=1. 17:47:14.885 Could not connect to JACK server as client. This doesn't bother me, unless there are meant to be advantages of using usx2y? Stefan Turner ___________________________________________________________ Win a castle for NYE with your mates and Yahoo! Messenger http://uk.messenger.yahoo.com

20 years, 3 months

Re: [linux-audio-dev] Patents on some Linux OS code

by eviltwin69＠cableone.net

On Wed, 8 Dec 2004 19:01 , 'Pedro Lozano' <pl2(a)ono.com> sent: >> 2) If such an issue should be discovered, Novell will back up the Linux >> side with their patent-portfolio, which (cough) *could* (cough) be an >> expensive experience for the attacker. > >Novell would back linux if they can get money from it, if the Singapore >administration doesnt buy linux from Novell I dont think they will get >involved. > IBM has already stated that if anyone goes after Linux with a patent issue IBM (the largest patent holder in the world) will go after them. >> >> 4) The end user is not responsible for what patent issues the producer >> might get involved with. > >Many companies thinks that it is, the SCO vs DaimlerCrysler case (because of >they use Linux) is an example, that case is because of copyright but surely >will be many like that because of patents. > An end user of a copyrighted/patented product is not liable for infringement suits *unless* the end user distributes the copyrighted/patented product in violation of the copyright/patent. If you just buy a product from a vendor and use it you aren't liable for infringement. You didn't infringe the copyright/patent, the vendor did. At any rate SCO is about to get its ass handed to it by DC ;-) Jan

20 years, 3 months

[linux-audio-dev] aubio - library for audio labelling

by jaromil

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 FYI, i spotted the first announcement of this library on freshmeat today aubio is a library for audio labelling. Features include onset detection (the complex task of labelling the beginning of notes and other sound events), silence detection (an easier but very useful task) and pitch detection (the estimation of the fundamental frequency of the sound). The aim is to add these automatic labelling features to other audio softwares. Functions can be used offline in sound editors and software samplers, or online in audio effects and virtual instruments. http://aubio.piem.org i think that Paul Brossier is not in this list... ciao - -- jaromil, dyne.org rasta coder, http://rastasoft.org -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (GNU/Linux) Comment: Cryptographically signed mail, see http://gnupg.org iD8DBQFBvBxbWLCC1ltubZcRAgcQAKDP/4ZPU8qaCrbY53uvisHVnmt+xgCg1iWJ RCOu0vEnDt76eTM7UfUnWy8= =Vbf8 -----END PGP SIGNATURE-----

20 years, 3 months

[linux-audio-dev] JAAA Bandw parameter

by Andrew Gaydenko

Hi, 1. Can anybody explain me (I think, Fons Adriaensen can :-) the JAAA "Bandw" parameter meaning? 2. When Bandw parameter is rather small, I see two spectrums - main (blue) and, below the first, - the second one (gray). What is the last spectre spectrum meaning? Andrew

20 years, 3 months

[linux-audio-dev] jack, low latency and IO

by Artem Baguinski

I'm a bit puzzled with this one thing about low latency and jack: real time bits can't do IO, but don't you get latency between say me pressing some button and sound doing click? there's no garanty the not realtime part of the application will run often enough to read the input device, no? just recently some heavy process started when i was fulling around with some soft synths [i know that shouldn't be happening, but i just recently switched distros and I haven't learned enough to write dont-bother-me script to switch all potential sources of disturbance] and the GUI of the soft synth became quite irresponsive, while audio went on without any glitches - that's I suppose because the audio part was running in realtime thread and decided itself when to yield cpu. is the only way to ensure the effects don't lag from control input to make sure I run as little processes as possible and hope the input thread will be scheduled often enough? -- Artem Baguinski: http://www.artm.org/ V2_Lab: http://lab.v2.nl/ V2_ Organisation for the Unstable Media: http://www.v2.nl/

20 years, 3 months

[linux-audio-dev] Patents on some Linux OS code

by Cornell III, Howard M

All, The 11/22 issue of Computerworld has a blurb about Microsoft CEO Steve Ballmer warning government leaders in Singapore that switching their 20,000 PCs from Windows to Linux could subject them to patent lawsuits. I have heard some tales about commercial versions of Linux including indemnification of users against these suits. What is the current status of the patent issues? Will they ever be resolved, or are all Linux users susceptible (proportional to the depth of their pockets)? Howard Cornell

20 years, 3 months

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Linux-audio-dev December 2004