Linux-audio-user

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13 participants
20678 discussions

[linux-audio-user] signal processing kits

by Fabio de Matos

Hi, I'm looking for a platform for signal processing, who can be used in command line mode ( matlab like ), but is based in low level code ( c or c++ ), and block based signal chain. I wish i could find some kind of front end to any standard plugin types. It was desirable also that the standard plugin used is able to handle data other than audio ( not so hard, i believe ), and in other domains than time ( e.g. frequency, statistical, and weirdo like domains ). Preferably it should have support for gui also, basically for plotting graphics only. thanks all, Fabio

22 years, 11 months

[linux-audio-user] via82cxxx_audio

by Sakari Aaltonen

With help from a few kind people here, I got my ALSA sound working with xine. However, this was at 8 bits of color depth, and the video picture was not too good. So I tried 16 bits, which made xine fail, as it did MPlayer. But at 24 bits, MPlayer came to life and showed a picture that was (probably) as good as it gets. But... MPlayer doesn't like ALSA sound. It tries to keep video and audio in sync for 10 or 15 seconds; then it gives up and goes silent. It says my system is too slow; one of the reasons might be slow audio. So I thought I'd try the via82cxxx_audio module that is in the "official" 2.4.20 kernel. But... I can't insmod the module. It complains /lib/modules/2.4.20/kernel/drivers/sound/via82cxxx_audio.o: init_module: No such device Hint: insmod errors can be caused by incorrect module parameters, including invalid IO or IRQ parameters. You may find more information in syslog or the output from dmesg /lib/modules/2.4.20/kernel/drivers/sound/via82cxxx_audio.o: insmod /lib/modules/ 2.4.20/kernel/drivers/sound/via82cxxx_audio.o failed /lib/modules/2.4.20/kernel/drivers/sound/via82cxxx_audio.o: insmod via82cxxx_audio failed (No, neither syslog nor dmesf offers more information.) Am I missing a /dev? Which one? Thank you, Sakari Aaltonen

22 years, 11 months

[linux-audio-user] Terratec 128i PCI and MIDI

by Steve Harris

Hi, I just bought the obove card (an ES1969 Solo-1 apparently), in order to do MIDI, but I cant seem to get anything to work. $ cat /proc/asound/Solo1/midi0 MPU-401 (UART) Output 0 Tx bytes : 1400 Input 0 Rx bytes : 0 Buffer size : 4096 Avail : 0 Overruns : 0 But I tried connecting the external midi device to ASM with kaconnect and nothing appearing in the log window and the number dont change in proc when I press keys on a keyboard. I've replaced the joystick->midi cable and I'm not sure what else to try. Help! - Steve

22 years, 11 months

[linux-audio-user] quick ardour question

by Jonathan Turner

just a quick question (hopefully). In ardour I've been able to get a track to playback while recording another track, but I can't seem to play more than two tracks at a time, nor am I able to play two tracks while recording another. Is this a ALSA/soundcard limitation (I have the intel 8x0 series)? Okay, I lied, one more quick question... I've had ardour not play back samples when recording and I can't seem to put my finger one what causes it to mute the sample playback and what allows it to do duplex. Thanks all Jonathan

22 years, 11 months

[linux-audio-user] OMRL - New Mailing List

by Darren Landrum

Just to let everyone know, I have created a new mailing list for the OMRL at my studioconsul.net domain. To subscribe, send a blank email to: omrl-subscribe(a)studioconsul.net To unsubscribe, send a blank message to: omrl-unsubscribe(a)studioconsul.net To send messages to the list, send messages to: omrl(a)studioconsul.net You will need to confirm your subscription or unsubscription to/from the list. I also still need to figure out how the archiving system for this list software works. This is just a quick and dirty mailing list for now, so once I get a server and the OMRL domain up and running, I will probably migrate it over there. That should not be too difficult, though. See you on the new list. :) Regards, Darren Landrum

22 years, 11 months

[linux-audio-user] HDSP 9652 MIDI - A timing disaster?

by Mark Knecht

Hi, I asked about this two weeks ago but got no responses. I'm hoping this time I hear something back from other owners of the same hardware. I recently purchased an RME HDSP 9652 card. The card is working fine for audio, but the MIDI interface is a timing disaster. The interface works, but won't keep time. A 2 minute song is Rosegarden takes abut 2:45 to play every time. You can hear how the HDSP isn't delivering closely spaced MIDI events together, but is sort of smearing them out. My machine is set up using the PlanetCCRMA system. According to Synaptic my Alsa driver is from CVS:20021216. Jack is 0.44. This machine works just fine with the MidiMan 2x2 interface. No timing problems at all. Has anyone else purchased this card? Used the MIDI interface on this card? Gotten better results with this card? Can anyone suggest how I could go about fixing this myself? I'm not a programmer, so really hacking the code is doubtful, but this driver is acting like there is just a basic mistake somewhere. Possibly I could find it if I knew where to look. I hope someone will respond to this email so we can get something going to get this fixed. I really need this interface to operate soon. Thanks in advance, Mark

22 years, 11 months

[linux-audio-user] [ANN] swh-plugins 0.3.6 *cough*

by Steve Harris

* Really fixes the UID clashes. * Includes changes to make it build on ia64 and mips, thanks to Anand Kumria. I will now be walking around with a paper bag over my head for the next few days. - Steve

22 years, 11 months

[linux-audio-user] m-audio radium USB midi keyboard

by Eric Dantan Rzewnicki

http://www.m-audio.com/products/m-audio/radium.php Has anyone tried using this keyboard with linux, yet? I was about to buy an Oxygen 8, because I've read about several people in the LAD, LAU, ALSA community using them with linux successfully. But, then I saw this new Radium controller. It has 61 keys to the oxygen's 25, the same 8 knobs, pitch and mod wheels, and adds 8 sliders to the oxygen's 1. Would it be too far fetched to think that this would work as easily with a linux box as the Oxygen does? I would be very happy if it would. Thanks, Eric Rz.

22 years, 11 months

[linux-audio-user] swh-plugins 0.3.5 [bugfix]

by Steve Harris

The were some bugs in 0.3.4 so I'm releasing again. Sorry. * UID clash with flanger and l/c/r delay [serious] - spotted by Bob Ham, thanks * SC4 had the wrong label [mild but anoying] * autoconf script wasn't obeying CFLAGS [mild but anoying] I believe that SC4 and the lookahead limiter might be causing problems with some hosts as they have control outs. If you spot problems with these and think its the host, please contact the author. I know that ecasound and jack-rack handle it fine. - Steve

22 years, 11 months

[linux-audio-user] [ANN] ecasound 2.2.0 released

by Kai Vehmanen

1. A short summary of changes Support for JACK and LADSPA 1.1 added, more intelligent runtime parameter selection, ECI licence changed from GPL to LGPL, new NetECI client API, ecasound emacs mode added, largefile support, new resample, reverse and typeselect audio objects, new peak amplitude chain operator and new utilities ecalength, ecamonitor and ecasignalview. --- 2. What is ecasound? Ecasound is a software package designed for multitrack audio processing. It can be used for simple tasks like audio playback, recording and format conversions, as well as for multitrack effect processing, mixing, recording and signal recycling. Ecasound supports a wide range of audio inputs, outputs and effect algorithms. Effects and audio objects can be combined in various ways, and their parameters can be controlled by operator objects like oscillators and MIDI-CCs. A versatile console mode user-interface is included in the package. Ecasound is licensed under the GPL. The Ecasound Control Interface (ECI) is licenced under the LGPL. --- 3. Changes since last release Although over a year has passed since the last major stable release, ecasound development work has not stopped. To put things into perspective, a diff between 2.0.0 and 2.2.0 takes about 1.7MB of space. Considering the whole 2.2 codebase is just over 2MB, this is quite a lot! In the future there will hopefully be much more frequent releases. Here's a list of most notable changes: * Intelligent parameter configuration. Instead of one set of default parameters, ecasound lets user specify different parameters for three predefined profiles: real-time, real-time-low-latency and non-real-time. When starting processing, ecasound will automatically select and use most suitable profile for the given configuration. Ecasound will not only consider the types of objects, but also the runtime environment: whether it is possible to lock memory, to use RT-scheduling and so on. * The Ecasound Control Interface is now licensed under LGPL. In addition, the ECI implementations are now standalone, and do not require linking against libecasound and libkvutils. Only thing needed to run ECI apps is to have a working ecasound executable installed. * JACK support added. This is a major new addition as it involved making relatively large changes to the ecasound engine. * Up-to-date support for ALSA-0.9 and LADSPA-1.1. * Effect preset improvements. Support for parametrized presets has been improved. For instance it's now possible to write a wrapper effect preset for a complex ecasound effect or LADSPA plugin, and only publish a subset of original effect's parameters. * The disk i/o buffering subsystem that was introduced in ecasound 2.0 has been integrated more closely to the ecasound engine leading to better performance and reliability. * NetECI API. Ecasound now has a daemon mode that allows multiple clients, using the NetECI protocol, to connect to a running ecasound session. A proof-of-concept client, ecamonitor, is included in the package. It can be used to monitor ecasound session status from a separate console. This is especially useful in combination with ecasound's console mode user interface. The console interface can be used for control and the NetECI monitor client for getting real-time status information. In addition, NetECI can be used with all ECI apps. * Ecasound.el, an emacs ecasound mode and a Lisp ECI implementation. * Largefile support for reading and writing audio files larger than 2GB. * New audio object types: JACK, resample, reverse, typeselect. * New chain operators: peak amplitude monitor * Utilities: ecalength and ecamonitor added, ecasignalview totally rewritten. * New ECI implementations: Lisp, Perl and PHP (the last two are not included in the main ecasound package) Full list of changes is available at <http://www.wakkanet.fi/~kaiv/ecasound/history.html>. --- 4. Interface and configuration file changes * Command line options: 2.2 is backward compatible with 2.0 releases, so old scripts and .ecs files should continue to work. See ecasound(1) for more info. * Ecasound Interactive Mode (EIAM): No changes to the commands available in 2.0 releases. See ecasound-iam(1) for more info. * Library interfaces: Major changes in all library interfaces. Direct use of these libraries is no longer encouraged. The ECI and NetECI APIs are preferred for developing new applications on top of ecasound. * Ecasound Control Interface (ECI): No interface changes. * The ~/.ecasoundrc config file is no longer used. The new location is ~/.ecasound/ecasoundrc. As there's now a separate global configuration file, it is no longer necessary to duplicate all config variables in the user config files. See ecasoundrc(5) for further info. --- 5. Links and files Web sites: http://www.eca.cx http://www.eca.cx/ecasound - http://www.alsa-project.org http://jackit.sourceforge.net http://www.ladspa.org Source and binary packages: http://ecasound.seul.org/download http://ecasound.seul.org/download/ecasound-2.2.0.tar.gz Distributions with maintained ecasound support: Agnula - http://www.agnula.org Debian - http://packages.debian.org/stable/sound/ecasound.html http://packages.debian.org/unstable/sound/ecasound2.2.html DeMuDi - http://www.demudi.org FreeBSD - http://www.freebsd.org/ports/audio.html Gentoo Linux - http://www.gentoo.org PLD Linux - http://www.pld.org.pl PlanetCCRMA - http://www-ccrma.stanford.edu/planetccrma SuSE Linux - http://www.suse.de/en Note! Distributors do not necessarily provide packages for the latest ecasound version. -- http://www.eca.cx Audio software for Linux!

22 years, 11 months

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Linux-audio-user