Linux-audio-user November 2006

linux-audio-user@lists.linuxaudio.org

152 participants
150 discussions

by Lars Luthman

This is a simple applet for controlling the LASH Audio Session Handler. When you run it it will appear as a small LASH icon in your "notification area" or "system tray" (if your desktop manager is compatible with freedesktop.org's "System tray" standard, http://www.freedesktop.org/Standards/systemtray-spec). This is typically somewhere in the panel in KDE or GNOME. There is also a front end for the WindowMaker dock (or compatible window managers). Changes since 0.2.0: * A DockApp front end (thanks to Nedko Arnaudov) * A "Recent" submenu for restoring recently saved sessions * A "Connect" submenu for connecting and disconnecting JACK ports * Doubleclicking session directories in the file selection dialog restores the session instead of going into the directory * The message window is removed Get it at http://dino.nongnu.org/glashctl -- Lars Luthman - please encrypt any email sent to me if possible PGP key: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x04C77E2E Fingerprint: FCA7 C790 19B9 322D EB7A E1B3 4371 4650 04C7 7E2E

16 years, 9 months

[linux-audio-user] RE: Interview with EnergyXT Developer

by Kjetil S. Matheussen

"Ivica Ico Bukvic": > > So, if I understand this correctly, there is no API out there that simply > translates common GUI VST calls into any of the libre toolkits which are > also available on Linux, other than the full-fledged Wine implementation? If > so, that *really* sucks. > Well, probably maybe. Its hard to know what GUI toolkits closed source software use. And it doesn't matter very much either until there is a big enough marked for commercial vst plugins on linux, which might never happen because we have better standards than vst for fitted for linux audio: The trouble of getting various x toolkits to work with each other is probably more easely solved by using dssi or just making jack programs out of the plugins. Besides, ladspa is a much more supported standard than vst on linux, and for most vst plugins, it probably doesn't require that much work to make them support ladspa as well as vst. I think it boils down to vst plugin developers not having much interest in linux audio. Thats where the work needs to be done I think.

16 years, 9 months

[linux-audio-user] Linux audio sites on the www

by Mathias Friman

Hi list. In my quest for good audio related documentation for the Linux platform, several things strike me: 1. It is very scattered around the internet. 2. It has no unified structure 3. It is, in some cases, downright ugly. ;) Don't take this as critisism of webdesigning skills on a community wide basis, I know most of the people responsible for the websites have better things to do than to put days or weeks designing their content to please the eye. As everyone knows already, content is king and webdesign is for sissies. ;) However, a non-cluttered look and feel should make a newcomer more inclined to find what they seek, a link-farm of some sort would enable people to delve further into the world of linux audio and so on and so forth. It seems to me that most places throughout the Linux audio community are scattered like islands in a very big ocean with nothing to bridge them. I was thinking about a top row somewhat like the OSTG-bar on slashdot.org and the like, with maybe 6-10 of the most central sites in the linux audio community. Any rating of these sites will not be done by me, that's for sure. ;) The thought was to incorporate this bar on as many sites as possible, with a central link repository of some kind. How do you feel about such an idea? I'm willing to implement it, it there's any interest. Regards, Mathias

16 years, 9 months

[linux-audio-user] Software recommendation

by Chris McCormick

Hi All, This is a request for information about which bit(s) of software people would recommend for a particular musical workflow. I build my synthesizers in Puredata and I have an uc33 controller to do knob tweaking via midi. This Christmas my girlfriend is getting me a USB midi keyboard and I'd like to start writing some 'live' tracks using that. Puredata's strong point is not sequencing and notation, so what I need is an application that I can send midi notes and controller data through, which will remember them and pass them on to Puredata. Ideally I could go back after playing a track live, and shift notes around, modify controller envelopes etc. I am happy to do something like use vmidi loopbacks or whatever. I'm on Debian and my preference is for something that won't pull in too many wacky dependencies, but please don't let that stop you suggesting something. I use Fluxbox and mostly Gtk based apps. Thanks very much for your time! Best, Chris. ------------------- chris(a)mccormick.cx http://mccormick.cx

16 years, 10 months

[linux-audio-user] VOIP and JACK

by Esben Stien

Just reporting on status of hooking up VOIP to JACK. I'm sure there are many wondering. I found twinkle softphone to work very well with oss2jack. (I'm on linux-2.6.18-rt1). Twinkle unfortunately does not separate the UI from the core, but it's the only piece of software I've found that works. I hope we can get the LAD VOIP channel up and running again. -- Esben Stien is b0ef@e s a http://www. s t n m irc://irc. b - i . e/%23contact sip:b0ef@ e e jid:b0ef@ n n

16 years, 10 months

[linux-audio-user] Fwd: freebob problem

by Ypatios Grigoriadis

Hello list! I cannot get the freebob driver running for Edirol FA101. I compiled and installed libfreebob and jackd, but when I start jack I get the following error message: ------------------------ jackd -dfreebob -dhw:0 -r48000 -p1024 -n3 -i0 -o0 jackd 0.102.20 Copyright 2001-2005 Paul Davis and others. jackd comes with ABSOLUTELY NO WARRANTY This is free software, and you are welcome to redistribute it under certain conditions; see the file COPYING for details JACK compiled with System V SHM support. loading driver .. Freebob using Firewire port 0, node -1 FreeBoB ERR: FREEBOB: Error creating virtual device cannot load driver module freebob Segmentation fault -------------------------- The test program included by libfreebob gives the following output: ------------------------------------------------ root@YpatiosLIVE:/usr/local/src/libfreebob-1.0.0/tests# ./test-freebob discover verbose level = 0 Using freebob library version: libfreebob 1.0.0 port = 0, devices_on_bus = 1 get info for device = 0, node = 1 Direction: 0 (capture) Connection Info =============== Number of connections: 1 Connection 0 ------------- [ 0] Id: 1 [ 0] Port: 0 [ 0] Node: 1 [ 0] Plug: 0 [ 0] Dimension: 11 [ 0] Samplerate: 44100 [ 0] IsoChannel: -1 [ 0] IsMaster: 0 [ 0] Number of stream infos: 11 StreamId Position Location Format Type DPort Name -------------------------------------------------- [ 0]:[ 0] 0x01 0x01 0x06 0x02 0x00 MicIn1 left [ 0]:[ 1] 0x06 0x02 0x06 0x02 0x00 MicIn1 right [ 0]:[ 2] 0x02 0x01 0x06 0x03 0x00 LineIn 3+4 left [ 0]:[ 3] 0x07 0x02 0x06 0x03 0x00 LineIn 3+4 right [ 0]:[ 4] 0x03 0x01 0x06 0x03 0x00 LineIn 5+6 left [ 0]:[ 5] 0x08 0x02 0x06 0x03 0x00 LineIn 5+6 right [ 0]:[ 6] 0x04 0x01 0x06 0x03 0x00 LineIn 7+8 left [ 0]:[ 7] 0x09 0x02 0x06 0x03 0x00 LineIn 7+8 right [ 0]:[ 8] 0x00 0x01 0x06 0x04 0x00 SpdifIn left [ 0]:[ 9] 0x05 0x02 0x06 0x04 0x00 SpdifIn right [ 0]:[10] 0x0a 0x01 0x0d 0x0a 0x00 MidiPort_1 Direction: 1 (playback) Connection Info =============== Number of connections: 1 Connection 0 ------------- [ 0] Id: 1 [ 0] Port: 0 [ 0] Node: 1 [ 0] Plug: 0 [ 0] Dimension: 11 [ 0] Samplerate: 44100 [ 0] IsoChannel: -1 [ 0] IsMaster: 0 [ 0] Number of stream infos: 11 StreamId Position Location Format Type DPort Name -------------------------------------------------- [ 0]:[ 0] 0x01 0x01 0x06 0x03 0x00 LineOut 1+2 left [ 0]:[ 1] 0x06 0x02 0x06 0x03 0x00 LineOut 1+2 right [ 0]:[ 2] 0x02 0x01 0x06 0x03 0x00 LineOut 3+4 left [ 0]:[ 3] 0x07 0x02 0x06 0x03 0x00 LineOut 3+4 right [ 0]:[ 4] 0x03 0x01 0x06 0x03 0x00 LineOut 5+6 left [ 0]:[ 5] 0x08 0x02 0x06 0x03 0x00 LineOut 5+6 right [ 0]:[ 6] 0x04 0x01 0x06 0x03 0x00 LineOut 7+8 left [ 0]:[ 7] 0x09 0x02 0x06 0x03 0x00 LineOut 7+8 right [ 0]:[ 8] 0x00 0x01 0x06 0x04 0x00 SpdifOut left [ 0]:[ 9] 0x05 0x02 0x06 0x04 0x00 SpdifOut right [ 0]:[10] 0x0a 0x01 0x0d 0x0a 0x00 MidiPort_1 -------------------------------- Has anyone some suggestions, how to get the driver work ? Many thanks, -- Ypatios. -- Ypatios.

16 years, 10 months

[linux-audio-user] Pre-Amp hum (related to jack, somehow)

by Carlo Capocasa

The irony of this is killing me. I had a singing capacitor in my notebook computer, which I was able to solve using a load generator at a low scheduling priority. However, that same capacitor is what had triggered me to get a higher-end sound card in the first place. Now this higher end sound card has quite a loud hum when the phantom power for its mic pre-amps is on. Interestingly, when I mix the signals from both pre-amps by connecting them both to the same outputs in JACK, the noises from the Mics cancel each other out. The load generator has no influence on the hum; however, the sampling rate does. The higher the sampling rate the higher pitched the hum is. The inverse is true for buffer size: The larger the buffer, the lower pitched the hum. My current theory is this: Jack causes a surge of power in the CPU through an interrupt. This surge gets transformed into current in the grounding cable through electromagnetic induction, which in turn induces a current in the microphone pre-amps, which causes the hum. The hums can cancel each other out because... uh, not the slightest on that one. Help appreciated. Carlo

16 years, 10 months

[linux-audio-user] [ANN] xjadeo-0.4.0-rc1

by Robin Gareus

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 xjadeo-0.4.0-rc1 - X Jack Video Monitor http://xjadeo.sourceforge.net/ Xjadeo is a simple movie player that synchronizes video to an external time source such as jack transport. It is intended to aid sound composition to a video clip. This is a rewrite of the previous 0.1 release and a conclusion of the ongoing development during the last year. New Features include * displays: Xv, x11+imlib2 * fullscreen and letterbox video * improved video file reading via ffmpeg * on screen display * configuration file * LASH - session management * optional GUI - qjadeo * remote control interface * Midi Time Clock quarterframe sync * documentation * OSX support (experimental) Release Notes: Mixing ffmepg and Xv may produce unexpected effects on some architectures. Please report them as those are the main reason for this release-candidate: http://xjadeo.sourceforge.net/doc/ar01s03.html#problems Although there are many new Features, only the on-screen-display might have an impact on the perfomance of xjadeo. since 0.3.13 xjadeo uses gettimeofday(3) for it's internal timekeeping. - it appears that using clock(3) was a major-bug in the original xjadeo code, though not harmful. The default xjadeo configuration is to run with a low profile: Additional Features need to be enabled explicitly (LASH is an exception). Performance highly depends on the Codec and geometry of the video file: the -K, -k arguments allow to seek many file formats - but is intended only for preview! http://xjadeo.sourceforge.net/doc/ar01s03.html#video_formats There are open ends in osX support: This version includes workarounds for use with ffmpeg on PPC. , but they might not work for all versions of ffmpeg. - Are you an intel-mac user who succeeded to run 'make test' in the ffmpeg svn src? - give us a wink :) http://packman.links2linux.org/package/xjadeo/ provides SuSE-RPMs for i586 and also for x64-64bit. many thanks! We are pleasantly surprised, since we expected serious video-Codec and xjadeo-Xv problems for 64 bit architecture. We have not tested any of the RPMs ourselves. - imlib display + mjpeg codec should work though. A beta-devel debian package can be built from source and the xjadeo.spec.in is intended for FC4 RPMs. robin /at/ gareus /dot/ org luisgarrido /at/ users /dot/ sourceforge /dot/ net -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (GNU/Linux) iD8DBQFFb2SXeVUk8U+VK0IRAksdAJ9UzrecVjOOQuwWtCWfmh9EjggflACgga56 yTXu6ToamWx+UmNw+yyl5Dg= =HwID -----END PGP SIGNATURE-----

16 years, 10 months

[linux-audio-user] Realtiem kernel.

by J M Needham

I found http://repos.opensuse.org/home:/appleonkel/SUSE_Linux_10.1/i586/kernel-rt-d… on the internet while looking for info on how to patch a realtime kernel in suse 10.1. I'm having some problems with it (it didn't boot; I used rpm -i ... to install it) and so if anyone has any experience with this or advice for SUSE 10.1 (I'm leaving suse soon anyway -- heading to DeMuDi) then I'd appreciate. I understand that patching a kernel for suse 10.1 with a realtime patch is non-trivial. Any help appreciated. Jonty

16 years, 10 months

[linux-audio-user] alsa wiki lost changes since 2005?

by Paul Winkler

alsa.opensrc.org shows no "recent changes" in 2006. I recently spent some time updating the USB Midi page http://alsa.opensrc.org/USBMidiDevices and now it says last modified 2005 :-( I *think* my changes are on the page, but the dates are wrong? Hope it didn't lose all that work I did. Who runs that site? What happened? Any backups? -- Paul Winkler http://www.slinkp.com

16 years, 10 months

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Linux-audio-user November 2006