Linux-audio-dev

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7516 discussions

[linux-audio-dev] PPC Linux, precision timing problem

by Robert Jonsson

Hi, Another RTC question that is absolutely unrelated to the other one (promise ;-). Been poking at a PPC based linux system lately. Now, if I've been correctly informed (and my photagrafik memory isn't playing tricks on me) the Apple PPC platforms lacks an RTC compatible device. Major stumbling block... how does one accomplish an high resolution timer in this environment, any ideas? What does a Mac use? Regards, Robert -- http://spamatica.se/music/

20 years, 11 months

[linux-audio-dev] ANNOUNCE: Polypaudio 0.7

by Lennart Poettering

Hi! I am proud to announce Polypaudio 0.7. Changes are too many to count (nearly every single file was touched since 0.6) An excerpt: - ability to publish credentials in X11 root window (like arts does) - IPv6 support - Esound backend (use polypaudio on top of an esound daemon) - excessive commenting - new tool pacmd - integer only resampler (use this if you have a slow CPU without much FP power. The quality is quite bad, but it is fast) - real support for ulaw/alaw - tons and tons of cleanups and fixes - new command "load-sample-dir-lazy" paman 0.6, pavumeter 0.4 and xmms-polyp 0.5 have been released as well. Drivers for libao, Xine, MPlayer, GStreamer are available in their respective upstream CVS or SVN servers. The PortAudio driver is still in the works. Lennart -- name { Lennart Poettering } loc { Hamburg - Germany } mail { mzft (at) 0pointer (dot) de } gpg { 1A015CC4 } www { http://0pointer.de/lennart/ } icq# { 11060553 }

20 years, 11 months

[linux-audio-dev] ANNOUNCE: QjackCtl 0.2.13 released!

by Rui Nuno Capela

Hi everyone, Simply put: QjackCtl 0.2.13 has been released! This is yet another dot-release, nothing outstanding. Taken straight from the ChangeLog: - Main window is now properly minimized instead of simply hidden when the system tray icon is not available nor opted in (as suggested by Florian Schmidt). - Some informational status items are now updated 10 times less frequently (e.g. CPU Load, Sample Rate, Buffer Size, Realtime Mode, etc.), lowering the CPU burden of most probably redundant status updates. - XRUN detection and statistics are being conditionally included if jack_get_xrun_delayed_usecs() is available (as of JACK 0.99.7+ CVS). - Fixed ancient bug on client shutdown event handling, which was invoking the xrun notification handler by mistake. - Support for maximum scheduling delay status added (EXPERIMENTAL); this relies on jack_get_max_delayed_usecs() function availability at configure time, depending on a Lee Revell's non-official JACK patch. - Patchbay Activate button is now a toggle button widget, allowing the deactivation of the current patchbay profile. - Reset-status icon has been changed to a simple red circle instead of previous one which was much like a power-switch symbol. - Preset selection has been added to the context menu. Check it out from the usua place: http://qjackctl.sourceforge.net Enjoy. -- rncbc aka Rui Nuno Capela rncbc(a)rncbc.org

20 years, 11 months

[linux-audio-dev] 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

20 years, 11 months

[linux-audio-dev] Tascam US428 Hangup

by Spencer Russell

Hullo, there, I've got a Tascam us428 audio/midi interface/control surface, and I've had a heck of a time trying to get it working. It seems to work alright if I use the device directly with xmms, but when I try to start jack, my system hangs. Sometimes it waits a while before hanging, sometimes it stops immediately when I start jack. I happed to have a tail -f of syslog running this most recent time, and noticed that at the same time it stopped working, the message: kernel: ALSA: ../../alsa-kernel/usb/usx2y/usbusx2yaudio.c: \ 205: -11 came up. Looking at that file in the source, the error happens in function usX2Y_urb_submit(). Here's the line: ... if ((err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) { snd_printk("%i\n", err); <-- This is line 205 return err; } ... I have only basic programming skills, and to me it seems like the function is doing exactly what it's supposed to be doing, and printing the error code -11. But I have no idea what that means, or I could be completely wrong. I'm using kernel version 2.4.26 with the low latency and preemption patches. Thanks for any help. spencer

20 years, 11 months

[linux-audio-dev] cannot set tick on /dev/rtc: Inappropriate ioctl for device

by Robert Jonsson

Hi guys, Trying to move to a 2.6 kernel here. More specifically I've tried the kernel bundled with Mandrake10.1. I'm not expecting any lowlatency miracles but I was expecting it to "work". The error I get is (when starting MusE which needs RTC): cannot set tick on /dev/rtc: Inappropriate ioctl for device rtc is there. Apparently something is wrong with it. I googled a bit and it seems this has been up here before, with other kernels, so it doesn't seem like an Mandrake issue. Anybody know what this is and what to do about it? /Robert -- http://spamatica.se/music/

20 years, 11 months

[linux-audio-dev] anyone interested to develop a new apps ?

by dubphil＠free.fr

Hello, I want to setup a sound system with linux. For this, I need an app that could split an audio file in four tracks in order to add them separately some effects. I tried to achieve this using Jamin which have this kind of "Crossover" functionnality, but it is defenetly not usable for what I need. The ideal application should not be too complex : it should be compatible with Jack and could just get a stereo channel for input and provides 4 stereo channels. The 4 stereo channels would be the result off a crossover spliting by frequency ranges of the input stereo channel. we could give a default preset like this : 1st stereo channel : low 2nd stereo channel : low-mid 3rd stereo channel : high-mid 4th stereo channel : high of course thoose ranges should also be set manually. each channel could have the gain controlled and could have assigned 4 effects with LADSPA plug-ins. each slider or knob should be midi controlled (I know that Jack Rack already does this). Does this kind of apps should take a long time to be developped ? I'm not skilled to undergo this kind of project alone as I'm a poor PHP/Perl and little Python developper. Anyone interested for this kind of project ? Kind regards Philippe

20 years, 11 months

[linux-audio-dev] Re: [Alsa-devel] Firewire Audio Card Support

by Lee Revell

On Thu, 2004-11-18 at 16:09 +0100, Giuliano Pochini wrote: > No, it's not hard because there are a lot of skilled people around, but > the card would be expensive. There was a thread about a project of "open > source" graphic card recently on lkml. And I posted a [possibly OT] rant to that thread about how this was a waste of time and how you could REALLY make a killing with open sound hardware. http://lkml.org/lkml/2004/10/23/292 I got one "right on, brother" response via private mail and that was it. But then again half the kernel guys don't have sound cards in their machines ;-) Lee

20 years, 11 months

[linux-audio-dev] TAP Plugin pull-down menu problems

by Doug McLain

Using CVS tap-plugins and cvs ardour, I cannot select any of the other reverb styles in Reverberator, and maybe only one or two of the choices in mono Dynamics. Sorry for cross posting but I'm not sure if it's a plugin or ardour issue :) Doug -- http://nostar.isa-geek.com/

20 years, 11 months

[linux-audio-dev] [ANN] liblo 0.15

by Steve Harris

liblo is an implementation of the Open Sound Control[1] protocol for POSIX systems. It is written in ANSI C and released under the GNU General Public Licence. It is designed to make developing OSC applictions as easy as possible. http://plugin.org.uk/liblo/ This release adds some OSX compatibility fixes from Taybin Rutkin, support for OSC multipath pattern matching courtesy of Daniel Holth's pattern matcher and I've added bundle i/o. Liblo now implements everything in the OSC specification except type arrays. Pattern matching and bundles are largly untested, and should be treated as alpha quality, but should work. If you are using server threads or the nonblock API then bundles should JustWork(TM), if you are polling on the server fd then you have some work to do. There are API calls for detecting if/when there are scheduled messages. - Steve [1] http://www.cnmat.berkeley.edu/OpenSoundControl/

20 years, 11 months

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Linux-audio-dev