Linux-audio-user April 2009

linux-audio-user@lists.linuxaudio.org

112 participants
101 discussions

[LAU] Travel from Milan Malpensa to Parma on wednesday evening

by Pieter Palmers

Hi all, I seem to have put myself in a brilliant position... My flight lands at 22:30 in Milan Malpensa airport, meaning that I can't make the last train from Milan to Parma. I have two possibilities: either stay a night in Milan and take the morning train, or rent a car in Malpensa, drive it to Parma and drop of it there the next morning. I've done the accounting for both scenario's, and the first one would come down to 100eur, while the car rental would set me back about 120 eur. Therefore I'm probably going to rent the car as it saves me a lot of hassle. But before booking it, I'm wondering if there are other people that might have the same issue. If so, a split fee would make things even more interesting (at least for me ;). Greets, Pieter

16 years, 10 months

[LAU] accessing hdsp mixer with amixer

by Andrew Gaydenko

On Sunday 12 April 2009 01:10:09 you wrote: > Andrew, > > > > > To have some reserve in volume I set amplifier's volume regulator > > > > higher than, say, is needed at current moment. As a result I have > > > > software level noticeably below 100%. I suppose such software volume > > > > regulating eats samples resolution (and, at least theoretically, > > > > sometimes I have, say, 12-13 bits rather 16). > > > > > > If you use the hdsp's matrix mixer, it will render the volume with > > > higher precision than 16 bits, so play back unattenuated and control > > > the output level in the matrix mixer. > > > > How to deal with the mixer (output channels) via CLI? > > amixer. > > > Flo Florian, Yes, I see amixer must be used. The proble is, hdsp driver maps card's mixer controls to alsa mixer controls in not-obvious way.There was somewhere some information about accessing hdsp mixer controls (how to relate channels and appropriate controls, write (and read?) values and such), but I can not found it now (probably it was at old alsa site). The card has numid=5,iface=HWDEP,name='Mixer' control, and, probably, something like amixer cset numid=5 x,y,z must be used. What are those x, y, z? :-) OTOH, it seems like I can not get current hdsp mixer settings: 'amixer cget numid=5' just returns a tuple with three zero rather full 3dim matrix. Can I? Has anybody elaborated information about all these issues? Andrew -------------------------------------------------------

16 years, 10 months

[LAU] hdsp, mpd and lyrcing

by Andrew Gaydenko

Hi! For "lirc-ized" playing back I use mpd CLI client. As far as hdsp driver hasn't common "Master Volume" (or such) alsa control, I use mpd's "software" volume leveling, so lirc commands are directed to CLI mpd client. To have some reserve in volume I set amplifier's volume regulator higher than, say, is needed at current moment. As a result I have software level noticeably below 100%. I suppose such software volume regulating eats samples resolution (and, at least theoretically, sometimes I have, say, 12-13 bits rather 16). Am I right? If "yes" - are there ways to use lirc to set a volume level more directly communicating with hdsp driver via CLI? Will such way keep sample accuracy?

16 years, 10 months

Re: [LAU] [Rosegarden-user] timing penalty?

by alex stone

Chris, no problem for you. I'm talking and asking about performance timing at data level across multiple apps, not the port structure itself. Jackmidi does show alsa ports when it's in seq, so no problem there aside from the renaming challenge, in qjackctl at least. So you can keep right on enjoying yourself. :) Alex. On Sat, Apr 11, 2009 at 11:28 PM, Christopher Cherrett <stuff(a)trackingsolutions.ca> wrote: > I thought that the newest jack will create jack midi ports out of alsa midi > ports for you if the driver was set to seq. > > I really hope this does not pose a problem for me as I am almost finished > putting in the interface for program and bank changes on the fly. The only > thing left to do is finish the new ruler that will visually indicate where > the program changes are. > > Are you running program changes on multiple tracks? Or is this just > happening on one track? > > -------- Original Message -------- > Subject: [Rosegarden-user] timing penalty? > From: alex stone <compose59(a)gmail.com> > To: rosegarden-user <rosegarden-user(a)lists.sourceforge.net>, LAU Mail List > <linux-audio-user(a)lists.linuxaudio.org> > Date: 04/11/09 12:30 >> >> I've been conducting a couple of experiments related to timing, and in >> particular a rapid program change sequence, between Rosegarden, using >> Alsamidi, through A2jmidid, to Linuxsampler. >> >> 1.) When i use alsamidi in both RG and LS, timing is reasonable, but i >> get the occasional blip if too many PChanges happen in quick >> succession. (And as a relative scale, we're talking about a sequence >> of 1/64 notes, with a PC for each one, and additional volume CC >> changes as well, at about 140 bpm.) >> >> 2.) When i use alsamidi in RG, and a2jmidid through to LS jackmidi, >> timing has improved, but still the occasional missed PC. >> >> >> So using a2jmidid seems to be a step forward, but my question is, is >> there a 'penalty' of some sort for using it in bridging format, and if >> so, what is it? >> >> >> 3.) When i use jackmidi native apps, running Muse and LS, for >> example, the timing is good, and i don't seem to miss fewer PChanges. >> >> (Which doesn't mean i'm giving up on RG. It has too many essential >> tools that help me workflow wise.) >> >> >> Final Question. >> If we use an RT kernel (which i am, being 2.6.29-RT in 64studio 3.0), >> with 1024HZ (or higher) for timing, what can we do after that, in >> jack, a2jmidid, RG, LS, etc.., to ensure that midi timing (Alsa or >> Jack) is pristine, and the combination of apps has the best change of >> coping with rapid, and high volume, midi data being sent? >> >> I'm trying to finesse the midi timing and midi data management across >> the board, and get it as good as possible. (It's already good. This is >> about the....extra 10%.) >> >> I'm definitely in favour of using jackmidi based on my modest and >> subjective experience, but i'd like to stick with RG for the power of >> it's toolset for workflow. (Plus a thousand other good reasons to use >> it.) >> >> So if anyone has ideas, and tips, on raising the midi data flow >> precision in transistion between the above apps, and tips or compile >> flags to do this at build time, or runtime, i'd appreciate some >> insight. >> >> I've applied the usual tweaks across all the apps, and have Jack >> running at 128/2/48000, with no xruns during normal operation. >> >> Alex. >> >> 64studio 64bit 3.0 (beta 3), on an AMD64 5600+ dual core, with 4GB ram. >> M-Audio Delta 44 soundcard. >> >> >> Parchment Studios (It started as a joke...) >> >> >> ------------------------------------------------------------------------------ >> This SF.net email is sponsored by: >> High Quality Requirements in a Collaborative Environment. >> Download a free trial of Rational Requirements Composer Now! >> http://p.sf.net/sfu/www-ibm-com >> _______________________________________________ >> Rosegarden-user mailing list >> Rosegarden-user(a)lists.sourceforge.net - use the link below to unsubscribe >> https://lists.sourceforge.net/lists/listinfo/rosegarden-user >> > > > -- Parchment Studios (It started as a joke...)

16 years, 10 months

[LAU] timing penalty?

by alex stone

I've been conducting a couple of experiments related to timing, and in particular a rapid program change sequence, between Rosegarden, using Alsamidi, through A2jmidid, to Linuxsampler. 1.) When i use alsamidi in both RG and LS, timing is reasonable, but i get the occasional blip if too many PChanges happen in quick succession. (And as a relative scale, we're talking about a sequence of 1/64 notes, with a PC for each one, and additional volume CC changes as well, at about 140 bpm.) 2.) When i use alsamidi in RG, and a2jmidid through to LS jackmidi, timing has improved, but still the occasional missed PC. So using a2jmidid seems to be a step forward, but my question is, is there a 'penalty' of some sort for using it in bridging format, and if so, what is it? 3.) When i use jackmidi native apps, running Muse and LS, for example, the timing is good, and i don't seem to miss fewer PChanges. (Which doesn't mean i'm giving up on RG. It has too many essential tools that help me workflow wise.) Final Question. If we use an RT kernel (which i am, being 2.6.29-RT in 64studio 3.0), with 1024HZ (or higher) for timing, what can we do after that, in jack, a2jmidid, RG, LS, etc.., to ensure that midi timing (Alsa or Jack) is pristine, and the combination of apps has the best change of coping with rapid, and high volume, midi data being sent? I'm trying to finesse the midi timing and midi data management across the board, and get it as good as possible. (It's already good. This is about the....extra 10%.) I'm definitely in favour of using jackmidi based on my modest and subjective experience, but i'd like to stick with RG for the power of it's toolset for workflow. (Plus a thousand other good reasons to use it.) So if anyone has ideas, and tips, on raising the midi data flow precision in transistion between the above apps, and tips or compile flags to do this at build time, or runtime, i'd appreciate some insight. I've applied the usual tweaks across all the apps, and have Jack running at 128/2/48000, with no xruns during normal operation. Alex. 64studio 64bit 3.0 (beta 3), on an AMD64 5600+ dual core, with 4GB ram. M-Audio Delta 44 soundcard. Parchment Studios (It started as a joke...)

16 years, 10 months

[LAU] xjadeo on Debian

by Grammostola Rosea

Hi, I tried to compile Xjadeo on Debian, but I got: xjadeo 0.4.6 - Configuration Report ------------------------------------------------------------------------ prefix: /usr/local exec-prefix: ${prefix} install path: ${exec_prefix}/bin System wide config: ${prefix}/etc/xjadeorc Video Displays - libxv: ok - libx11/imlib2: not avail. MIDI: alsa LASH: ok POSIX msg queue: ok On screen display: - freetype: ok - default font: - GUI: QT4 build contib/*: no. now type 'make'; followed by 'make install' as root. d@debianstudio32:~/2home/xjadeo-0.4.6$ make make all-recursive make[1]: Map '/home/d/2home/xjadeo-0.4.6' wordt binnengegaan Making all in src make[2]: Map '/home/d/2home/xjadeo-0.4.6/src' wordt binnengegaan Making all in xjadeo make[3]: Map '/home/d/2home/xjadeo-0.4.6/src/xjadeo' wordt binnengegaan make all-am make[4]: Map '/home/d/2home/xjadeo-0.4.6/src/xjadeo' wordt binnengegaan gcc -DHAVE_CONFIG_H -I. -I../.. -Wall -g -O3 -I/usr/include/ffmpeg -I/usr/include/ffmpeg//libavcodec -I/usr/include/ffmpeg//libavformat -I/usr/include/ffmpeg//libavutil -I/usr/include/ffmpeg//libswscale -I/usr/include/freetype2 -I/usr/include/lash-1.0 -I/usr/include/alsa "-DSUBVERSION=\"exported\"" -g -O2 -MT xjadeo-xjadeo.o -MD -MP -MF .deps/xjadeo-xjadeo.Tpo -c -o xjadeo-xjadeo.o `test -f 'xjadeo.c' || echo './'`xjadeo.c xjadeo.c: In function ‘render_empty_frame’: xjadeo.c:451: error: ‘PIX_FMT_RGBA32’ undeclared (first use in this function) xjadeo.c:451: error: (Each undeclared identifier is reported only once xjadeo.c:451: error: for each function it appears in.) xjadeo.c: In function ‘display_frame’: xjadeo.c:672: warning: implicit declaration of function ‘img_convert’ make[4]: *** [xjadeo-xjadeo.o] Fout 1 make[4]: Map '/home/d/2home/xjadeo-0.4.6/src/xjadeo' wordt verlaten make[3]: *** [all] Fout 2 make[3]: Map '/home/d/2home/xjadeo-0.4.6/src/xjadeo' wordt verlaten make[2]: *** [all-recursive] Fout 1 make[2]: Map '/home/d/2home/xjadeo-0.4.6/src' wordt verlaten make[1]: *** [all-recursive] Fout 1 make[1]: Map '/home/d/2home/xjadeo-0.4.6' wordt verlaten make: *** [all] Fout 2 Help would be nice. \r

16 years, 10 months

[LAU] The courses that the students take during their Music Technology Education

by Arda Eden

Hi There, Here in Turkey, music technology education is mostly associated with recording, mixing and other studio applications. As I get from those mail lists, outside Turkey music technology (at the universities of course) is mostly interested in creating the technology rather using it. There are 4 or 5 music technology departments at different universities here in Turkey. It seems like the philosophy is not grabbed in a correct way because all has dissimilar course programs. Only my department gives courses like Csound, Programming Languages, Sound Synthesis etc. along with studio applications. Rest of the departments just focus on studio stuff. So, I need to publish a paper about music technology formation all around the world which I can adapt it here in Turkey. I just need your help in that way: 1) Personal ideas about my problem above. 2) The course programs (or just the names of the courses) of the departments that you're working at. 3) The qualification requirements of the student candidates. Although it looks like this mail mostly concerns the university men, everybody is welcome. If any document files need to be attached you can mail me to ardaeden(a)gmail.com Thanks for your help. -- Arda EDEN Cumhuriyet University Faculty of Fine Arts Department of Music Technology Sivas/TURKEY

16 years, 10 months

[LAU] how to record Gramophone?

by Grammostola Rosea

Hi, My dads want to records some old gramophone records. How can he do it? Ardour/ Audacity? \r

16 years, 10 months

[LAU] building kenvycontrol

by Grammostola Rosea

Hi, I want to try kenvy24control, http://kenvy24.wiki.sourceforge.net/ but I can't install it: kenvy24-1.2-src/build$ cmake .. CMake Error at /usr/share/cmake-2.6/Modules/FindKDE4.cmake:84 (MESSAGE): ERROR: cmake/modules/FindKDE4Internal.cmake not found in /home/d/.kde/share/apps;/usr/share/kde4/apps Call Stack (most recent call first): CMakeLists.txt:5 (find_package) CMake Warning (dev) in CMakeLists.txt: No cmake_minimum_required command is present. A line of code such as cmake_minimum_required(VERSION 2.6) should be added at the top of the file. The version specified may be lower if you wish to support older CMake versions for this project. For more information run "cmake --help-policy CMP0000". This warning is for project developers. Use -Wno-dev to suppress it. -- Configuring incomplete, errors occurred! I've cmake 2.6 installed.. \r

16 years, 10 months

[LAU] how record electric guitar?

by Grammostola Rosea

Hi, I want to record electric guitar chord progression. I've an: - epiphone les paul - little amp, orange 30r - maudio dmp 3 preamp - shure 58a beta - mic stand What do you prefer, preamp of mic in front of amp? How do you manage the gain and eq? - guitar - amp - preamp - ardour How do you mix it? I've read that it is useful to use an low-pass filter, some compression and EQ. What are good plugins on GNU/Linux for this? What goes pre- and what postfader? Thanks in advance, \r

16 years, 10 months

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Linux-audio-user April 2009