Linux-audio-dev

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7516 discussions

Re: [LAD] [LAU] So what's the deal with controlling the aeolus organ?stops via midi

by Pedro Lopez-Cabanillas

On Monday, October 5, 2009, Fons Adriaensen wrote: > On Mon, Oct 05, 2009 at 07:00:40PM +0200, Pedro Lopez-Cabanillas wrote: > > The MMA requires that you use a registered manufacturer ID, but only for > > commercial products. There is a special ID = 0x7D that is intended for > > educational or development use only, and should never appear in a > > commercial design. > > Where it is silently assumed that 'educational' and 'development' > implies 'not distributed', or at least 'never used together with > any other app using the same ID'. > > If two or more open source programs use 0x7D and they happen to > see the same MIDI stream then one of them will be screwed. The only devices or programs that would be screwed are those bad or poorly designed/written. In addition to the manufacturer ID, there should be enough additional bytes to uncertainly identify a particular model among others using the same manufacturer ID. The device (soft in this case) receiving a message should be able to distinguish between legitimate and spurious messages using the model ID bytes, checksums and/or some other mechanism. Regards, Pedro

16 years, 1 month

Open Keyboard: Request for velocity curve information

by Albin Stigo

Hi, Many thanks for all feedback on my original posting about what features you would like to see in an open midi controller... Based on your "requests" I've started experimenting a bit with adding rotary encoders and a 20x4 lcd display. I've changed to a more powerful (but still cheap and easy to work with) microcontroller atmega128 (from atmega16). If you're not familiar with microcontrollers you might be familiar with the arduino platform which also uses an atmega (but the lesses atmega168). Now to my question: Does anyone have some sample velocity curves, like a mapping from key velocity to midi velocity for different instruments (grand piano etc)? There doesn't seem to be any convention on how to handle velocity data?? Does some synths expect linear mapping and does the "mapping" in software?? --Albin

16 years, 1 month

4 Stereo channels ADAT on EMU1212

by technical manager

Hey everyone. I hope there is some bright minds on this mailing list who can help me. EMU1212 output 4 differen stereo signals throug ADAT plauying 4 different sound streams simultasniosly. The card is installed and alsa recognises it. aplay -l lists three devices on card 0 device 0 has 32 subdevices. device 1 is missing device 2: has 8 subdevices and is named something with FX controller Device 3 har 1 subdevice *sury i dont have the real output at the monet* In alsamixer (playback) I can select a souce for each of the 2 analog outputs and each of the 8 ADAT outputs from ADAT0-ADAT7 The sources include DSP0-DSP31 and ADAT0-ADAT7 and some more Natually i think that the 32 subdevicec in device 0 coresponed to the 32 DSP's in ALSA. But no matter which of the subdevices i try to guide mplayer ot aply through, it only plays through the sam DSP's DSp 0 and DSP1 are respectivly left and rigth channel, dsp 6 and 7 is a player e damped signal of one of dsp0 or ds1 and dsp8 is also playing one of DSP1 and 2 undamped though. the rest of the dsp's does not rout any music unless the souround volume is turned up. I Testeed this by listning on all the diferens outputs analog 1 and 2 and the 8 adat channels while chagin through the diferent sources., I can sucessfully send sound from DSP1 and or = to each of the outputs and therefor the physical output is working fine. But i am not able to use other DSP than 0 and 1 dispite what commands I give mplayer. e.q. mplayer -ao alsa:device=hw=0.0.x MUSIC_FILE I have tried combinations and all the devices device 2 and 3 returns an device error. What can I do ?

16 years, 1 month

Re: [LAD] Half speed audio playback issue

by victor

Humm, than that seems to be the reverse of what we would expect, that must be then probably because of the missing samples. If samples were not missing (say samples from the two channels got distributed between four channels) then it should go up in pitch, because each channel would run through the entire data twice as fast, similarly to what would happen if a mono file was opened as stereo. If on the other hand you were opening a stereo file as mono, then the pitch would go down (with some distortion possibly). Maybe that is what is happening, your stereo file became 4 identical mono tracks. Victor ----- Original Message ----- From: "Raymond Martin" <laseray(a)gmail.com> To: "victor" <Victor.Lazzarini(a)nuim.ie> Sent: Monday, October 05, 2009 10:39 PM Subject: Re: [LAD] Half speed audio playback issue > Hi Victor, > >> I thought something like that was happening. But I'm curious: if a >> 2-channel file is played over 4-channels it should go up an octave, >> should >> it not? You'd >> have half as much data for 4 channels as you'd have for 2 channels and so >> it would seem like it's going faster? Or my reasoning is wrong somewhere >> (it could >> well be, I often get things like that mixed up)? > > Since you have half as much data your processing (e.g., D to A conversion) > will interpret this as being at half the rate. Perhaps like it seeing > every > second sample, with a blank one in between them, that could lead to > interpolation that results in a signal at half the frequency. Sort of like > every second sample is missing (in my case, two of every four are going > to unused channels). I'm not too fresh on the details presently, but it > is something this is easy to find mentioned in a standard DSP book. > > Best regards, > > Raymond

16 years, 1 month

[ANN] Csound 5.11

by victor

Hi everyone, Just a word to say that Csound 5.11 is out now. Here is John ffitch's official announcement. Victor ====================================================== many of you may have heard the rumours, but it is true, Csound 5.11 is now released and available from Sourceforge The release notes are below; the notes at SF are missing GEN49 So, on with 5.12; we await the requests with interest... ==John ffitch ------------------------------------------------------------------------ Notes for 5.11 ============== New Opcodes: tabsum to sum sections of ftables p5glove -- not working very well yet MixerSetLevel_i -- an init-time only version of MixerSetLevel wiimote opcodes to allow games controller to be read directly in Csound. mp3in -- like diskin but reads MP3 files doppler -- details to follow filebit -- reports bit size of files New Gen: None (well actually there is a gen49 to read mp3 files) Modified Opcodes and Gens: Added rounding bin code to pvsscale Added NP2 support for ftload and ftsave GEN23 totally rewritten to be more consistent in what constitutes a separator and comments. (Still no /* */ comments) Bugs fixed: Use of automatic numbering of ftables reuses table numbers seed with positive argument was wrong sprints with an empty string printed wrong data mute now works with both numeric and named instruments Comments in new parser fixed Byteorder in loading files fixed Small fixes in diskin, and in tablexkt System Changes: Revised Windows installer SConstruct now builds completely independent shared libraries for Python, Lua, and Java wrappers. New Parser almost usable Redrawing of graphs fixed so that only selected ones get redrawn. RT-alsa more forgiving on near sample rates It is possible to have the score generated by an external program rather than using standard score format using <CScore bin="translater"> to call the program translater on the score data lpc_export fixed Removed limit on macro names length PMAX, the number of arguments to a score event has been reduced by 2, and an overflow system introduced so GENs can have arbitrary numbers of arguments. API: Increased API version to 2.1. New API function pointer ldmemfile2withCB() which is a version of ldmemfile() allowing a callback to be set and called exactly once to process the MEMFIL buffer after it is loaded. csound->floatsize set; zero in earlier versions GetChannelLock added Internal: usual collection of gratuitous minor changes, layout and comments *end*

16 years, 1 month

[ANN] QjackCtl 0.3.5 slipped away!

by Rui Nuno Capela

A classic needs no introduction. QjackCtl 0.3.5 slipped away! Website: http://qjackctl.sourceforge.net Project page: http://sourceforge.net/projects/qjackctl Downloads: - source tarball: http://downloads.sourceforge.net/qjackctl/qjackctl-0.3.5.tar.gz - source package (openSUSE 11.1): http://downloads.sourceforge.net/qjackctl/qjackctl-0.3.5-1.rncbc.suse111.sr… - binary packages (openSUSE 11.1): http://downloads.sourceforge.net/qjackctl/qjackctl-0.3.5-1.rncbc.suse111.i5… http://downloads.sourceforge.net/qjackctl/qjackctl-0.3.5-1.rncbc.suse111.x8… - binary packages (Ubuntu 8.04 LTS): http://downloads.sourceforge.net/qjackctl/qjackctl_0.3.5-1.rncbc.ubuntu804_… http://downloads.sourceforge.net/qjackctl/qjackctl_0.3.5-1.rncbc.ubuntu804_… - binary packages (Ubuntu 9.04): http://downloads.sourceforge.net/qjackctl/qjackctl_0.3.5-1.rncbc.ubuntu904_… http://downloads.sourceforge.net/qjackctl/qjackctl_0.3.5-1.rncbc.ubuntu904_… Weblog (upstream support): http://www.rncbc.org License: QjackCtl is free, open-source software, distributed under the terms of the GNU General Public License (GPL) version 2 or later. Change-log: - Late support for UTF-8 encoded client/port names. - Allow only one single patchbay connection to or from an exclusive socket (mitigating bug #2859119). - Automatic crash-dump reports, debugger stack-traces (gdb), back-traces, whatever, are being introduced as a brand new configure option (--enable-stacktrace) and default enabled on debug build targets (--enable-debug). - Probable fix on the audio connections with regard to client/port (re)name changes (an ancient bug reported by Fons Adriaensen). - Portaudio device selector is now available (after a patch handed by Torben Hohn and Stephane Letz). - A couple of primitive D-Bus interface slots have been introduced, giving the option to start/stop the jackd server from the system bus eg. via dbus-send --system / org.rncbc.qjackctl.start (.stop), (a nice addition supplied by Robin Gareus, thanks). - New command line option (-a, --active-patchbay=[path]) to specify and activate a given patchbay definition file (a simple patch sent by John Schneiderman, thanks). - Added one significant digit to DSP Load percentage status display. - Tentative support for netjack (slave) by adding the "net" driver to the existing backend driver options on the Setup/Settings section. - Converted obsolete QMessageBox forms to standard buttons. - New patchbay snapshot now raises the dirty flag and allows for the immediate salvage of patchbay definition profile. - Conditional build for JACK port aliases support (JACK >= 0.109.2). - Alternate icon sizes other than default 16x16, are now effective to the Connections widget (Setup/Dislay/Connections Window/Icon size). Enjoy, -- rncbc aka Rui Nuno Capela rncbc at rncbc dot org http://www.rncbc.org

16 years, 1 month

jack-rack feature request

by Renato

Hello, I've sent this email in July on the jack-rack-devel list but haven't got response... I'm posting it here in the hope of some dev to take up this idea, which IMHO is really missing from jack-rack and would take it a step further. [jack-rack-devel] feature request: preset change through midi From: Renato Budinich <rennabh@gm...> - 2009-07-17 08:37 hello, It would be great if it were possible to browse saved presets from a separate window, and sending midi program changes to go up or down the list. (the window is actually a detail, what i think is really missing is the possibility to change presets from say a pedal board if one is occupied playing an instrument) for the rest i think jack-rack is great! Great midi implementation Renato

16 years, 1 month

interesting blog post about syncing blender and ardour

by Jörn Nettingsmeier

http://www.jpbouza.com.ar/ESP2/tutoriales/gnulinux/blenderardour/id/en

16 years, 1 month

FFADO Contact Needed

by alex tinsley

Hi, I have tried the contact form on the FFADO website and through the email address provided in the contact pages at the SourceForge.net project page to no avail. I'm not sure where else to ask except here. Are any of the FFADO developers on this email group that can provide a contact email that will garner a response? Thanks, Alex -- When you gotta have it, you gotta have it. Lesson learned from days of record shopping.

16 years, 1 month

"Open midi-keyboard"

by Albin Stigo

Hi, I'm new to the list so I hope this is not the wrong forum! I've been working on a midi keyboard ("physical" hardware 88-keys "professional" = no toy) for a while for which I plan to release the schematics and source as open source. It's based around a Fatar keybed (they make Studiologic) and an Atmel AVR mcu. The code is all in C and is very portable. Current features are: - Velocity sensitivity. - Pedal support. - Custom velocity curves. - Only normal MIDI serial "current" link. No USB, yet... My questions are, Is there an interest in this sort of thing..? What features would you like to see, what are you missing from off-the-shelf products? Atb, Albin

16 years, 1 month

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Linux-audio-dev