Linux-audio-dev June 2006

linux-audio-dev@lists.linuxaudio.org

70 participants
59 discussions

by Thomas Vecchione

Ok I apologize as this wont deal specificly with Linux, but I am working on a program that will be deployed on Qtopia I hope on a PDA, along with used on all three desktop platforms, so I suppose it qualifies;) The problem is that I am trying to develop it on my Mac which is all I have with me at the moment(My linux machine is at my house which I wont be at for several months while I work a gig out elsewhere). I am having problems getting Qt working correctly on the Mac, after a fair amount of work I think I finally got it to the point where it should be working, but it seems to be having problems with my version of the Mac OS and I figured I would toss it out here to see if anyone could help... This is a simple hello world application to confirm Qt is working... > Kraken:~/Documents/Code/HelloWorld seablade$ makec++ -c -pipe -g -Wall > -W -F/usr/local/Trolltech/Qt-4.1.3/lib -D__USE_WS_X11__ -DQT_GUI_LIB > -DQT_CORE_LIB -DQT_SHARED > -I/usr/local/Trolltech/Qt-4.1.3/mkspecs/darwin-g++ -I. > -I/usr/local/Trolltech/Qt-4.1.3/lib/QtCore.framework/Versions/4.0/Headers > -I/usr/local/Trolltech/Qt-4.1.3/include/QtCore > -I/usr/local/Trolltech/Qt-4.1.3/lib/QtGui.framework/Versions/4.0/Headers > -I/usr/local/Trolltech/Qt-4.1.3/include/QtGui > -I/usr/local/Trolltech/Qt-4.1.3/include -I. -I. -I. > -I/usr/local/include -o hello.o hello.cpp > In file included from > /usr/local/Trolltech/Qt-4.1.3/include/QtCore/qnamespace.h:27, > from > /usr/local/Trolltech/Qt-4.1.3/include/QtCore/qobjectdefs.h:27, > from > /usr/local/Trolltech/Qt-4.1.3/include/QtCore/qobject.h:29, > from > /usr/local/Trolltech/Qt-4.1.3/include/QtCore/qcoreapplication.h:27, > from > /usr/local/Trolltech/Qt-4.1.3/lib/QtGui.framework/Versions/4.0/Headers/QApplication.h:27, > from hello.cpp:1: > /usr/local/Trolltech/Qt-4.1.3/include/QtCore/qglobal.h: In function `int > qMacVersion()': > /usr/local/Trolltech/Qt-4.1.3/include/QtCore/qglobal.h:1038: error: ` > MacintoshVersion' is not a member of type `QSysInfo' > make: *** [hello.o] Error 1 Nothing wrong in the code that I wrote, but it seems to be having problems with the Mac Version, and I am not sure if there was some variable or something I missed setting? For some reason I always have much better luck developing on Linux than on either Windows or Mac... grr. Seablade

18 years, 11 months

[linux-audio-dev] Anyone wanna take over Shelljam?

by Carlo Capocasa

Well, I went down and write the kind of software only a musician could write, perfectly adapted to a musican's needs because the author is, himself, a musician. Unfortunately, those needs dwindled, as I spent so much time writing software I didn't have any time to make music anymore. So here's a brillintly conceived and hitherto well-executed program (I spend nights figuring out the simplest way to accomplish the task at hand, meticulously making use of advanced C++ features, and carefully selecting only the best and most-updated of libraries). Now I know this is some stuff people will want to use. Unfortunately, using the thing's a little like eating fried zucchini only half fried, of having a rare steak when all you can take is well done. (Not a bad joke for a vegan, huh?) I have to offer: * A convenient framework that is tested and works. It tickles high fidelity performance that I would not hesitate to use in professional production out of your cheap old $10 computer keyboard through the use of a smart little filtering algorithm. Using it, I have created the most amazing sounds with ZynAddSubFX that I have heard to date, with extremely little overhead. (Credit goes to Paul of course, I just the thing a little I/O voodoo and dynamics) * Using an input library platfrom that ALREADY HAS implementations for all major windowing systems (including X11, native Mac, DirectFB for the handheld people as well as some direct palm support). With this thing eventually we will be using our our old palm pilots (or some version thereof that includes WLAN) to remotely control our synths. Also, if your inclination is to write something low level, thousands of users will benefit from your work because you will code it not only for an obscure music program but for a true Swiss Army Knife of I/O. Very friendly developers and excellent recency of files. * Using THE very best real-time cross-platform MIDI library. Very easy to use, much easier than native ALSA and just as fast. Very portable, al through! * Ready road map adjusted perfectly to a real musician's needs in professional production and performance. Be the man who made the star! Features: * Extremely accurate (<15 CPU cycles) response keyboard stroke to MIDI converter * Even more accurate Mouse to MIDI controller message converter * Cheap keyboard support through elegant filter * Extremely portable * Very easy-to-use and widely supported hardware abstraction layer used * Excellent portable real time MIDI library used from the famous STK audio toolkit from the University of Columbia * Rock solid stable * Keyboard layout geared towards live performance * Project page set up and ready to use, account data waiting for transfer * Keystrokes read directly from hardware, no complexity through keymap localization * Support for text mode Possibilitites for extension: * XML based custom keymaps * keymap creation and loading GUI * friendly, untuitive libggi based GUI during play * 'non-blocking' libgii keyboard driver for testing a synth while manipulating parameters I have a clear vision of this project and remain available for consultation. Have fun with it guys! Eat up! Carlo

18 years, 11 months

[linux-audio-dev] [ANN] Csound 5.02 release

by Istvan Varga

Links to downloadable packages can be found here: http://csound.sourceforge.net/ Changes in version 5.02: 2006-06-04 Michael Gogins <gogins(a)pipeline.com> * Changed the MIDI interoperability opcodes (OOps/midiinterop.c) midinoteoncps, midinoteonoct, midinoteonpch to leave key and velocity unchanged for score-driven performance. 2006-06-04 Istvan Varga <ivarga(a)csounds.com> * Engine/otran.c: work around constndx() not being compiled correctly 2006-06-03 Istvan Varga <ivarga(a)csounds.com> * Engine/fgens.c, InOut/libsnd_u.c, OOps/diskin.c, OOps/diskin2.c: GEN01, diskin, diskin2, soundin: with an iformat value of -1, reject headerless files, rather than assuming the same format as the one specified on the command line GEN01: added format codes 7 (8 bit unsigned), 8 (24 bit), and 9 (doubles) * Engine/entry1.c, H/sndinfUG.h, OOps/sndinfUG.c: filelen, filenchnls, filesr: added optional i-time argument that defaults to 1, and if zero, will make the opcodes return zero on headerless files rather than some possibly incorrect defaults * Opcodes/fout.c: fixed bug in fini opcode (negative numbers were read incorrectly) * Engine/sread.c, Engine/swrite.c, Engine/twarp.c: fixes to reading numbers in [] score expressions fixed 's' and 'e' score opcodes with time parameter 2006-06-02 Istvan Varga <ivarga(a)csounds.com> * New string opcodes: Sdst strsub Ssrc[, istart[, iend]] Sdst strsubk Ssrc, kstart, kend ichr strchar Sstr[, ipos] kchr strchark Sstr[, kpos] ilen strlen Sstr klen strlenk Sstr Sdst strupper Ssrc Sdst strupperk Ssrc Sdst strlower Ssrc Sdst strlowerk Ssrc Sval getcfg iopt ipos strindex Sstr1, Sstr2 kpos strindexk Sstr1, Sstr2 ipos strrindex Sstr1, Sstr2 kpos strrindexk Sstr1, Sstr2 * Engine/express.c, Engine/otran.c: fixed parsing of numbers in exponential notation also some parser fixes related to 0dbfs 2006-06-01 Istvan Varga <ivarga(a)csounds.com> * Added callback interface to the software bus with named channels, using new opcodes chnrecv and chnsend. The callback function can be set with csoundSetChannelIOCallback(). 2006-05-31 jpff <jpff(a)codemist.co.uk> * util/sndinfo.c: Added option to print looping information etc. 2006-05-31 Istvan Varga <ivarga(a)csounds.com> * InOut/widgets.cpp: FLbutton type 1 callback now sets the output to "ion" 2006-05-30 Istvan Varga <ivarga(a)csounds.com> * Opcodes/fout.c: new opcode: ficlose 2006-05-30 ma++ ingalls <matt(a)sonomatics.com> * aops.c, aops.h, csound.h: invalue/outvalue updates as per Istvan's comments * csound.c: changed "early return" comments to debug only * hetro.c: added pollevents inside processing loop * lpanal.c: added warning message with -g flag * sockrecv.c: took out usleep() declaration - was causing compile error 2006-05-28 ma++ ingalls <matt(a)sonomatics.com> * frontends/CsoundX: added to cvs * aops.c, entry1.c, entry1.h, csound.h: added hack to invalue/outvalue to support strings 2006-05-27 Istvan Varga <ivarga(a)csounds.com> * Added ATS analysis utility. 2006-05-26 ma++ ingalls <matt(a)sonomatics.com> * frontends/CsoundVST/AEffect.h: commented out 2 PRAGMAS causing compile error on mac * Opcodes/vst4cs/vsthost.c: added plug-in loading for MACH-O mac. commented out #includes that caused compile error on mac * Opcodes/vst4cs/vsthost.h: commented out #includes that caused compile error on mac * Opcodes/vst4cs/fxbank.h: commented out #includes that caused compile error on mac * OOps/aops.c: added i-rate support to invalue/outvalue 2006-05-24 Istvan Varga <ivarga(a)csounds.com> * InOut/rtalsa.c: changed default device from "default" to "plughw" * InOut/rtjack.c: list available device names for -i adc or -o dac if an invalid device is specified 2006-05-23 Istvan Varga <ivarga(a)csounds.com> * Opcodes/ugnorman.c: fixed "not initialised" bug in ATSbufread 2006-05-22 Istvan Varga <ivarga(a)csounds.com> * OOps/midiops.c: massign(): interpret channel number <= 0 as all channels * H/csoundCore.h, Top/csound.c: added new function GetCurrentThreadID() to CSOUND structure 2006-05-21 Michael Gogins <gogins(a)pipeline.com> * New API function: csoundGetCurrentThreadId() 2006-05-20 Istvan Varga <ivarga(a)csounds.com> * Opcodes/stackops.c: added new stack opcodes (stack, push, pop, push_f, pop_f); also moved monitor opcode here. * Reworked user defined opcodes to allow for up to 256 input/output arguments. * Opcodes/bilbar.c: removed use of C++ style comments. 2006-05-16 jpff <jpff(a)codemist.co.uk> * Engine/entry1.c: Change args of xin to match OPCODENUMOUTS 2006-05-15 Anthony Kozar <anthonykozar(a)sbcglobal.net> * Top/cscormai.c: Fixed #includes. * interfaces/CsoundFile.cpp: isspace() is in <cctype> and supposed to be in std namespace * H/csoundCore.h: Increased OPCODENUMOUTS to 64 as requested. 2006-05-15 Istvan Varga <ivarga(a)csounds.com> * Opcodes/monitor.c: added new opcode: monitor 2006-05-14 jpff <jpff(a)codemist.co.uk> * util/pvlook.c (pvlook): Rewritten for .pvx format 2006-05-13 jpff <jpff(a)codemist.co.uk> * util/pvanal.c: Added -B # argument to give a beta to the Kaiser window; still defaults to 6.8 2006-05-12 Istvan Varga <ivarga(a)csounds.com> * frontends/csound/csound_main.c: overwrite old log files, rather than appending messages 2006-05-08 Istvan Varga <ivarga(a)csounds.com> * New API functions: csoundCreateMutex, csoundLockMutex, csoundLockMutexNoWait, csoundUnlockMutex, csoundDestroyMutex, csoundRunCommand 2006-05-04 Istvan Varga <ivarga(a)csounds.com> * InOut/rtalsa.c: added new "devfile" MIDI driver that uses device files in /dev, based on code from Csound 4.23 mididevice.c 2006-05-03 Istvan Varga <ivarga(a)csounds.com> * InOut/FL_graph.cpp, InOut/widgets.cpp: * InOut/winFLTK.c, InOut/winFLTK.h: added more FLTK flags (see winFLTK.h) 2006-05-02 Istvan Varga <ivarga(a)csounds.com> * InOut/widgets.cpp, InOut/winFLTK.c, InOut/winFLTK.h: disable threads by default if graphs are used * OOps/sndinfUG.c: filepeak opcode now uses PEAK chunks with libsndfile >= 1.0.16 2006-04-30 Istvan Varga <ivarga(a)csounds.com> * Attempt to fix thread locks on MacOS X. * util/srconv.c: fixed output amplitude when downsampling allow utility to be stopped by yield callback * install.py, installer/misc/mkpackage.py: install TclCsound command documentation 2006-04-29 Istvan Varga <ivarga(a)csounds.com> * Made it possible to control the behavior of the FLTK plugin from the host application. This can be done with the following code between calling csoundPreCompile() and csoundCompile(): CSOUND *csound; ... csoundCreateGlobalVariable(csound, "FLTK_Flags", sizeof(int)); *((int*) csoundQueryGlobalVariable(csound, "FLTK_Flags")) = flags; where 'flags' can be the sum of any of the following values: 1: disable widget opcodes 2: disable FLTK graphs 4: disable the use of a separate thread for widget opcodes 8: disable the use of Fl::lock() and Fl::unlock() 16: disable the use of Fl::awake() additionally, after calling csoundCompile(), the same variable can be checked to find out if graphs or widget opcodes are used: 32: FLrun opcode was called 64: callbacks for FLTK graphs are set * Top/main.c: fixed crash on registering opcodes from the host application * frontends/fltk_gui: new GUI frontend that uses the Csound 5 API and FLTK 2006-04-19 Michael gogins <gogins(a)pipeline.com> * Updated Lua to version 5.1 (current version), changed lua_example.lua to use Class:method calls. 2006-04-17 John ffitch <jpff(a)codemist.co.uk> * Opcodes/bilbar.c: Added prepared piano string model * H/entry1.h: * Engine/entry1.c: Added remove opcode. Probably should be an API function rather than opcode * Engine/insert.c (delete_instr): New code to delete non-active instruments. Still needs to be checked as it may leave structures dangling. 2006-04-15 Istvan Varga <ivarga(a)csounds.com> * Engine/namedins.c, Engine/otran.c: optimizations in orchestra parser * interfaces/lua_interface.i: wrap cs_glue.hpp and csPerfThread.hpp 2006-04-09 Istvan Varga <ivarga(a)csounds.com> * Engine/envvar.c: csoundFileOpen(): check for files with .sd2 extension, and use sf_open() in this case if sf_open_fd() fails * InOut/FL_graph.cpp: wait for the window to be closed by the user at end of performance * InOut/libsnd.c: fixes in enabling peak chunks and dithering * InOut/libsnd_u.c: type2string(): added SD2 to file types * InOut/rtpa.c: print warning if the buffer size (-b) is not an integer multiple of ksmps in full-duplex mode * InOut/window.c: moved deferred loading of widgets plugin from main.c to make graphs work in utilities * Opcodes/compress.c: made rms levels relative to 0dBFS in distort opcode * H/csoundCore.h, Top/csound.c: added dispinit() function pointer to CSOUND structure, for use by utilities * H/version.h: updated API version to 1.01 to reflect change to CSOUND structure * util/pvanal.c: implemented graph displays (limited to 30 frames at this time) * util/sndinfo.c: clear SF_INFO structure before calling sf_open() 2006-04-08 Istvan Varga <ivarga(a)csounds.com> * OOps/sndinfUG.c: restored filepeak opcode 2006-04-07 Istvan Varga <ivarga(a)csounds.com> * H/version.h: updated version number to 5.02.0 to reflect addition of new opcodes * Opcodes/compress.c: fixed a few minor errors 2006-04-04 Michael Gogins <gogins(a)pipeline.com> * Changed FluidSynth opcodes slightly, with fluidEngine iChorusOn, iReverbOn pfields, defaulting to "on"; this can reduce noise in low frequencies in SoundFont rendering. * Updated Windows FluidSynth opcodes to use latest FluidSynth sources. 2006-03-28 jpff <jpff(a)codemist.co.uk> * Opcodes/compress.c: New code for distort and compress/expander from Barry Vercoe 2006-03-25 Istvan Varga <ivarga(a)csounds.com> * Engine/entry1.c, H/aops.h, H/entry1.h, OOps/bus.c, opcodes.dir, Opcodes/pitch.c, Opcodes/pitch.h, Opcodes/spectra.c, Top/csound.c: fixes in sensekey opcode 2006-03-22 Michael Gogins <gogins(a)pipeline.com> * Added ScoreGeneratorVST, a VST plugin for generating scores in VST hosts using Python. * Updated Windows installer for new targets, including Winsound. 2006-03-22 Istvan Varga <ivarga(a)csounds.com> * interfaces/cs_glue.cpp: * interfaces/cs_glue.hpp: - added new classes to wrap MIDI I/O: CsoundMidiInputStream sends MIDI input messages CsoundMidiOutputStream polls MIDI output messages - added MIDI I/O callbacks to CsoundCallbackWrapper - made it possible to use the message buffer in multiple threads, to allow for redirecting the message output of a CsoundPerformanceThread 2006-03-21 Istvan Varga <ivarga(a)csounds.com> * SConstruct, Makefile-win32: renamed Csound library to csound{32,64}.dll.5.1 on Windows * SConstruct: attempts to fix install target (still needs a lot of work) * Engine/namedins.c, OOps/bus.c: fixed a-rate channel allocation in user defined opcode with local ksmps * Engine/linevent.c: various minor fixes and code improvements

18 years, 12 months

[linux-audio-dev] Re: real time priority programming tutorial

by Juhana Sadeharju

>From: Alex <x37v.alex(a)gmail.com> > >Does anyone have a link to a reference about making apps with real >time priority capabilities? >I figure I can just look at jack but it would be nice see some >tutorial, to learn what is actually happening/necessary, trade-offs, >etc. I suggest to look at source codes. They give up-to-date info and a working solution. Saves time. There are also documentation on general realtime programming. E.g., I have found the following: http://www.funet.fi/~kouhia/APS33DTE.PDF http://www.funet.fi/~kouhia/sgirealtime.pdf http://www.funet.fi/~kouhia/sgitopics.pdf More recent versions could be found if you check their site. Other system makers could have equivalent docs (apple, microsoft). Juhana -- http://music.columbia.edu/mailman/listinfo/linux-graphics-dev for developers of open source graphics software

18 years, 12 months

Re: [linux-audio-dev] real time priority programming tutorial

by Alex

Sorry to be vague, basically, what I want to do is create a timer for an "event" sequencer I'm writing (which I will use to write music compositions, video, etc). I cannot find "event timers" that will give me accuracy of less than 1ms, so I'm using a 1ms resolution event timer and after that polling the time of day in order to get to the time I want. I'm trying to achieve ~256-900 event clock "ticks" per second and minimize jitter. First off, if anyone has advice for implementing such a timer I'd appreciate it, but second, I'm wondering how I can make my program have "real time" priority such that when a signal is created by this 1ms resolution event timer my app is quickly made to respond to the signal and so this can be done as a user, [using set_rlimits, pam or what have you (this is what i was talking about in my first email)]. Also, as I figure missed ticks are probably inevitable, I'm trying to figure out a way to make my program robust to missed clock ticks [so that over time i am still on beat]. Thank you, Alex Norman > > On Fri, 02 Jun, 2006 at 01:06AM +0200, Jens M Andreasen spake thus: > > On Thu, 2006-06-01 at 10:06 -0700, Alex wrote: > > > Does anyone have a link to a reference about making apps with real > > > time priority capabilities? > > > > As such there is no difference between an RT app and a not RT app, > > except that the former varity might not work as advocated .... > > I think he meant: how you demand RT priority and what you should do > not to screw it up once you have it. > > > > I figure I can just look at jack but it would be nice see some > > > tutorial, to learn what is actually happening/necessary, trade-offs, > > > etc. > > > > > > thanks, > > > Alex Norman

18 years, 12 months

[linux-audio-dev] real time priority programming tutorial

by Alex

Does anyone have a link to a reference about making apps with real time priority capabilities? I figure I can just look at jack but it would be nice see some tutorial, to learn what is actually happening/necessary, trade-offs, etc. thanks, Alex Norman

19 years

[linux-audio-dev] Quatafire 610 and freebob: recent news?

by Jose Henrique Padovani

So: I have visited six motnhs ago the freebob site and became very curious about Quatafire 610 under linux... The site has not changed to much since then. Any news? It would be a very nice interface to use in any system. (linux, mac, win...) I have particular interest in intercative music on Puredata then low latency would be a important thing.. Another thing that would be nice know is if anyone knows about freebob integration on Debian based distros like Ubuntu. I thanks anyone that has news or sugestions (not RME, please: to high prices on my country). J.H. _______________________________________________________ Abra sua conta no Yahoo! Mail: 1GB de espaço, alertas de e-mail no celular e anti-spam realmente eficaz. http://mail.yahoo.com.br/

19 years

[linux-audio-dev] LV2 library API

by Dave Robillard

Hi all, I've been working on a host library for LV2 plugins. It's at the point where everything is working (LV2 plugins are working in Om right now), so I'd like some feedback on the API from anyone who's interested before it gets too entrenched. The primary design goal is to be as simple and terse as possible for the host author, so if you would prefer something was different let me know. A simple (working) Jack host: http://www.scs.carleton.ca/~drobilla/files/slv2_jack_host.c Doxygen documentation: http://www.scs.carleton.ca/~drobilla/files/libslv2_doc/ (Anything having to do with SLV2Property is still hairy, everything else is fair game). And no, you can't have the code yet. Steve would hang me. :) Cheers, -DR-

19 years

[linux-audio-dev] [ANN] bcx2000edit: Editor for BCR2000/BCF2000

by Pieter Palmers

Hi all, I had to familiarize myself with python for work, and I took it as an opportunity to hack on something I've want for some time now. I have these behringer control surfaces, and they are pretty cool, but there is no editor for them on linux. And using the device interface itself is a little cumbersome. So I figured out the sysex format (the patch dump format from "edit + >") and wrote a parser for it in python. I also have a small PyQt inteface (had to learn that too) that allows you to load files, change the values and save them as a new file. Note that this is very basic & non-bugfree software. No checking whatsoever is performed on the sysex files, so if your control surface displays "ERR" when you send a sysex file, you're probably violating the format. The GUI is also limited to changes on existing files only. I put this code online because I think it might be a nice starting point for somebody that want's to write a real editor. It shouln't be that hard (mostly GUI design), and they can use this code to further explore the sysex format. I'm not planning to work on this any further because (1) it serves my needs and (2) I need my time for other projects (most notably freebob). Anyway, you can find the code here: http://freebob.sourceforge.net/old/bcx2000edit.tar.gz Let me know if you start something with it. Greets, Pieter

19 years

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Linux-audio-dev June 2006