Linux-audio-dev

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Re: [linux-audio-dev] Re: [Jackit-devel] 2.4.20-rc1�� + lowlat +preempt + alsa + jack = dead computer

by delire

audality looks good. we are currently using fmod <http://fmod.org> for a large games based arts project that sadly had to be win32 due to the nature of out middleware sponsorship <http://selectparks.net/acmipark.htm> currently i am using the <http://nevrax.org> NeL engine and hope to integrate fmod. i am however interested as to whether or not audality will at some point support www streaming. also, i've just ordered linux for ps2 dev kit.. looks like fun ;) julian oliver http://www.selectparks.net > On Saturday 07 December 2002 03.58, Fernando Pablo Lopez-Lezcano > wrote: > > > Where are the lowlat and preempt patches for 2.4.20? > > > > Not on the net at this point. I have been hand tweaking the > > originals to patch cleanly (trying to fix the failing chunks). I > > can email them to you, use at your own risk :-) > > I would be interested in trying your version of the patches. Please > mail! :-) > > > BTW, I applied the 2.4.19 LL patch to 2.4.20, and got a few rejects > in the file system area, which I have not investigated further. > (Seems to be a lot of changes around there...) Performance is "ok" > under X and proc stress, but I get countless latencies in the whole > range up to some 6-8 ms as soon as I start stressing the disk. (This > is *with* DMA enabled, of course.) > > Haven't tried preempt yet. > > > As to freezing, I've only managed to do that once - and IIRC, that > was when trying to instantiate a synth in MusE while Ardour was > running in the background. No useful info about what actually > happened, and I haven't tested that combination any further. > > Are you certain your freeze is actually happening in kernel space? > Tried using watchdog with "ping-pong" between highest and lowest > priority SCHED_FIFO threads? (BTW, we should have a watchdog anyway, > probably integrated with givertcap or something.) > > > //David Olofson - Programmer, Composer, Open Source Advocate > > .- The Return of Audiality! --------------------------------. > | Free/Open Source Audio Engine for use in Games or Studio. | > | RT and off-line synth. Scripting. Sample accurate timing. | > `---------------------------> http://olofson.net/audiality -' > .- M A I A -------------------------------------------------. > | The Multimedia Application Integration Architecture | > `----------------------------> http://www.linuxdj.com/maia -' > --- http://olofson.net --- http://www.reologica.se --- > > --

21 years, 11 months

[linux-audio-dev] lrdf version 0.1.2

by Steve Harris

http://plugin.org.uk/lrdf/ Applied patches from Richard Bown, making it c++ friendly and fixing some const-isms. liblrdf is a library for handling RDF (http://www.w3.org/RDF/) descriptions of LADSPA (and potentially other format) plugins. It allows grouping of plugins into trees for user slection and finer description of plugins and ports than the .so format allows (for example to indicatate textual equivalents of integer port values). It also provides named and described defaults and presets, metadata and general semnatic goodness. examples/example.rdf contains a slighly out of date description of my plugins. There are some example programs that show how the API works. - Steve

21 years, 11 months

[linux-audio-dev] ANN: swh-plugins 0.3.3

by Steve Harris

http://plugin.org.uk/releases/0.3.3/ Me again :) Sorry to release again so soon, but quite a few people have asked me for the improved Bode shifter, and everyones always after more pitch shifting options so I decided to release again. I've added a more sophisticated Bode shifter and made quality, speed and channel separation improvements to the old one. The outputs may even be labelled correctly now ;) I've also added an AM pitch shifter, which is pretty fast and for certain source material it actually gives reasonable sounding results, much to my supprise. Pitch shifter: http://plugin.org.uk/ladspa-swh/docs/ladspa-swh.html#id1433 Frequency shifter: http://plugin.org.uk/ladspa-swh/docs/ladspa-swh.html#id1431 Enjoy, Steve

21 years, 11 months

[linux-audio-dev] New relase of ZynAddSubFX (1.0.1)

by Nasca Paul

Hi. Today I relased a new version of ZynAddSubFX. News: - corrected a bug that made ZynAddSubFX to crash(sometimes) if you disable a part - wrote Resonance (This produces natural sounds, listen demo07.ogg from homepage) - added the BandPass filter - added the recording feature (as raw files) - added "New instrument" menuitem ZynAddSubFX is a free (GPL v.2) software synthesizer. The homepage is: http://zynaddsubfx.sourceforge.net/ You can download it from: http://sourceforge.net/projects/zynaddsubfx Hope you like it. Paul. __________________________________________________ Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now. http://mailplus.yahoo.com

21 years, 11 months

[linux-audio-dev] Echo Darla/Gina/Layla/... on Linux

by David Olofson

I have a short, simple question: Would anyone around here care for ALSA drivers for the Echo (formerly Event/Echo) line of studio audio interfaces? (We're talking about the original Darla/Gina/Layla, as well as the new 24 bit interfaces.) I have an old 20 bit Layla. I have their C++ driver source, which has been released under some BSD/MIT style licence. I have kernel hacking experience. I still have some hard feelings, I think... Hack or ditch? //David Olofson - Programmer, Composer, Open Source Advocate .- Coming soon from VaporWare Inc...------------------------. | The Return of Audiality! Real, working software. Really! | | Real time and off-line synthesis, scripting, MIDI, LGPL...| `-----------------------------------> (Public Release RSN) -' .- M A I A -------------------------------------------------. | The Multimedia Application Integration Architecture | `----------------------------> http://www.linuxdj.com/maia -' --- http://olofson.net --- http://www.reologica.se ---

21 years, 11 months

[linux-audio-dev] LAD Meeting at ZKM, Karlsruhe/Germany 14.-16. March 2003

by Dr. Matthias Nagorni

This summer some of us met at the LAD booth at Linuxtag in Karlsruhe, Germany. Since the participants of this meeting enjoyed it very much, we discussed about meeting again in spring 2003. Frank Neumann and I had the idea of asking the "Zentrum fuer Kunst und Medientechnologie", Karlsruhe/Germany (Center for Art and Media, http://www.zkm.de) whether they would be interested in hosting such a meeting. The answer was positive and so we can invite to a LAD meeting at the Institut fuer Musik und Akustik (Institute for Music and Acoustics) at ZKM. The meeting will take place from Friday, 14. March 2003 to Sunday, 16. March 2003. We intend to have public sessions where we can present Linux audio applications and give talks and non-public sessions where we can discuss future audio development. For further planning the meeting we need a registration for talks/presentations at the public sessions, including an abstract and, if necessary, images/screenshots. To estimate the required room, we also need a registration for the non-public sessions. Please register talks/presentations until 8. January 2003 (please earlier, if possible), so that they can be announced in the printed programme of ZKM. Please register for the non-public sessions until 3. March 2003. Registrations can be sent to either Frank Neumann or me. Please use the keywords "ZKM registration" in the subject. We will post the list of talks/presentations and further information on the meeting from time to time, so that you can decide about joining this meeting. Matthias -- Dr. Matthias Nagorni SuSE GmbH Deutschherrnstr. 15-19 phone: +49 911 74053375 D - 90429 Nuernberg fax : +49 911 74053483

21 years, 11 months

[linux-audio-dev] smpte generating code

by Paul Davis

i know that someone posted smpte-reading code here last year. does anyone have any pointers to source code to generate smpte? --p

21 years, 11 months

[linux-audio-dev] ANNC: Audiality 0.1.0 Alpha Release

by David Olofson

Audiality 0.1.0 Alpha Release ----------------------------- Audiality is an audio engine originally designed for playing music and sound effects in games. Scalability has been a major priority; the current version will run on very low end Pentium systems, but also scales to audio quality comparable to that of "real" hardware synths. (That is not to say that Audiality can compete with the feature set of those synths... Yet.) The engine builds as a shared or static library, or both if possible. (Not sure if it builds for Win32, but it did not long ago...) Two simple test programs (one for the scripting engine and one for the whole thing) and a bunch of demo sounds and songs are included. That minimalistic plugin API, and the timestamped event system are in there. Should be easy enough to extract for anyone who wants either or both for something else. Both are LGPL, just like *most* of the rest of the engine. (Read on...) Licensing terms: I intend to release all of the code under the LGPL. However, there are still traces of the GPL code that "inspired" the creation of this engine. (I didn't really mean to turn those four little files it this beast... *heh*) That code was written by Masanao Izumo (maintainer of Timidity++), whom I have not been able to contact. Therefore, the engine as a whole has to be considered GPLed, until this issue can be resolved one way or another. Feel free to find Masanao for me, contribute LGPLed versions of the offending files, or whatever. This might all sound silly to you, but I can't say for sure how much of Masanao's code and design is still in there, and I don't feel like stealing and sublicensing stuff - be it 5 lines of code. No big deal - it's still Free, and I'm not planning on making money on Audiality as a product anyway. The motivation for LGPL is just that I want people to also be able to use Audiality for what it was originally intended: Game audio. The files (temporary location): http://www.seaside.se/~sea1154a/audiality-0.1.0.tar.bz2 (359 kB) http://www.seaside.se/~sea1154a/audiality-0.1.0.tar.gz (467 kB) To install: * Unpack into whatever place you want sources * In the top dir: * ./configure * make * As root: (or add options for user install) * make install * In the test subdir: * ./configure * make * ./eeltest (does the output make sense? ;-) * ./atest (enjoy! :-) If the lib won't compile for reasons related to ALSA, I'm afraid you have to './configure --disable-alsa', since the ALSA rawmidi support is for 0.5 only... Sorry. (I'd happily accept a patch - including audio support, as I'm using ALSA 0.9 myself now! ;-) Requirements: * SDL 1.2 (http://www.libsdl.org) * Autoconf 2.55 * Automake 1.7.1 * Libtool 1.4.3 (Though you can probably build with slightly older versions of autotools. I just grabbed the latest tarballs from the GNU site.) Some working features (or so I hope!): * Voice mixer with * 2 stereo sends with independent bus selection * Smooth ramping of sends - no zipper noise * Scalable resampling quality: * Nearest sample * Linear interpolation * Adaptive oversampling * Cubic interpolation * Native support for multiple waveform formats: * 8 bit integer * 16 bit integer * Mono as well as stereo * Internal mixer with * Up to 16 busses * Up to 8 insert effects per bus * Full send array... * ...that can send to other busses * ...before the first insert * ...after each insert * Two way kewl insert effects (not really): * Feedback delay "reverb" * Basic limiter * Off-line waveform rendering package: * Driven by a simple scripting language * Can be driven through a handy C API. * Supports various sample formats: * 8 bit integer * 16 bit integer * 32 bit float * Mono as well as stereo * 7 modulation targets, each with: * 1 envelope generator * 1 LFO * Oscillator operator with: * 6 mixing/combination modes: * ADD * MUL * FM * FM_ADD * SYNC * SYNC_ADD * 13 waveforms/tone synthesisers * SINE (with FM if you like) * HALFSINE (half wave rectified) * RECTSINE (full wave rectified) * PULSE (PWM capable) * TRIANGLE (mod => saw-tri-saw) * SINEMORPH (recursive FM) * BLMORPH (sin, saw, square) * BLCROSS (sin, saw, square) * NOISE (SID style; NG + S&H) * SPECTRUM (additive Df) * ASPECTRUM (multiplicative Df) * HSPECTRUM (harmonic) * AHSPECTRUM (pseudo harmonic) * Basic filters: * Low pass, 6 dB/oct * High pass, 6 dB/oct * Basic resonant filters (oversampled): * Low pass, 12 dB/oct * High pass, 12 dB/oct * Band pass, 12 dB/oct * Band reject/notch, 12 dB/oct * Band boost/peak, 12 dB/oct * Real time MIDI input (ALSA 0.5 or OSS) * MIDI file loader/player * Audio output through * SDL (and whatever that supports) * OSS * OSS/polling (only for broken debuggers...) * WAV and "RAW" audio file loading. (SDL) The main goal for the future is to extend the scalability of Audiality well into the range of serious home and professional studio use. The idea is to provide total control, a multitude of *useful* features, tools for fast and effective creation of original sounds, and excellent audio quality. I'm serious about music, and I'm not going back to programming hardware synths with little LCD displays or crappy editor software. Audiality is meant to replace the hardware synths I have, and eliminate the need for future purchases in that area. (I'd much rather spend the $$$ on audio interfaces, CPU power and perhaps, good sample libraries.) It's a tough goal, but I have been known to produce hundreds of lines of working code a day (*), when strongly motivated. :-) (*) Calculated from Audiality statistics during the period when most of it was written. Around 300 lines/day, IIRC. Some TODOs: * Separate audio/MIDI drivers from the core! * Implement a serious API for the engine library! * Audio I/O through JACK, ALSA and possibly LADSPA. * ALSA sequencer support. * OSC? DMIDI? Whatever works. * Hosting LADSPA plugins as inserts. * Support multichannel I/O directly through the mixer. * Make the FX plugin API use the event system. * Add support for float32 processing and plugins. * Direct-from-disk waveform playback. (EVO?) * Switch from interpreter to compiler + VM. * Support scripting in the real time engine. * Script editor with GUI panels for known constructs. * Full GUI editor that generats scripts from scratch. * Integrate the off-line and RT synths totally. * Split voice mixers into "resampler" and "send unit" * Support voice insert plugins? Maybe, maybe not... * Implement better resampling in the voice mixers Have fun! //David Olofson - Programmer, Composer, Open Source Advocate .- Coming soon from VaporWare Inc...------------------------. | The Return of Audiality! Real, working software. Really! | | Real time and off-line synthesis, scripting, MIDI, LGPL...| `-----------------------------------> (Public Release RSN) -' .- M A I A -------------------------------------------------. | The Multimedia Application Integration Architecture | `----------------------------> http://www.linuxdj.com/maia -' --- http://olofson.net --- http://www.reologica.se ---

21 years, 11 months

[linux-audio-dev] ANN: swh-plugins 0.3.2

by Steve Harris

Sorry, to release again so soon, but I f**ked up and forgot to commit the fix for the duplicate UID. Erk! Thanks to Nathaniel Virgo for noticing, and reporting a bug in the chebstortion: for some input (eg. pure sinewaves) it produces odd clicks in the output, I've seen this elsewhere, but for the life of me I can't remeber where, or what caused it. Someone else reported a bug in the multiband EQ: freqeuncy dependent wideband distortion, but I cant reproduce it, so more reports about this would be good. To make up for it, I've just added a "Bode frequency shifter", an interesting synthesis tool, as requested by Matthias. I've wanted one for years, and didn't think they would be so simple to implement digitally. It produces some aliasing with wideband input, I can fix it later if enough people request it. Anyway, http://plugin.org.uk/releases/0.3.2/ - Steve

21 years, 11 months

[linux-audio-dev] OT: amp modeling

by Will Benton

Hello, all. This is perhaps totally OT, but with all of the recent conversations about amp-modeling, I was wondering if anyone had any pointers to how to build a physical, analog, amp-modeling stompbox or similar (or would it just be cheaper to buy a SansAmp?) Any direction to get started in this arena would be helpful. thanks, wb -- Will Benton http://www.cs.wisc.edu/~willb "YOW!! That was one of my BEST NIGHTMARES!!"

21 years, 11 months

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Linux-audio-dev