Linux-audio-dev

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7516 discussions

by James Morris

Hi, I'm pretty sure I've seen this dealt with on the list before, but can't find it. With the program I'm fumbling around trying to create, it will be possible for successive note on events for the same pitch to occur without note off events intervening. Does the MIDI spec allow such things? The bash-script prototype of the program did this, and, I believe, the soft-synths used, acted appropriately - that is, re-triggered the notes. So I guess the question is, does it make any difference if I add-in the note-off events - which, thinking about it, is going to be tricky because, basically, although the program is sequencing, it will be real time and is not psychic! Cheers, James.

15 years, 7 months

yoshimi and the Space Choirs reconciled at last

by cal

0.056 2010-04-12 reinstates PADsynth functionality - a stuff up in XMLwrapper::getparbool(); no other changes worth mentioning. <http://sourceforge.net/projects/yoshimi/files/> and that one was really horrible to find ... educational though :-(.

15 years, 7 months

Jack working on ARM?

by nescivi

Hiho, is Jack working on this processor: CORTEX A8 ARM ? I'm looking at this board right now: http://www.igep-platform.com/ There is an Ubuntu available for it... sincerely, Marije

15 years, 7 months

Updates

by fons＠kokkinizita.net

Some updates on <http://www.kokkinizita.net/linuxaudio/downloads> jconvolver-0.8.7 Bugfixes to fconvolver, now exits cleanly. Thanks to Joern Nettingsmeier for reporting this bug. zita-resampler-0.1.1 Library is not changed, new version of the audio file resampling application. For 16-bit output 'resample' now supports dithering: rectangular, triangular or 'noise shaped' using the Lipschitz filter. Enjoy ! -- FA O tu, che porte, correndo si ? E guerra e morte !

15 years, 7 months

jack1 and netjack -M

by alex stone

Recently the -M switch was added to jack1 as a means to independently set the jackmidi buffer size. (and it works well, i hasten to add.) Is this also true for the netjack driver in jack1? Can we independently set the jackmidi buffer on a netjack slave in the command line? Alex. -- www.openoctave.org midi-subscribe(a)openoctave.org development-subscribe(a)openoctave.org

15 years, 7 months

does sndfile-convert apply dither when reducing wordlength?

by Jörn Nettingsmeier

if not, an option to do so would be cool. best, jörn

15 years, 7 months

malloc in fftw

by Maarten de Boer

Hi, I suppose that many of you are or might be using fftw for real-time audio processing, and I think the following information may be of your interest. I just came to realize that fftw_execute calls malloc. This happens even though you create a 'plan' where you pass fftw_malloc preallocated input and output buffers. It goes without saying that calling malloc is bad practice for audio callbacks, but as a reference I quote the jack_set_process_callback documentation: The code in the supplied function must be suitable for real-time execution. That means that it cannot call functions that might block for a long time. This includes malloc, free, printf, pthread_mutex_lock, sleep, wait, poll, select, pthread_join, pthread_cond_wait, etc, etc. I wrote the fftw developers and they confirmed the memory allocation takes place. They suggested the following: > Try planning with the undocumented flag FFTW_NO_BUFFERING, which will > prevent the use of malloc() in common cases. This is not > foolproof---some transforms are very hard to do without additional > buffers, but if all you are trying to do is vanilla out-of-place 1D > transforms without large prime factors it should work. Maarten

15 years, 7 months

MF-401 Auto De-tune

by Jens M Andreasen

The MF-401 can be used to treat your vocals to be off-key in a variety of ways. Presets include: •Drunk as a Sailor •Seattle sensitive alternative warble •Where did all the green room beer go? http://www.moogmusic.com/moogerfooger/?section=product&product_id=21374

15 years, 7 months

[OT] Handle/Mobile devices

by Marco Castorina

Dear all, I'm collaborating with a lecturer on creating tests to deliver to users for research purposes. His idea is to deliver them using mobile devices like the iPhone and I'd like to use one of the OS devices like the Neo FR, Pandora or even Indamixx. The problem is that, if it all goes well, we'd need a lots of them (50/100), so I'm looking for something cheaper at the moment. Do you have any idea/suggestions? Of course I prefer OS devices. Thanks all, as always! Marco Send instant messages to your online friends http://uk.messenger.yahoo.com

15 years, 7 months

jack-session finally merged.

by torbenh

hi... jacksession stuff is merged into jack1 svn. here is a rough explanation what needs to be done for apps to support it: http://trac.jackaudio.org/wiki/WalkThrough/Dev/JackSession please let me know what is unclear. -- torben Hohn

15 years, 7 months

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Linux-audio-dev