Linux-audio-user December 2011

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Have some free music!

by alexander

Time for some harmless selfpromosion ;) five new songs since I last posted. http://sharpattack.bandcamp.com/

12 years, 10 months

audiophile 2496

by nepal

Hello Everyone. I am a mere lurker, sadly no musician, but do really love listening. I run linux mint and am thinking about treating myself to the above sound card to improve my listening experience. I'll be running the output to my Kenwood hifi amp using the phonos I expect. Is the above sound? as in sensible and workable. I'd rather not get into manually messing with my distro settings if that is possible. Are there any gotchas to be considered? Can I just go ahead, buy, and plug and play? many thanks for any help offered. n ______________________________________________ This email has been scanned by Westcoastcloud. http://www.westcoastcloud.com/

12 years, 10 months

makesfz.sh

by Dan MacDonald

Glad tidings I bring the free audio realm for 2012! After seeming years of guru meditations on this problem, I have finally come across a method of easily using a folder of wav samples to create sfz drum kits that can be used with Linuxsampler under qtractor, A3, OOM or what haveth ye for DAW!! I came across a perl script that almost sounded like it would do what I want here http://www.drealm.info/sfz/ but I failed to get that to work and I don't know perl to fix it yet and nor do I think I'll bother but I will write a bash script to create a .sfz looking like so by simply running said script in the folder containing the wav files for your kit. Hence if you ran makesfz.sh within a dir containing 001-bassdrum.wav and 002-snaredrum.wav we would get the following output: <region> sample=001-bassdrum.wav key=0 lovel=0 hivel=127 <region> sample=002-snaredrum.wav key=1 lovel=0 hivel=127 I do expect someone here will have wrote such a script and added bells already so may they be so kind as to share it so then we may add it to the LinuxSampler online resources or get it bundled with the app itself? All the best for 2012! danboid

12 years, 11 months

QMidiArp-0.4.3 released

by Frank Kober

Here it is, a new QMidiArp version has arrived! The main new features are JACK MIDI, which is the default backend now, JACK Session support, and a new in-sequence loop marker that can be used to bounce the play direction or to loop at a mouse-clicked position in the sequence. Note that you can still get the alsa backend by starting with qmidiarp -a . The full list of noticeable changes is below. Thanks again to all having reported ideas and bugs and given their support. Masters of the step sequencer, Enjoy! ----------- Feedback as usual to qmidiarp-devel(a)lists.sourceforge.net or on the IRC #qmidiarp Website with documentation: http://qmidiarp.sourceforge.net ----------- New Features o Groove functions now work for all modules, not only Arps o Effect of groove settings is displayed in the Arp/LFO/Seq screen o LFOs can be triggered and restarted by the keyboard o When reducing the size of LFO waves or Sequences, the original data is kept in memory and is also saved to the session file as a whole o LFO and Seq play direction can now be chosen, and bouncing loops are possible o New user positionable loop marker in Seq module. The marker is placed by left or right mouse click on the bottom cursor line of the sequencer and represents an additional return/loop point. It can be removed again by clicking in the bottom left or right area of the Seq screen. o Triggered one-shot play of LFO and Seqs improved o JACK MIDI backend available. This is now default, use the -a option for getting the ALSA backend o JACK Session support when using JACK MIDI backend Fixed Bugs o A rounding error led to desync when Arps were used with groove shift o MIDI controls for Groove did not initialize upon "New..." o MIDI Controllers assigned to multiple destinations stopped at the first one encountered and ignored all others General Changes o JACK MIDI is now the default backend, -a option enables ALSA backend o Obsolete .qma text file import removed

12 years, 11 months

Re: [LAU] Simple, easy multithreaded circular buffer library for Linux?

by Kjetil S. Matheussen

Olivier Guilyardi: > > Ken Restivo wrote: >> It has been over 7 years since I last messed around with writing Pthreads applications. >> >> I recall it as a painful, ugly, brain-numbing task. I located an exercise I did back then to address the consumer/producer problem in Pthreads, and just the sight of it is giving me a headache. >> >> I'm being lazy, so instead of researching everything that's out there, I'll ask here: can anyone recommend a relatively simple and painless abstraction library (GPL or LGPL of course) that will give me functions to create a thread in which I can stuff things into a ring buffer, and another thread in which I can pull stuff out of it? >> >> By the way, I know that JACK has a very nice event buffer which is insanely easy to use (and I have), and makes multithreading almost transparent, but this isn't a JACK app. > > I don't know of any abstraction library, but creating/terminating a normal > thread with pthread is really an easy task IMO. It's about 10 lines in C. > > For inter-thread communication there's Portaudio's ring buffer: > http://portaudio.com/trac/browser/portaudio/trunk/src/common/pa_ringbuffer.h > > It can easily be used out of Portaudio (I'm currently doing that), and it > features memory barriers [1] which AFAIK Jack's ringbuffer doesn't. > > One problem with everything Portaudio is this heavy naming scheme. For a simpler > API, you might like my little wrapper: > http://jackbeat.samalyse.org/browser/jackbeat/trunk/src/core/ringbuffer.h > Nice. It's probably quicker to copy the jack_ringbuffer.c file out of jack though. > Portaudio actually also offers a callback mechanism (with hidden thread > creation), so if you're coding an non-JACK audio app, you might want to check it > out. > > For thread synchronization, semaphores (man semaphore.h) are really easy to use. > However, if you need a lock-free equivalent (for realtime, ...) phtread mutex > and especially pthread_mutex_trylock are your friends. > Those friends can be really cranky sometimes though. By using atomic operations instead, it's possible to avoid a lot of headache by not having to synchronize at all. Performance might be better too. Midishare has lockfree atomic functions for lifo and fifi queues: http://midishare.cvs.sourceforge.net/viewvc/midishare/midishare/src/common/…

12 years, 11 months

New Avantgarde Music - or just more Prog?

by Julien Claassen

Hello everyone! I've just completed my latest piece and it has reached its intended audience, so I'm ready to post it here. It's called Raw Magic: http://juliencoder.de/nama/raw_magic.ogg http://juliencoder.de/nama/raw_magic.mp3 And you can find lyrics here: http://juliencoder.de/nama/raw_magic.html Or of course visit the music page at: http://juliencoder.de/nama/music.html This time I'd like to utter my heartfelt thanks to Joy Bausch, for guitars. A nice job! I'd like to thank S. Massy, Gabbe Nord and the mysterious Mr. Bennett for being my second pair (and third and fourth :-) - though not necessarily in that order) of ears. Without you I'd still suffer from some of my mixing difficulties. And I'd like to thank Silvia. The beginning of that song the first four notes or so came to me in a small bar in Paris almost two months ago now. I thought of some more notes there, but they didn't sound right. :-) The other main idea followed later that day, after having attended a concert by Goran Bregovic. So this piece again stretches the boundaries of my usual influences. You'll find some light asian influence, the balkaniser, simple piano music, light jazz, metal, glam-rock, synth-pop and a bit of the good old prog all bundled into this. And it's not because I didn't know, whereelse to put them. It's actually a study of some rather personal experiences, seeing them from very different angles. I hope I succeeded. :-) I know, that my singing leaves somethig to be desired (better intonation for a start :-) ), but I suspect, that it could have been worse. As ever any feedback is welcome and a beer to those, who find the fun and games in the lyrics. :-) Kindest regards Julien =-=-=-=-=-=-=-=-=-=-=-=- Such Is Life: Very Intensely Adorable; Free And Jubilating Amazement Revels, Dancing On - FLOWERS! ====== Find my music at ====== http://juliencoder.de/nama/music.html ..................................... "If you live to be 100, I hope I live to be 100 minus 1 day, so I never have to live without you." (Winnie the Pooh)

12 years, 11 months

How to get 64-bit Flash plugin to play through JACK2?

by david

I'm sure I have this somewhere in my mail archive, but search can't find it now ... Have heard of something called the alsa-jack-plugin, but can't find it anywhere. Have tried something else using something in .asoundrc (don't remember what it was, it didn't work, so I got rid of the .asoundrc I had created to try it - didn't have an .asoundrc file before). My lovely wife would like to watch her Amazon movies on my 64-bit desktop PC because it has the large LED monitor. Stupid computers. -- David gnome(a)hawaii.rr.com authenticity, honesty, community

12 years, 11 months

Music: The Divorcees Waltz

by Josh Lawrence

A cover of a tune written by the great guitar player Adrian Legg, posted here for your enjoyment and suggestions. Link to blogspam: http://devio.us/~jhl/blog/?p=9 Direct link to the song: http://devio.us/~jhl/blog/wp-content/uploads/2011/11/divorcees-waltz.ogg Hope you all enjoy! (For Leigh - yea, that's all finger drumming in there :) -- Josh Lawrence 903-490-3700

12 years, 11 months

New Experimental Track

by Folderol

This is a three part multi-layer improvisation, that hopefully pushes out my boundaries a bit more. I hope you like it. http://www.musically.me.uk/music/Stranger.ogg -- Will J Godfrey http://www.musically.me.uk Say you have a poem and I have a tune. Exchange them and we can both have a poem, a tune, and a song.

12 years, 11 months

A new Bach 3-part Invention in C minor

by Julien Claassen

Hello everyone! OK, just recorded: http://juliencoder.de/nama/bach-c_minor_sinfonia.ogg http://juliencoder.de/nama/bach-c_minor_sinfonia.mp3 It's played on a piano and processed by a reverb from the concertgebouwe (Amsterdam). Nothing fancy. :-) I know, there are one or two problems in there, which shouldn't be, but overall it was the best I could do tonight and I feel rather impatient. :-) Enjoy, anycomments welcome! Warmly yours Julien =-=-=-=-=-=-=-=-=-=-=-=- Such Is Life: Very Intensely Adorable; Free And Jubilating Amazement Revels, Dancing On - FLOWERS! ====== Find my music at ====== http://juliencoder.de/nama/music.html ..................................... "If you live to be 100, I hope I live to be 100 minus 1 day, so I never have to live without you." (Winnie the Pooh)

12 years, 11 months

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Linux-audio-user December 2011