Linux-audio-user July 2009

linux-audio-user@lists.linuxaudio.org

124 participants
114 discussions

Steinway_IMIS2.2 soundfont (no loops fix)

by Roberto Gordo Saez

This is Steinway_IMIS soundfont, version 2.2. ftp://musix.ourproject.org/pub/musix/sf2/Steinway_IMIS2.2 This version fixes the issue with loops. I hope this is the good one and there are no more remaining major bugs. Marcos is a little busy right now, so he asked me to make this fix. He is thinking to make other improvements, so expect more updates soon.

1 year

[linux-audio-user] Sub-harmonic generator? (LADSPA or VST)

by Tim Howard

Hello, Does anyone know of a good plugin that will generate subharmonics? I would like to put a little more low frequency "oomph" into my bass track. Preferrable LADSPA, but VST would work, too. Thanks for any help! -TimH

7 years, 7 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, 3 months

Connie, an organ template for JACK

by Martin Homuth-Rosemann

Hi, sorry, just realized that the hammond discussion mentioned below was here and not at LAD, so please allow this kind of "crosspost": this is my first post to LAD. The discussion about a hammond simulation "Fons could you make us...", Beatrix and some research for writing a (german) wikipedia article (stub) about the Vox Continental inspired me to hack a quick organ program that simulates the internal signal flow of the "Connie" with JACK MIDI input and JACK audio output. Have fun: http://cryptomys.de/horo/Connie/Connie-0.1.tar.gz Ciao Martin Homuth-Rosemann

13 years, 8 months

Auto-Wah and Clav... not quite

by Ken Restivo

For several years I've lusted away over the Clavinet-through-Auto-Wah sound: the Stevie Wonder sound (also used notably by Herbie Hancock, Medeski, Martin and Wood, and others). The problem is that either the LADSPA auto-wah plugin doesn't quite cut it, or the Clav soundfont I found on Hammersound several years ago doesn't have enough dynamic range to really make the thing "wah" in any noticeable way. Am I doing something wrong here, or is the plugin not quite the best implementation, and if so, are there any better ones? Likewise with Clavinet soundfonts too. -ken

14 years, 6 months

Wine + Firefox + Flash == No Audio with ALSA

by Ken Restivo

I've successfully gotten Firefox to run on Wine with Adobe Flash (presumably so that I can actually see people's websites, and listen to their music. Sheesh.). This is on a 32-bit system. But no sound. WineCfg seems to think that the only drivers available are dmix, but I don't have dmix configured, or running, and I do NOT want dmix at all! http://portaserver.restivo.org/kens/dmix0.png I use this system for JACK audio, so I don't want crap mixing happening in ALSA adding latency. I'm fine with shutting down JACK in order to surf on Windoze, for those times when I actually need it. I do NOT want to have to run a soundserver like ESD, which is what a lot of the advice on Das Internets seems to say to do. So I want Wine/Firefox to just use the direct access to the ALSA card. My .asoundrc is empty, which is kind of how I like it. In Googling around, I found advice to add this to my .asoundrc: pcm.dmix0 { type plug slave.pcm "hw:0,0" } Seems like it'd be a neat way to force Wine to do what I want, without having to do what it wants. I tried it, though, and nothing. -ken

14 years, 7 months

Wah update

by Ken Restivo

Just a quick update on the wah research. A friend owns a Dunlop "Jimi Hendrix Wah", which says it is the "Original Thomas Design", by which I assume they mean to claim it's the same design as the Thomas Organ Wah, formerly Vox. This website's describes the frequency response as a lowpass with a resonant peak: http://www.geofex.com/Article_Folders/wahpedl/wahped.htm So here is what JAPA says it does (and I believe JAPA more than some random website): When fully closed, it's a bandpass, with a VERY high Q! http://restivo.org/misc/lowend-jimi.png But, wait, when I open it up, suddenly it becomes more like a highpass, but with a lot of resonance: http://restivo.org/misc/midrange-jimi.png When it's fully opened, it's definitely a highpass, but with a helluva peak: http://restivo.org/misc/high-jimi.png So, not only is the opposite of what that article says, but it's also kind of non-linear. I'll poke around the various LADSPA plugins and see if I can find something nearly like this. Another guitar-player friend has a different wah (IIRC, either a "Cry Baby", or a Morley), and I'll see if I can run his through this and see what it comes up looking like. -ken

14 years, 8 months

[ffado] Recommend FireWire Hardware from the Following

by Ray Rashif

It's that question again, and it's here for you to answer and gain cookie points! Here's my array of the chosen ones: ECHO AudioFire 4 [[ http://www.echoaudio.com/Products/FireWire/AudioFire4/index.php ]] Edirol FA-66 [[ http://www.rolandus.com/products/productdetails.aspx?ObjectId=731&ParentId=… ESI QuataFire 610 [[ http://www.esi-audio.com/products/quatafire610/ ]] Focusrite Saffire [[ http://www.focusrite.com/products/saffire/saffire/ ]] That was narrowed down from [[ http://ffado.org/?q=devicesupport%2Flist&filter0=&filter1=&op2=OR&filter2%5…. All these satisfy my need for mobility and at least 2 DI and MIC inputs. >From what I know, they pretty much cost about the same, or within 100-200 bucks apart. * All except the Focusrite are hybrid inputs, so it has the upper hand there. * Only the Focusrite has onboard DSP effects, BUT unsupported on Linux (ffado) * Only the ESI officially mentions support for Linux So here's the homework for you guys: Reorder the list in decreasing order of merit. Conditions include (in order of decreasing importance): * Preamp Quality * Linux Support Extent * Beauty * Portability If that one's too tough, then just pick 1 (or 2/3 depending on which of those you have firsthand experience with) =p Thanks and good luck!

14 years, 8 months

New Raggae from Germany... :-)

by Julien Claassen

Hello everyone! Here's some new music from me. Again something from a different season: http://juliencoder.de/the_vision.ogg (Unfortunitely no ogg-deficient version fromme :-) ) It's a piece about a better world, well about how it could be a bit nicer. Software used: Nama (as always) fluidsynth (for the bass) LinuxSampler (for drums and brass) and praat (for some voice editing) Lyrics: A world of trust With regard for the meak, Where the peoples are just And freedom is, what they seek. - A society where For the weakest we care, The parole we call: all for one, one for all! [Chorus] Yes we would, If we could Distribute and share our hope. Yes we would Stop sliding down the slope Yes we would make love a vision Of the world and future days, that we can see [ho ho ho :-) ] We're sure, you would agree: It might be nice. A time, when the queer Can move anywhere, Without any fear To be hanged on the square. - A place and a time For all warfare to rest. Let's put to the test This vision to rise... Flourish and shine [Chorus] [instrumental] [changed chorus] Yes we can, Like one man, Distribute and share our hope. Yes we can Stop sliding down the slope. Yes we will make love a vision Of the world and future days, that we can see We're sure you can agree: It will be nice Feedback, as ever is highly welcome and greatfully invited! Kindest regards Julien -------- Music was my first love and it will be my last (John Miles) ======== FIND MY WEB-PROJECT AT: ======== http://ltsb.sourceforge.net the Linux TextBased Studio guide ======= AND MY PERSONAL PAGES AT: ======= http://www.juliencoder.de

14 years, 8 months

music made with L (russian doom-folk made in berlin)

by Hartmut Noack

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello folks ;-) I understand that some are wondering, where the Linux-made music went... So here I have another track recorded with Ardour 2.8 under Linux using free Software, free Samples and some Guitars and voices excluselively: http://lapoc.de/demos/maria-katharsis-feelings-080709.mp3 The singer is from siberia: http://www.myspace.com/marachowska (still dwelling in the evil, not-so-good looking empire of imperator Darth Murdoch and the rotten HTML/JS-code from hell - the so-called "myspace") She sang the tune in her russian mother-tongue accompanied by herself on an accoustic guitar, miked with an AKG Perception 100 and an RFT DM122 so voice and guitar is not separated. A man named Vincent played a slideguitar and a metal-ish outro and I added some additional clean and heavy guitars using my Ibanez RG and Guitarix and AMS-Guitrack(C*-Plugins) and some fat Drumsamples using a Behringer U-Control and Specimen. Everything was recorded and mixed with Ardour 2.8 with some CALF and INVADA LV2-Plugins plus several LADSPA-Plugs(TAP, C* and SWH) for reverb, delays, FX and compression/EQ. In the end we mastered it with jamin. We hope you like it, *All* kinds of comments are highly welcome.... best regs HZN/Berlin -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAkpvh78ACgkQ1Aecwva1SWOopACdH2DknhYM+e8jYTysJQdtUy0c MZ4An1D5v8SnWgdvXln7WhnjItFkQeVW =giPw -----END PGP SIGNATURE-----

14 years, 8 months

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Linux-audio-user July 2009