Linux-audio-dev

linux-audio-dev@lists.linuxaudio.org

7516 discussions

by Juhana Sadeharju

Hello. I noticed libao is required by mpg321 and vorbis. About half of the time I start mpg321 I get the following: unix_connect: can't connect to server (unix:/tmp/mcop-juhana/localhost_localdomain-06be-400786ed) Can't find a suitable libao driver. (Is device in use?) Very annoying. Why libao fails? Why it is needed? Any alternatives? Regards, Juhana

21 years, 9 months

[linux-audio-dev] ".mid" files playing in Linux games

by Dominic Genest

Hello, I am programming some little games in Linux as a hobby, and I composed midi files that I would like to be played in the background. What is the easiest way to do this so that it works on all platforms for everyone ? I would like suggestions of real time synthesizers that can read ".mid" files. Does anybody know of any library that just does all the work to send wave output to sound cards from a ".mid" file ? Also, I would like not to have to supply instrument files. Thanks a lot for any answer or clue ! Dom -- Dominic Genest Étudiant 3e cycle Département d'Informatique et de Génie Logiciel Université Laval 97010111

21 years, 9 months

Re: [linux-audio-dev] ".mid" files playing in Linux games

by John Lazzaro

On Feb 1, 2004, at 4:01 AM, linux-audio-dev-request(a)music.columbia.edu wrote: > Ryan Underwood <nemesis-lists(a)icequake.net> wrote: > > Module files are usually a reasonable compromise between quality and > size for soundtracks. The disadvantage of tracker files compared to > MIDI is that they are larger since they contain the samples. The > advantage is that you know they will sound identical no matter where > they are played and whether or not the end user has MIDI hardware or > not. MPEG 4 Structured Audio (SA) was designed to solve this problem, in that its normative (sounds the same everywhere), but if you have algorithmic synthesis techniques you like, there's no need for samples, and so the files can be very small. SA been through a few Corrigenda (i.e. bug-fixes to the standard), so its a pretty stable standard now. See: http://www.cs.berkeley.edu/~lazzaro/sa/index.html Note: I'm not an MPEG member, the paragraph below is my own personal opinion, and doesn't reflect MPEG's view on the topic: I'm starting to think that what could help SA find its way into applications is a strict sub-setting of the language -- pick a simple to implement subset of keywords and opcodes that solve a lot of useful problems, and code up interpreters and compilers that accept only the subset. The content would be upward-compatible with full SA decoders (like sfront), but if the subset was well chosen, the complexity of implementing SA would shrink to the point where a motivated undergrad could do it as a senior project. The hope would be that once there was momentum, the people-power to do full implementations would appear, or the will to standardize the subset in MPEG would appear. --- John Lazzaro http://www.cs.berkeley.edu/~lazzaro lazzaro [at] cs [dot] berkeley [dot] edu ---

21 years, 9 months

[linux-audio-dev] branch-free denormal killer

by Simon Jenkins

Had the idea that you could kill denormals without branching if you didn't mind "injuring" nearby numbers that weren't quite denormal: /* branch-free denormal killer */ inline float FlushToZero( volatile float f ) { f += 9.8607615E-32f; return f - 9.8607615E-32f; } /* end */ This function leaves anything higher than 9.8607615E-32 (ie 2 ** -103) completely unchanged. Numbers below this value lose one bit of precision for each binary order of magnitude they are below it. This has the effect that denormal numbers lose *all* their precision, ie they become zero. Simon Jenkins (Bristol, UK)

21 years, 9 months

[linux-audio-dev] Ann: Specimen v0.1.0 (the first beta release)

by Pete Bessman

Too everyone who's waited with bated breath for this day to come (primarily me), rejoice in the first beta release of Specimen, a midi controlled audio sampler for GNU/Linux systems. Features as listed on the webpage: # ALSA sequencer interface support. # Audio output via ALSA or JACK. # Individual panning and volume controls for each patch. # High quality cubically interpolated pitch scaling. # Sample start/stop and loop points. # Three playback modes; "normal" just plays the sample, "trim" plays the sample and stops early if so instructed, "loop" plays the sample for the requested duration. # Patch bank saving and loading in the "beef" file format. Check out www.gazuga.net for more and to download the source. I'm gonna spend the next few days giving the program a usability test and creating a demo song that does it justice, so keep your ears open for some homegrown UHB in the not-too-distant future. [pb]

21 years, 9 months

Re: [linux-audio-dev] creamcheese

by James W. Morris

creamcheese... little bit twee, perhaps, but, nice and pleasant, definately category C for chilled, reminded me of aphex twins rarer chilled moments. I liked it. But the ending , suffered a little from what I've come up against when I've done tracks, and thats not quite knowing how to end it? leaving it slightly unresolved sounding. But that's after just one listen, so don't take what I say too seriously ;) jwm ~(sirromseventyfive)~ >Would this (http://dis-dot-dat.net/creamcheese.mp3) do for b or c? >The call seems to want classical for category b, so probably c would >fit best. > >If anyone else would like to have a listen, I'd appreciate that very >much. Comments, criticism, cheques are all gratefully accepted :) _________________________________________________________________ Express yourself with cool new emoticons http://www.msn.co.uk/specials/myemo

21 years, 9 months

Re: [linux-audio-dev] creamcheese

by James W. Morris

Sorry, forgot to mention I liked the putch bends too! ~(sirromseventyfive)~ _________________________________________________________________ It's fast, it's easy and it's free. Get MSN Messenger today! http://www.msn.co.uk/messenger

21 years, 9 months

[linux-audio-dev] 2nd LAD conference

by Matthias Nagorni

Hello, as announced earlier, the 2nd Linux Audio Developers conference will take place from 29. April to 2. May 2004 at ZKM (Center for Art and Media), Karlsruhe, Germany. In addition to the "Call for Papers" there is also a "Call for Music". Both are open until 29. February. We are looking for music that has been done with Linux Audio software and intend to present it in a concert at the "Kubus" concert hall of ZKM. "Live" performance with Linux Audio software is welcome as well. More information on the conference, registration, accomodation and the "Call for Music" is available from www.zkm.de/lad The current list of speakers (in alphabetical order) and talks is as follows: Fons Adriaensen, 1) AEOLUS - a church organ in your PC 2) Using JAAA for audio measurements Frank Barknecht, Rapid and Reuseable Audio Development With Pd Julien P. Claassen, Linux console - a textbased studio Paul Davis, Adding MIDI to a Digital Audio Workstation Orm Finnendahl, 1) Linux as a Workstation for Composers 2) PD Workshop Bob Ham, LADCCA Steve W. Harris and Jörn Nettingsmeier, Audio Engineering in a Nutshell Steve W. Harris, JACK, JAMin, Mastering Takashi Iwai, ALSA Sucks? - Trouble Shooting for Your Healthy Music Life Jaroslav Kysela, ALSA project - the last year Victor Lazzarini, Developing Spectral Signal Processing Applications Matthias Nagorni, Introduction to Modular Synthesis Han-Wen Nienhuys, LilyPond, a modular, extensible and programmable compiler for high-quality music notation Dave Phillips, 1) Keynote: One Year After: Notable Linux Audio Development in 2003 2) Still Nailing Jelly: An Update on Linux Audio Documentation Projects Abstracts and links to the respective projects are available at www.zkm.de/lad Matthias -- Dr. Matthias Nagorni SuSE Linux AG Maxfeldstr. 5 phone: +49 911 74053375 D - 90409 Nuernberg fax : +49 911 74053483

21 years, 9 months

[linux-audio-dev] Lionstracs Mediastation, LinuxSampler, Linux at NAMM

by Benno Senoner

Hi, just back from NAMM, just a few infos for the interested people: Lionstracs had a booth demoing a preliminary version of the Mediastation X-76 ( http://www.lionstracs.com ) I've read a thread here about people complaining about the price of the keyboard. ( $12,000). I fully agree, the problem was the distributor trying to ask an exaggerated price. Too many men in the middle (distributor, retailer) each one wants a big cut of the pie while the producer of the actual iron usually earns only a fraction of the price the user pays. But you know since the distributor hosted Lionstracs at his booth you cannot complain about the price they want to set :-) Anyway see Domenico's (Lionstracs head) posting: http://www.lionstracs.com/index.php?name=PNphpBB2&file=viewtopic&t=7 the new price will be around $6200 which is much more in line with current keyboards. AFAIK: Korg's flagship the PA X-Pro is about $4500, add mp3 playback expansion, sample RAM expansion (from 16MB to 32MB :-) ) and you get into the $5000 - $5500 which is comparable to the Mediastation X-76 price but the X-76 much more iron (256 DSP voices vs 64, 512MB sample RAM vs 48MB sample ROM, not to mention what you can do in software with the Athlon 2400+ CPU (LinuxSampler, softsynths, ardour etc). Anyway if you want to see a couple of videos of the Mediastation X-76 in action (with crappy audio since it was taken with a camcorder in the noisy NAMM halls): (the guys were playing the keyboard over an mp3/wav song that ran in the background, changing the sounds interactively (mostly by pressing one single button , eg organ family, and then select organ patch) You can play them with mplayer/xine too but I think you need the win32 codecs installed. Length: 2:22 size 23MB http://www.lionstracs.com/~demos/video/x76smooth1.AVI Length: 4:58 size 48MB http://www.lionstracs.com/~demos/video/x76delmar1.AVI (The GUI at 3:00 in the second video is Paul Davis that tells the keyboarder to shut up with his 120dB noise :-) ) Domenico told me probably they will sell individual parts too so people can build their own keyboard without paying an arm and a leg. (eg case + MIDI keys + LCD , custom VGA with Linux supported GFX chip etc) As said this company tries to be open as possible and its success depends on the success of linux audio too, so I think it's in their interest to support LAD people. For example developers could get discounted keyboards in exchange of code etc, there are many possibilities. Domenico is in talks with Mathias Nagorni about coming at the upcoming ZKM with a Mediastation to show it off and that he can meet developers offer some paid work for developing new apps (or adapt existing ones) for the keyboard etc. BTW: many top engineers of the big 3 keyboards makers came to see the X-76, seemed quite puzzled that a penguin-powered keyboard exists :-) regarding LinuxSampler & NAMM read this: http://sourceforge.net/mailarchive/forum.php?thread_id=3758500&forum_id=127… I was quite surprised about the positive reaction. Other Linux stuff was Plugzilla, a hw expander (a Linux PC) that runs VST plugins (I've meet Marc Lindahl and Joe, very nice people), then there was the Muse Research box which is AFAIK similar to Plugzilla and the Hartmann Neuron was there too but I have not had the time to chat with them. (it is linux powered too but they don't tell you so on their website). ok shutting up :-) cheers, Benno http://www.linuxsampler.org

21 years, 9 months

[linux-audio-dev] TAP plugins (follow-up)

by Tom Szilagyi

First of all, a big thank-you goes to Steve Harris for checking my RDF. Second, tap-0.2.0 is out: * New plugin TAP Scaling Limiter This should be an efficient tool for those who want to maximize the loudness of their mixes without audible artifacts, but can be used for other things as well * Added a Bode diagram of the TAP Equalizer filters to the manual. * Changed versioning from x.y-z to x.y.z. Thanks to Frank Barknecht and others for complaining, and sorry I wasn't aware of this problem. The almost but not completely unmemorizable URL is still: http://www.hszk.bme.hu/~st444/tap/tap.html (but i'm thinking about whether i should put it up on SourceForge...) Tom

21 years, 9 months

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Linux-audio-dev