Linux-audio-dev

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7516 discussions

[linux-audio-dev] M-audio transit/ozone/MobilePre experiences?

by Mannr＠uwaterloo.ca

Does the M-audio MobilePre work with Linux? Earlier there was a 'beta' released (by Clemens Ladisch): http://sourceforge.net/project/showfiles.php?group_id=87777&release_id=1833… So does it work with the MobilePre? I'm planning to buy one soon if it does. Thanks, Richard

21 years, 12 months

[linux-audio-dev] Using Jack for "Control Volt" signals?

by iainduncan＠telus.net

Sorry if this is the wrong place, please tell me where to ask if it is. I'm wondering whether it will be possible, ( or if anyone is doing something similar ) to use Jack to pass control signals between audio apps. I think it would be extremely useful to be able to send the equivalent of PD wires or Csound krate variables back and forth between different apps as if the were Control Voltages, allowing the functionality of outboard CV modulars with tools from more than one family. I am also interested in the possibility of extending the same to outboard hardware, ie having control signals generated and transformed between apps and then sent out as actual CV signals to outboard modular components. I've been working on a real time step sequencer in Csound that allows sophisticated real time sequencing of control signals in the fashion of step sequencers and would like to know how I can perhaps integrate my work with others. I am really just a Csound programmer, and not a C developer ( yet ) so please excuse me if this is noise on the list. ; ) Also, does or will Jack allow signals to be lower bit depth or sample rate when full audio resolutions is not necessary, or will it always be full audio? I'm just thinking that maybe it would be good to be able to pass control signals with less bandwith, but of course that would introduce other complications. Is there any limit to the number of ins and outs Jackable? I guess to make modular synthesis between various apps one would start using a *LOT* of them. Thanks, Iain Duncan

21 years, 12 months

[linux-audio-dev] linux-kernel comments on POSIX capabilities support (fwd)

by Kai Vehmanen

Crossposting from jackit-devel to here... ---------- Forwarded message ---------- From: Kai Vehmanen <kai.vehmanen(a)wakkanet.fi> Subject: [Jackit-devel] linux-kernel comments on POSIX capabilities support Not too encouraging.. :( http://kt.zork.net/kernel-traffic/kt20031101_239.html#3 Quoting Albert Cahalan: ""The authors of our code seem to have given up and moved on. Nobody cleaned up the mess. Is it any wonder the POSIX draft didn't ever make it beyond the draft state?"" -- http://www.eca.cx Audio software for Linux!

21 years, 12 months

[linux-audio-dev] Re: Dev Music

by Pedro Moreal

>You might want to take a look at some of the graphical sound systems, >then. For example Pd (www.pure-data.org) is very easy to set up and >yet very powerful. You could use some of the Pd extensions to create >images of sound or the other way around. GEM is very easy to get >started with, if you have an OpenGL enabled card. For reading from a >TV card (or webcam) PDP is nice. I will look your suggestions. Very thanks! >This is directly programming the soundcard hardware. Do you really >want to do that? In my opinion this could be too difficult for your >pupils, if they don't have a certain background with that. But I may >be wrong. Anyway, using something like Pd will still be a good >>experience, because you get to see the whole picture of sound >generation better. The Pd author Miller S. Puckette also uses Pd to >teach sound synthesis and such. See his upcoming book at >http://www.crca.ucsd.edu/~msp/techniques.htm Hummm... directly soundcard hardware??!!! :( I will test your suggestions, but... I just wanna one program can show one image when pupil play one C note ,or G, etc and maybe control intensity of color with gain of sound. Something that it can select colors, pictures and texts using pure notes played with guitar or harmonic or other instrument. Is not to produce images but to *select* images or colors (images too) or text. Is it programming direclty in soundcard hardware? Not exist some librariy done can make this job (send to my program one pure value represent the note played)? I don't want Midi sound, it is very horrible to hear :) I know, I want much. But to our project is very interesting give for pupil the possibily to choose the relation note/color/picture or note/word. Is it very hard? For me all in this audio-world is hard because I don't have much notion about hardware programming (I'm just one database specialist), but if it's possible just using done values sent of the one library, all is ok. >I'd be glad to hear about your experiences. :) You will hear my screams!! >I think, you will need some mathematics, but nothing too complicated. >A bit of trigonometry is very useful in computer sound but you can get >far with knowing just muliplication and summing. At least in Pd, that >is. >ciao So... very very very thanks for your atention. []'s Alexander

21 years, 12 months

[linux-audio-dev] Dev Music

by Alexander Franca Fernandes

Hi! Please, be patience with my horrible english. I want make one program that can get notes/sounds and put out in screen images. I don't have any idea how I can do this. What language, what libraries, and I don't have any Idea how work /dev/dsp. What the first step? This project is for pupils of school where I work. We want do one project where pupils can do more with computer. Actualy in majority of schools the work in computer just resume using this machine for make "office" jobs. The comunication, expression, human knowledge, is "puted" out. So... we want try destroy some concepts using computer with people between 12 and 16 yeas old. This program we want build is just one part of our project. So... if I can do this program, need I learn a lot of mathematic and fisic? Or I can do this just with knowlegde about programer. Thanks for any help! Alexander

21 years, 12 months

[linux-audio-dev] Linux on TI DSP boards

by Vincent Touquet

http://www.linuxdevices.com/news/NS3468265897.html Looks cool. A little proprietary, but it seems to have an SDK. vini

22 years

[linux-audio-dev] swh-plugins for jackEQ?

by Jack O'Quin

I'm trying to run jackEQ. If I use the current release of swh-plugins, it fails because dj_eq_1901 is missing. If I use the latest snapshot I can find on Steve's web site, swh-plugins-2003-10-21.tar.gz, this plugin exists. But using that, jackEQ and JAMin both segfault on startup. GDB shows a segfault in lookahead_limiter_1435.xml, line 110. So, what version of swh-plugins works for jackEQ? -- Jack O'Quin Austin, Texas

22 years

[linux-audio-dev] StreamIt - "compiler for modern streaming systems"

by Roger Larsson

(resent, previously sent from non member account) Found this on comp.arch "StreamIt is a programming language and a compilation infrastructure, specifically engineered for modern streaming systems. It is designed to facilitate the programming of large streaming applications, as well as their efficient and effective mapping to a wide variety of target architectures, including commercial-off-the-shelf uniprocessors, multi-clustered architectures, and the emerging class of grid-processors." http://cag.csail.mit.edu/streamit/ It does handle feedback loops among other things. /RogerL -- Roger Larsson Skellefteå Sweden

22 years

[linux-audio-dev] Re: aRts development (KDE)

by Roger Larsson

(resent, previously sent from non member account) On Tuesday 04 November 2003 20.13, Sean Meiners wrote: > Thanks, that helped. But it only seems to run if I stop the aRts server, > which seems to defete the purpose of having it. > > On another note, has anyone had any luck/experience with recording? I need > to be able to access and pull data from the microphone. Also, what about > controling the sample rate? I only want 8000Hz from the mic, anything more > is overkill for my needs. It is not trivial... :-( (but it is much better now KDE3.2b, then the last time I tried) First thing first (I forgot when testing...) * Control Center -> Sound System -> Hardware Tab -> Full Duplex !!! If you use KDE then read the KRec startup tips carefully. * Tools -> Audio Manager, click on KRec::In to select arts bus to record (in_soundcard) start Arts control tool (optional), on View there are some interesting tools with older KDE you access the Audio Manager from here. start KMix, to select what hardware source is routed to in_soundcard. Input: select source (Mic, I guess for 8kHz) and capture, adjust levels (I had to actually move the sliders - bug...), deselect others. Recording levels should move with your mic input... * File -> New (~ insert the tape) * And finally it should be possible to press the red record button. rewind the tape playback /RogerL > > On Monday 03 November 2003 08:55 pm, Jonas Christian Drewsen wrote: > > On Monday 03 November 2003 21:47, Sean Meiners wrote: > > > I've been pulling my hair out for the last week or so trying to find a > > > good, > > > > clean, and simple tutorial/example/manual on how to begin > > > > > developing an app that uses aRts. So far I haven't found anything > > > besides the idl and class documents, but those are really only usefull > > > once you get going. Is there anyone out there who's found/seen/wrote a > > > simple tutorial along the lines of this: > > > "http://doc.trolltech.com/3.2/how-to-learn-qt.html"? Or maybe just a > > > very simple little app that plays a .wav file from the command line? > > > Any help would be appreciated, even RTFM if it includes a link since I > > > haven't > > > > found a FM for developers yet (no, the KDE help docbook didn't > > > > > help). > > > --Sean Meiners > > > > I think this should work. An example of playing stuff using playobjects > > and one of how to play a simple sinusoid is attached. You may have to > > edit the Makefile. > > > > > > *** eSafe scanned this email for malicious content *** > > *** IMPORTANT: Do not open attachments from unrecognized senders *** -- Roger Larsson Skellefteå Sweden

22 years

[linux-audio-dev] [ANN] GNUsound 0.6.1 released

by Pascal Haakmat

Hi, GNUsound 0.6.1 was released. This is a maintenance release to fix a few critical bugs. I really wanted to skip this release and go straight for 0.7, but there's too much work to be done on that version still, and the 0.6 bugs are quite serious. Changes from version 0.6: Fixed bug where channels past 4 wouldn't play (by removing unrolled mixer_mux()'s, they hardly added any speed anyway). Fixed possible crash drawing markers (Jens Mauer). Fixed crash canceling "File Save" dialog. Fixed crash on machines with MMX but without MMX2 (original Pentium). Download at the usual place: http://awacs.dhs.org/software/gnusound Thanks, Pascal.

22 years

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Linux-audio-dev