Linux-audio-dev

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7444 discussions

Re: [LAD] Host 128.173.232.121 is unreachable via http or smtp ports

by Ivica Ico Bukvic

Thanks Ron for the info, we are already aware of this issue and are working on it as fast as we can. As unlikely as it sounds, it appears we've had a major thunderstorm that has knocked out several buildings on campus, including the building hosting our server. Unfortunately, I've been out of the country and unaware of this occurrence until it was brought to my attention yesterday. Let me say that this is a very unusual and very much unexpected occurrence. That being said, based on this unfortunate development we will look to invest into better UPS asap to minimize any potential downtime in the future. As of 4:58PM the server should be back up and running. Best wishes, Ivica Ico Bukvic, D.M.A. Composition, Music Technology, CCTAD CHCI, CS, and Art (by courtesy) Director, DISIS Interactive Sound & Intermedia Studio Virginia Tech Dept. of Music - 0240 Blacksburg, VA 24061 (540) 231-6139 (540) 231-5034 (fax) ico(a)vt.edu http://www.music.vt.edu/faculty/bukvic/ > -----Original Message----- > From: Ron Fox [mailto:rfox@aloha.com] > Sent: Tuesday, July 01, 2008 9:08 AM > To: ico(a)vt.edu > Subject: Host 128.173.232.121 is unreachable via http or smtp ports > > Aloha Dr. Bukvic, > > I've been trying to reach the www.linuxaudio.org and > lists.linuxaudio.org websites for a few hours without success. I'm > sending this just in case you aren't aware of the situation. > > Mahalo, > Ron Fox

16 years, 3 months

libsndfile-1.0.18pre7 patch

by Fons Adriaensen

Libsndfile-1.0.18pre7 has some regression w.r.t. earlier prereleases. - When writing a WAVEX it always writes the Ambisonic GUID, and sets the channel mask to 0. Since it can also read this and you can't get the channel mask value, this will go unnoticed until you use some other lib to read the file. - When reading it always tells you the file is not Ambisionic. The attached patch will fix this AFAICS. Ciao, -- FA Laboratorio di Acustica ed Elettroacustica Parma, Italia Wie der Mond heute Nacht aussieht ! Ist es nicht ein seltsames Bild ?

16 years, 3 months

hosts for LV2 synths

by Pau Arumí

Hi all, I want to try LV2 synths and try developing new ones. The plugins API and compilation seems all pretty clear, but I don't know what are the existing host options. I was about to try zynjacku with jack-keyboard. Is it compatible with any LV2 synth? Are there sequencers connectable to zynjacku? (that is: jack-midi enabled?) http://home.gna.org/zynjacku/ http://pin.if.uz.zgora.pl/~trasz/jack-keyboard/ Thanks! Pau

16 years, 3 months

Bit OT: cleaning code for gcc4

by Julien Claassen

Hello everyone! I'm just working on some older code, trying to clean it up for GCC4.2.3. I get a lot of warnings like this: CuSE.cxx:321: warning: deprecated conversion from string constant to 'char*' Not this line but still same kind of error: char* choices[] = {" [ ] ", " [*] "}; The line 321 WARNING was using the defined choices and another char* array used in a newCDKSelection call. How can I clean this up? Thanks and 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

16 years, 3 months

Linux Plumbers Conference CFP

by Lennart Poettering

Heya! Anyone doing (audio) infrastructure work on Linux? If so, please make sure to join us at the Linux Plumbers Conference in Portland/Oregon in September. I will be doing an Audio track there and would like to make sure that everyone who does audio infrastructure work will submit a paper, or at least attend, or maybe just know about this conference! It's a conference about the kernel-userspace interfacing, about the lower levels in our software stack. For further details, checkout the conference website: http://www.linuxplumbersconf.org/ Or this blog story of mine: http://0pointer.de/blog/projects/plumbersconf.html Spread the word! Thanks, Lennart -- Lennart Poettering Red Hat, Inc. lennart [at] poettering [dot] net ICQ# 11060553 http://0pointer.net/lennart/ GnuPG 0x1A015CC4

16 years, 3 months

Sources of Paul "mda" Kellett's plugins have been released

by Frank Neumann

Hi list, not sure if this was mentioned here before (I hardly find the time to read the LA* lists regularly these days), but someone from IRC let me know that the VST/VSTi plugin suite by Paul Kellett has been released by its author as source, see here: http://sourceforge.net/project/showfiles.php?group_id=230958 I don't have a Windows-based audio system so I cannot judge about the quality of his plugins, but I am pretty confident (from what I know and read about his work) that these could be pretty fine, perhaps an interesting alternative or addendum to, say, the swh-plugins. Should be a cornucopia for interested LADSPA/LV2 porters, anyway :-). As it seems, there is already a binary of a ported package at http://linux-vst.com/download/mda_linux.tar.gz No idea who managed to convince Paul to do this, but big thanks to both of you for arranging this! This should be a quite valuable resource, for DSP coders and finally also for users. Regards, Frank

16 years, 3 months

Re: [LAD] starting out with tux audio

by AlgoMantra

[[[again, meant for the list. Dunno why Gmail is defaulting weirdly....]]] On 6/18/08, AlgoMantra <algomantra(a)gmail.com> wrote: > > Do you have any midi-keyboard around? Because stdio won't tell you that >> a key has been released, only that it has been hit. > > > Interesting!!! It'll be fun to find a way around this. > > > This limits the "toy >> Casio experience" somewhat ... There is of course a workaround - given >> that you have root permission, you could read the keyboard >> from /dev/input/ instead. This is unfortunately a bit like having a >> "keyboard sniffer" installed, which may not be ideal in your >> environment. Next step up the ladder I think is fullblown X ... >> >> A virtual midi-keyboard would solve that, perhaps vkeybd? > > > Just for myself, I would love to play with a lot of different external > HIDs actually..I'm planning to code for playing C code music with > one of those old Nintendo joysticks modded for USB. It's quite > cheap here (around $8 USD). > > But the class I teach coding barely knows how to TYPE!!!! Grrrr.... > > > -- >> ------- -.- >> 1/f ))) --. >> ------- ... >> http://www.algomantra.com > > -- ------- -.- 1/f ))) --. ------- ... http://www.algomantra.com

16 years, 3 months

starting out with tux audio

by AlgoMantra

I'm a newbie to audio in linux. I can code in C, and I know that if you $cat /dev/dsp you can see your microphone feeding weird shit into this sound device. I've also read that this device is encoded as 8-bit unsigned, and I know the binary math of that format. I'm currently coding on Ubuntu Hardy. I'm looking for some helpful tips on two simple processes, for which I'll be very grateful: 1. What are these weird "{{PP--"characters in /dev/dsp and how do I convert them to some numerical form that I can understand and play with? Are they ASCII representations of 8-bit unsigned numbers? How do I convert this to samples? (I know a "little" DSP theory, but kindly assume that I'm not very good). 2. I'd like to feed a pure sine wave to /dev/audio, and then another wave and mix them together to hear some beats. Basically, I want to try out raw additive synthesis using C and feeding cool arrays to either /dev/audio or /dev/dsp. Any help would be appreciated, and as for karma, you know you're only going to profit. ta-da, fadereu ------- -.- 1/f ))) --. ------- ... http://www.algomantra.com

16 years, 3 months

[ANN] libsmf-1.1

by Edward Tomasz Napierala

Version 1.1 of libsmf can be downloaded from: http://pin.if.uz.zgora.pl/~trasz/libsmf/libsmf-1.1.tar.gz Libsmf is a library for loading and writing Standard MIDI Files, i.e. files with the ".mid" extension. The only dependancy is glib. It was tested under Linux, FreeBSD and Solaris. Please note that, by default, libsmf is built with lots of asserts, which make it slower; for example, inside smf_save, there is some code that loads the newly saved file and compares it with what it was supposed to save. If some operation takes noticeable amount of time, try to recompile libsmf with -DNDEBUG to disable asserts. http://pin.if.uz.zgora.pl/~trasz/libsmf/ API documentation is here: http://pin.if.uz.zgora.pl/~trasz/libsmf/doc/ -- If you cut off my head, what would I say? Me and my head, or me and my body?

16 years, 3 months

recording impulse responses

by Michael Iber

Hello list, later that summer I will have the chance to record some impulse responses of some ancient technical gear like radios, grammophones etc. The question is, where to start with the recording chain: e.g an IR from the "Volksempfaenger"-Radio: does it make sense to play the sweep into an transmitter (of the very same period) and record the output with the microphone near the speaker of the radio? Or would one prefer to play the sweep diretly to the amplifier of the radio? How do I get a meaningful IR from a grammophone: start with the needle? try to find a vinyl record with a sweep on it? I am quite curious about your opinions on that subject, or any hint to some literature, I have not found yet.... Cheers, Michael

16 years, 3 months

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Linux-audio-dev