Linux-audio-user April 2010

linux-audio-user@lists.linuxaudio.org

139 participants
124 discussions

by Alexandros Diamantidis

Hello all, I got a new computer recently, with onboard audio (ATI Technologies Inc SBx00 Azalia (Intel HDA) according to ALSA). I discovered that if there's no microphone connected, jack (jackdmp 1.9.5) doesn't run and outputs a continuous stream of "alsa_driver_xrun_recovery JackAudioDriver::ProcessAsync: read error, skip cycle". As soon as I connect a mic, it works normally. When starting it with the -P option (playback only), mic presence doesn't affect jack operation, but of course there are no capture ports available. It doesn't make much of a difference for me right now, but just for curiosity's sake, I'm wondering if it's possible to start jack without a mic and have capture ports appear automatically when one is connected. Thanks, Alexandros

13 years, 12 months

looking for fast spectrogram -> jpg/png/gif

by Niels Mayer

Are there any command-line tools to take a sound file (e.g. wav or mp3 format) and output a corresponding audio-range spectrogram as one or more image files, either jpg,gif,png ?? Yes, it would be a very "long" image, or a series multiple images, each w/ a minute of spectrogram representation of sound. Preferable would be something like what http://www.sonicvisualiser.org/ outputs in "Layer->Add Melodic Range Spectrogram-> All Channels Mixed" I'm aware of exellent tools like http://vamp-plugins.org/ && could certainly script something out of sonic-annotator, which would be too slow (the scripting and unnecessary I/O would be slow, not sonic-annotator itself). Anybody have a http://vamp-plugins.org/vampy.html script that accomplishes this task before I go off and reinvent the wheel. Or better yet, an all-C or C++ solution? One issue is how can a program automatically determine the best visualization of a spectrogram? Sonic-visualizer has controls like "Threshold" "Colour Rotation" and meter "Gain" that sometimes need to be tweaked. Anybody know where to find such a file->spectrum-image converter that automatically adjusts for best contrast between beats, bass, melody, so as to produce something that lets people easily visualize music features, without needing to do any manual adjustments?? Thanks, Niels http://nielsmayer.com PS: speaking of spectrograms: Music: Broken Symmetry, Geometry, and Complexity by Gary W. Don, Karyn K. Muir, Gordon B. Volk, James S. Walker Notices of the American Math Society, Jan 2010, Vol 57, Num.1 , pp. 30-49. http://www.ams.org/notices/201001/rtx100100030p.pdf http://www.uwec.edu/walkerjs/MBSGC/

13 years, 12 months

Fwd: [OT] announce: latest snapshot of the "TalkingArch" CD for blind users (fwd)

by Julien Claassen

Hello al! It's off-topic, but it's sound in a way and interesting - perhaps - toother blind users. Enjoy! Julien From: Chris Brannon <cmbrannon79(a)gmail.com> To: arch-general <arch-general(a)archlinux.org> Date: Tue, 27 Apr 2010 02:02:22 +0200 Subject: [arch-general] announce: latest snapshot of the "TalkingArch" CD for blind users Hi all, I'm proud to announce the April 2010 snapshot of my TalkingArch CD for blind users. This is more-or-less equivalent to the netinstall CD, with one major difference. The system provides spoken feedback as soon as you boot with the disk. I made some improvements to the project since the last release in the fall of 2009. First, I now provide an x86_64 image, as well as an image for i686. I learned that I could use qemu to build the 64-bit version. Second, the CD now includes a brltty package, for people who wish to use braille displays. Here's the link to my project: http://the-brannons.com/tarch/ If you're blind, please check it out. Likewise, if you know anyone who might be interested, please spread the word. -- Chris --- End forwarded message ---

13 years, 12 months

Anyone gotten the Tascam US-144mkII to work?

by Tobiah

I foolishly bought one, after great success with the US-122, but now I see that support is mostly non-existent. Thanks, Tobiah

13 years, 12 months

Yoshimi / Zynaddsubfx instrument creation

by Nathanael Anderson

I enjoy using Yoshimi on a regular basis, I'd really like to have a better grasp on instrument creation, and alteration. I'm not really sure how to begin creating "signature sounds" with it though. the arpeggio bank is by far my favorite default bank. Anyone have links to building synth's in zynaddsubfx or yoshimi. Ideally something that would walk from basic creation, to more complicated sounds. Thanks in advance.

13 years, 12 months

MIDI filter for live transposition?

by Jonathan E. Brickman

Greetings. My MIDI controller will not do transposition, and I would like to implement it by filtering the MIDI stream from hardware through Jack. Anyone have an easy way? J.E.B.

13 years, 12 months

[ANN] Qsynth 0.3.5 - Spring Cleaning Pt.2

by Rui Nuno Capela

Hello, Ashes to ashes, dust to dust, funk to funky. Yawn. Cut the non-sense, there's no burial service nor Bowie's song here. Just blowing some aging stuff, maybe giving the patine that it deserves ;) Almost one long year has gone by and sadly enough, there's no big new and flashy features to show off. But, nevertheless, Qsynth 0.3.5 is out from the closet! Hope you enjoy the (not so big) news :) Have fun. Description: Qsynth is a FluidSynth GUI front-end application written in C++ around the Qt4 toolkit using Qt Designer. FluidSynth is an excellent command line software synthsizer based on the Soundfont specification. Website: http://qsynth.sourceforge.net Project page: http://sourceforge.net/projects/qsynth Downloads: - source tarball: http://downloads.sourceforge.net/qsynth/qsynth-0.3.5.tar.gz - source package (openSUSE 11.2): http://downloads.sourceforge.net/qsynth/qsynth-0.3.5-2.rncbc.suse112.src.rpm - binary packages (openSUSE 11.2): http://downloads.sourceforge.net/qsynth/qsynth-0.3.5-2.rncbc.suse112.i586.r… http://downloads.sourceforge.net/qsynth/qsynth-0.3.5-2.rncbc.suse112.x86_64… - binary packages (Ubuntu 9.10): http://downloads.sourceforge.net/qsynth/qsynth_0.3.5-2.rncbc.ubuntu910_i386… http://downloads.sourceforge.net/qsynth/qsynth_0.3.5-2.rncbc.ubuntu910_amd6… Change-log: - Initial widget geometry and visibility persistence logic has been slightly revised as much to avoid crash failures due to wrong main widget hidden state. - General source tree layout and build configuration change. - Most modal message dialog boxes (eg. critical errors) are now replaced by system tray icon bubble messages where available. - Reverb and Chorus parameter ranges have been revised to match and comply with fluidsynth back-end (libfluidsynth). - Fluidsynth channel info and unset program interfaces are now in use where available (libfluidsynth >= 1.1.1, EXPERIMENTAL). - Global configuration state is now explicitly saved/committed to disk when Options dialog changes are accepted and applied. - Output peak level meters get their long deserved gradient look. - Automatic crash-dump reports, debugger stack-traces (gdb), back-traces, whatever, are being introduced as a brand new configure option (--enable-stacktrace) and default enabled on debug build targets (--enable-debug). - Added Czech (cs) translation, contributed by Pavel Fric. - The channel preset selector (Channels/Edit...) has been seriously crippled for ages, only showing the presets of the last loaded soundfont, now fixed. - Minimum number of MIDI channels allowed on engine setup has been dropped from the old value 16 to as low as 1 (one), not that it makes a difference, as (lib)fluidsynth internals just rounds it to the nearest multiple of 16 anyway. - Cleanup to knobs source, simplified from redundant stuff. Weblog (upstream support, yours truly): http://www.rncbc.org License: Qsynth is free, open-source software, distributed under the terms of the GNU General Public License (GPL) version 2 or later. Cheers && Enjoy. -- rncbc aka Rui Nuno Capela rncbc(a)rncbc.org

13 years, 12 months

[ANN] Neil - Buzz tracker (Aldrin fork)

by James Stone

Hi everyone, Just thought you might want to take a look at this project if any of you are interested in Buzz or trackers: http://sites.google.com/site/neilsequencer/ It's a fork of Aldrin, which has now been discontinued. The dev for neil is keen to concentrate primarily on making the platform stable and usable, and porting more plugins for it, rather than adding extra features. This suits me pretty fine. The project has to be checked out with mercurial. I found it builds pretty simply though, and is already more useful than aldrin (as some of the later "features" have been reverted, making the interface much more usable IMHO). Being written in Python, it's pretty easy to hack on. I'm not the main dev for this project - I just came across it, and have added a few minor patches - as I used to occasionally on aldrin. Hope that some of you might find this interesting. James

13 years, 12 months

Some fun with impulse responses

by Ken Restivo

I blogged a bit about the recent mixing project for Better Than Lahar: http://www.restivo.org/blog/archives/fun-with-frequency-responses Many thanks to Fons for JAPA and jconvolver, and to those on this list (Julien, etc>) who provided comments and lent their ears. All but two of the tracks are finished and posted here for your enjoyment: http://music.betterthanlahar.com I should have the last two up in the next few days. -ken

13 years, 12 months

[ANN] KMid 2.3.0 released

by Pedro Lopez-Cabanillas

KMid is a MIDI/Karaoke player for KDE4. It runs in Linux, using the ALSA Sequencer. KMid plays MIDI and karaoke files to hardware MIDI devices or software synthesizers. It supports playlists, MIDI mappers, tempo (speed), volume and pitch (transpose) controls and configurable character encoding, font and color for lyrics. The graphic views include a rhythm view (visual metronome), a channels window with solo/muting controls and instrument selectors, and a piano player window (Pianola). Changes for this release: * New Mac OSX and Windows backends * Fixes in ALSA sequencer backend: · don't set an explicit output pool size, using the default size instead. · unconditionally reload MIDI devices before checking the available outputs. Drumstick shared libraries v0.3.1 are recommended. More info: http://userbase.kde.org/KMid2 Copyright (C) 2009-2010, Pedro Lopez-Cabanillas KMid is free software distributed under the terms of the GPL v2 license. Downloads * Source packages http://sourceforge.net/projects/kmid2/files/ * openSUSE RPMs, and Ubuntu DEB packages: http://software.opensuse.org/search?baseproject=ALL&q=kmid Regards, Pedro

13 years, 12 months

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Linux-audio-user April 2010