Linux-audio-dev

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2 participants
7534 discussions

[linux-audio-dev] How to test resampling quality?

by James Courtier-Dutton

Hi, I was wondering if there are any tools out there to test audio resampling quality. I am particularly interested in 44.1kHz to 48kHz resampling due to the fact that most sound cards prefer 48kHz. At least with up sampling (low rate to higher rate) one does not get aliasing. I really just want to find some algorithm that I can use to compare 44.1kHz audio signal with an 48kHz audio signal, and to see if there has been any lose of quality during the up sample. James

19 years, 4 months

[linux-audio-dev] pink noise generation

by Andrew Gaydenko

Hi! Can anybody point me to theoretical and algorithmic fundamentals of real-time (JACK-oriented) (pseudo)pink noise generation at given frequency range? Andrew

19 years, 4 months

[linux-audio-dev] vertical scaling snd competitors

by Andrew Gaydenko

Are there sound editors with horizontal scaling support as snd (http://ccrma.stanford.edu/software/snd/) has? I mean *both* scaling degree (1e4 times) and scale itself printing.

19 years, 4 months

[linux-audio-dev] [ANN]: Kontroll updated

by Florian Schmidt

Hi, this is a small announcement for a minor update for a minor piece of software, and at the same time a question :) So here it goes: Kontroll is a small utility that generates midi cc messages from the mouse position. It is inspired by the MouseX and MouseY UGens in Supercollider. It simply creates an alsa sequencer port which you can then connect with your favourite patchbay. The mouse position is independent of window focus and is relative to the screen origin at the upper left. - Another small update to kontroll. Now the controller and channel numbering range from 1-128 and 1-16 as commonly seen in other midi applications and hardware. previously it as 0-127 and 0-15 which was probably confusing to non computer people. - A minor update to this little program of mine called “Kontroll”. On shutdown it saves the last used parameters to a file called ~/.kontroll and on startup reads it again. This saves setting it up all over again on each start of the program. You can also save special setups via the “File” menu. Grab it here: http://tapas.affenbande.org/?page_id=42 Or directly: http://affenbande.org/~tapas/kontroll.tgz And here's the question: A user suggested (and i'd like this idea very much) that kontroll be able to make use of other input devices attached to the computer (additional mice, joysticks, etc). Now i would like to avoid playing with /dev/input directly, cause i imagine it to be a drag. So does anyone of you guys know a small and easy to use input-library that makes accessing these devices a breeze? If so, please let me know. Regards, Flo P.S.: Ah, LASH support is still missing. Will add it right away (or at least try) ;) -- Palimm Palimm! http://tapas.affenbande.org

19 years, 4 months

[linux-audio-dev] Snack Audio

by Yosvany Llerena Rodríguez

Hi All. I'm using Snack Audio 2.2 and Tcl/Tk to develop some application, I need to record a few seconds of voice but it's impossible y record an empty file. -- Snack Audio -- vtcl(GUI for Tcl/tk) -- Suse Linux 10.1 I use this Tcl code. package require snack snack :: sound s proc ::Record {} { global widget snack::sound s proc sstop {} { s stop set filename "tmpwave.wav" s write $filename s destroy // Extract } after 5000 sstop s record best regards Yosvany

19 years, 4 months

[linux-audio-dev] WINE and ASIO

by Dave Phillips

Greetings: Recently I tested Robert Reif's ASIO driver for WINE. It works okay for some small test apps (asiosiggen and asiodump). I also tested it with NI's FM7, the app opens fine but I got no sound from it. I even loaded and played a MIDI file as a demo but still got no joy from the audio. I'm curious to try other ASIO-driven apps but I need some recommendations for light-to-middle weight programs for testing. Free/shareware is best, but feel free to suggest commercial apps too. I don't use Win/Mac music apps and I have no idea where to start. Best, dp

19 years, 4 months

[linux-audio-dev] recommend a card with the best SPDIF out

by Andrew Gaydenko

Hi! Please, recomend a sound card with the best SPDIF out. Must be supported: - ALSA support, - stereo playing back, - up to 96KHz sample rate, - up to 24 bit depth, - coaxial SPDIF out (optical is optional), - of course, without resampling, - (most important) minimal jitter. Assumed using is a stereo playing back with an external DAC. Preferably, without an overloading (MIDI, multiple analog ins/outs and so on). Moreover, ADC/DAC may be absent at all :-) USB (rather PCI) variants are acceptable also. Thanks in advance! Andrew

19 years, 4 months

[linux-audio-dev] Re: [linux-audio-user] [ANN]: Kontroll updated

by Florian Schmidt

On Sunday 24 September 2006 20:36, Florian Schmidt wrote: > P.S.: Ah, LASH support is still missing. Will add it right away (or at > least try) ;) done. have fun. Flo -- Palimm Palimm! http://tapas.affenbande.org

19 years, 4 months

[linux-audio-dev] [ANN] QLoud v.0.17 - harmonics (distortions) plotting is added

by Andrew Gaydenko

QLoud is a tool to measure loudspeaker frequency response and (yes!) distortions. Find it here: http://gaydenko.com/qloud/ Changes: - harmonics (distortions) plotting is added, - as a result, noticeable part of common code was refactored/rewritten. Direct screenshot link to harmonics plot: http://gaydenko.com/qloud/screenshots/shot03.png If you have a sound card with good DAC and ADC, you can plot harmonic distortions for another audio equipment, say, for your power amplifier - cited screenshot has also harmonics plot for loopbacked sound card. Andrew

19 years, 4 months

[linux-audio-dev] Re: recommend a card with the best SPDIF out

by Ben Loftis

Andrew, get the M-Audio Audiophile 2496. It is well supported and does exactly what you need. You can find them cheap used. Be aware the Audiophile 192 is NOT supported. -Ben

19 years, 4 months

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