Linux-audio-user February 2022

linux-audio-user@lists.linuxaudio.org

24 participants
21 discussions

by Will Godfrey

Does anyone know of software that can generate MIDI messages from a touchpad? The idea would be to send CCs to a sequencer or soft synth, but being able to send it to an external hardware device would also be very useful. -- Will J Godfrey https://willgodfrey.bandcamp.com/ http://yoshimi.github.io Say you have a poem and I have a tune. Exchange them and we can both have a poem, a tune, and a song.

2 months, 1 week

Steinway_IMIS2.2 soundfont (no loops fix)

by Roberto Gordo Saez

This is Steinway_IMIS soundfont, version 2.2. ftp://musix.ourproject.org/pub/musix/sf2/Steinway_IMIS2.2 This version fixes the issue with loops. I hope this is the good one and there are no more remaining major bugs. Marcos is a little busy right now, so he asked me to make this fix. He is thinking to make other improvements, so expect more updates soon.

1 year, 8 months

Raspberry PI and PISound

by worik

Is anybody out here in LAU land have experience with PISound? https://www.blokas.io/pisound/ I have just bought one and am having quite sever teething problems with it. It keeps freezing for ~45 seconds when running X and I cannot get it to use the full display. cheers Worik -- If not me then who? If not now then when? If not here then where? So, here I stand, I can do no other root(a)worik.org 021-1680650, (03) 4821804 Aotearoa (New Zealand)

1 year, 11 months

LinnStrument on Linux

by Thomas Poulsen

Dear list, I recently bought a LinnStrument from Roger Linn Design: http://www.rogerlinndesign.com/linnstrument.html It is a great isomorphic midi-controller, and as such it is immediately recognized on Linux. The distinguishing feature of the LinnStrument is that it senses 3 degrees of freedom on each note: x-direction, y direction and z-direction (pressure). The x-direction is mapped to pitch-bend, and y-direction to CC74. A cool feature is the "slide", where the pitch-bend is used to slide between all notes in a row. To allow individual pitch and CC74 values for each note, it sends each note on a separate midi-channel ("MPE"): http://www.rogerlinndesign.com/implementing-mpe.html Bitwig has added support for this, and there is 20 presets in version 1.3.11, where this is used (tag: linnstrument). The LinnStrument controller is not recognized automatically on Linux in version 1.3.11, but it can be configured manually, and then it works fine. Note that both midi-in and midi-out has to be configured, if not there is no sound! It should look like this: https://ibin.co/2msBJVgpKtf9.png Now I would like to also use it with the free Linux synths. Here's what I have been able to make work this far. Synthv1: PME works reasonably well: I can play polyphonic in MPE mode, but it tends to miss the "note off"s. I can get the slide to work, by setting <param index="36" name="DEF1_PITCHBEND">2</param> <param index="78" name="DEF2_PITCHBEND">2</param> is a preset. Zynaddsubfx: I can not get MPE to work. Sending only on one channel, and setting PWheelB.Rng to 2400 cents, I cant get the sliding to work, but only when playing with one finger. If I enable MPE on the LinnStrument there is only an occasional sound, when it happens to send on the channel, that Zyn is listening on. I'll love to hear if other LinnStrument users have been able to do more with any of the free synths on Linux. All the best, Thomas

2 years, 2 months

Analysis of monophonic audio signals on the commandline

by Jeanette C.

Hey hey, I am looking for tools to analyse bird song. I have many recordings, which can probably be cleaned up enough to have single calls as good as isolated. On the other hand there are quite a few sonograms of bird calls, used to identify species. What I am looking for is a kind of mathematical analysis tool to get an idea of frequency and volume, perhaps with an estimate of curves. I suppose that requires statistical analysis. This is far from my forte, so I wouldn't know which keywords for the relevant math to enter and in which tool to look. Are there audio specific programs? Or is a math package like R, octave or maxima able to handle such data input and the task? If you are not immediately aware of a relevant tool, but could supply me with a few keywords and considerations, that would already be quite helpful. Best wishes, Jeanette -- * Website: http://juliencoder.de - for summer is a state of sound * Youtube: https://www.youtube.com/channel/UCMS4rfGrTwz8W7jhC1Jnv7g * Audiobombs: https://www.audiobombs.com/users/jeanette_c * GitHub: https://github.com/jeanette-c There's a girl in the mirror I wonder who she is Sometimes I think I know her Sometimes I really wish I did <3 (Britney Spears)

2 years, 9 months

Re: [LAU] Analysis of monophonic audio signals on the commandline

by bil＠ccrma.Stanford.EDU

I think what Fons says is correct. You can get close using just a sine wave and two complicated envelopes for amplitude and frequency. I did a bunch of bird songs this way back around 1980 -- see bird.scm in the Snd package. These are in Scheme using CLM, but it should be easy to grab the envelopes and use them elsewhere. The Snd package also has animals.scm: much more sophisticated attempts to synthesize birds, frogs, insects, etc. There's a brief discussion of that file in sndscm.html#animalsdoc also in the Snd package. But in any case, listen to say a hermit thrush or a red-winged blackbird slowed down and transposed down -- unbelievably beautiful! I really had a blast trying to synthesize these songs.

2 years, 9 months

qtractor build failure

by Will Godfrey

Anyone seen this build error, and if so, what's the problem? class Ui::qtractorMidiEditorForm’ has no member named ‘viewNoteNamesAction’; I'm building the current 'master' -- Will J Godfrey https://willgodfrey.bandcamp.com/ http://yoshimi.github.io Say you have a poem and I have a tune. Exchange them and we can both have a poem, a tune, and a song.

2 years, 9 months

kernel 5.15 irqs

by Len Ovens

In older kernels running: pa ax |grep irq will show a process for each irq in the form: 548 ? S 0:00 [irq/16-snd_ens1] however, with kernel 5.15 most of these are gone except the one for mei_me. This means that rtirq doesn't work and my device suffers from more xruns than normal. Has anyone else experienced this? -- Len Ovens www.ovenwerks.net

2 years, 9 months

jitsi-meet videoconferencing and jackd losing mic input

by Peter P.

Hi, for the last two years I was able to run the excellent and floss jitsi-meet videoconferencing tool using the jack audio server by installing the "jack" alsa plugin, and telling jitsi-meet to use it as default via my ~/.asoundrc holding the following: pcm.!default{ type plug slave { pcm "jack" } hint {description" jack with software conversions added by me" } } Since the last two or three jitsi-meet upgrades (which are hard to trace because they happen forcibly and in the background without user notification) the software will lose its microphone input a few seconds after the mic is unmuted, tracable by a vanishing audio connection in jack's gui qjackctl. When this happens I see jackd posting subgraph starting at alsa-jack.jackC.468772.0 timed out (subgraph_wait_fd=17, status = 0, state = Triggered, pollret = 0 revents = 0x0) 09:27:13.048 JACK connection graph change. **** alsa_pcm: xrun of at least 393698.976 msecs 09:27:13.052 XRUN callback (8). 09:27:13.232 JACK connection change How can I go about debugging this further? Thank you a lot! P

2 years, 10 months

[music] Let's dance (on four): disco funk with romantic piano

by Jeanette C.

Hey hey, I'd like to present let's dance (on four): https://youtu.be/mXjZJasO00M OGG version: https://www.dropbox.com/s/w3l8fy0zy5y1nq8/lets_dance-on_four.ogg This piece takes many inspirations in style and melodies, though it is not a cover of anything. The style is taken from 70s disco funk as played by the Munich Music Machine, a collecitve who cover classical pieces in their style. The piano theme is inspired by late romantic piano compositions. There are actually two small quotations from radio jingles of old (until early/mid 90s) from the public German radio station WDR4, which explains the title. Technically, LinuxSampler brings us the grand piano and the electric ones (both Rhodes and Wurlitzer) as well as the drums. The drum kit was especially assembled for this tune. The bass is courtesey of Fluidsynth and the naturally decaying bass soundfont. Yoshimi perfectly shines as a string machine. Both arpeggios and lead synths are hardware, the Behringer Neutron and Aruturia MiniBrute 2s. In terms of plugins, I had to discover a few new ones and find new uses for old horses to achieve that distinct 70s sound. Even with good raw material it took quite a bit of processing to approximate the sound to the best of my abilities. Judge for yourself... Best wishes, Jeanette -- * Website: http://juliencoder.de - for summer is a state of sound * Youtube: https://www.youtube.com/channel/UCMS4rfGrTwz8W7jhC1Jnv7g * Audiobombs: https://www.audiobombs.com/users/jeanette_c * GitHub: https://github.com/jeanette-c Here I go, on my own now <3 (Britney Spears)

2 years, 10 months

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Linux-audio-user February 2022