Linux-audio-user August 2023

linux-audio-user@lists.linuxaudio.org

15 participants
13 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.

1 year, 3 months

[LAU] qjackctl system tray icon missing dependency on Debian

by Peter P.

Hi list, for anyone wondering why qjackctl 0.9.9-1 on Debain stable (bookworm) does no longer display its icon in the systray after starting: The package libqt6svg6 is required but sadly not a dependecy of the qjackctl package. Rui, thank you for your amazing work, using your tools for more than a decade now! best, Peter

2 years, 4 months

[LAU] Update of zita-resampler library

by Fons Adriaensen

Hello all, Zita-resampler 1.11.2 is now available on <http://kokkinizita.linuxaudio.org/linuxaudio/downloads/index.html> This release adds Arm64 NEON code for the Resampler and Vresampler classes, contributed by Nicolas Belin. On an Rpi3b this improves throughput by a factor of around 2.5. Ciao, -- FA

2 years, 4 months

[LAU] My entry for this months KVR contest

by Will Godfrey

https://www.kara-moon.com/forum/index.php?action=dlattach;topic=8888.0;atta… Arram Koth is a fabled ancient city somewhere in deep space. Many have searched. Few have found it, and even fewer return. The concert was a one-off affair. The residents of all known civilizations were invited to send musicians to the city, and free travel was offered for the less advanced. To the disappointment of many, the denizens of a small blue planet failed to respond to any form of contact. Here is the finale where a representative of all the bands came together in an improvisation. Obviously it took a little while for them all to get in the 'zone'! -- Will J Godfrey {apparently now an 'elderly'} 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, 4 months

[LAU] August KVR

by Will Godfrey

Hi Lorenzo, I don't know if you've got anything planned for this month, but I just realised the closing date is tomorrow! -- Will J Godfrey {apparently now an 'elderly'} 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, 4 months

[LAU] Scala .kbm files

by Will Godfrey

Does anyone know where I can get hold of a selection of these key map files. there are hundreds of .scl tuning ones but I cant find any keymap ones :( -- Will J Godfrey {apparently now an 'elderly'} 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, 4 months

[LAU] [music] Spotlight Kyd - Angel of Ice (MODX Mix) [Synthpop/Synthwave]

by Christopher Arndt

Here is some Synthpop / Synthwave made with a Yamaha MODX synthesizer / workstation and Ardour on Linux. [b]YouTube:[/b] https://www.youtube.com/watch?v=HlOjdn0_TYE [b]SoundCloud:[/b] https://soundcloud.com/spotlightkid/angel-of-ice-modx-mix Composed, performed, recorded and produced by Christopher Arndt, 2022. I had a draft for this track for several years until I decided to finally finish it for a small performance I did at my own birthday last summer. Because I didn't want to use an audio backing track, it had to be done just using sounds from a Yamaha MODX (custom presets and some imported SFX samples I made with other hardware synths, e.g. the Waldorf Microwave XTk and Behringer Model-D). After the event, I basically took the arrangement for the internal sequencer of the MODX, which I had created as MIDI in Ardour, polished it a a bit, recorded it to separate tracks and mixed and mastered it in Ardour using various LV2 plugins as well. Then I procrastinated for another year until I finally managed to make a simple visualizer video for it now. The video was made with FOSS tools as well (Blender, Gimp, Shotcut): For the waveform player at the bottom I generated a waveform PNG with audiowaveform [1] with a transparent background and used Gimp and some layering/masking techniques to get the gradient effect. Then I imported the waveform image into Shotcut as a video layer. Lastly I put another layer on top of that, consisting of a semi-transparent black rectangle covering the whole waveform. I then animated the X position of that rectangle with keyframes, so it slides out to right side of the frame. The frequency spectrum animation under the title is a built-in effect of Shotcut. The retro sunset animation was created in Blender. *Share & Enjoy!* Chris [1] https://github.com/bbc/audiowaveform

2 years, 4 months

[LAU] Jack2 handling note-on/note-off

by Bill Purvis

Hi, I'm currently building a digital organ, using GrandOrgue as the main software. I've also constructed the console using Arduinos (Arduini?) to scan tab stops etc., but as these are not recognised as music devices I interpose instances of a program that reads/writes over a ttyUSB? serial port and injects the MIDI events into Jack. After lots of trials, I'm getting close to working, but just noticed an oddity. When I connect up the console and route the incoming messages into jack and then on to a midi monitor I notice that Jack seems to be changing my note-on events slightly. I'd been working on sending note-offs as note-on(0x9?) with velocity=0, which has always worked in the past for me, but Jack modifies these to be genuine note-off messages, with velocity=64. Is there a good reason for doing this? It probably doesn't matter much, though I will now have to check in my Arduino code for the official note-off. Just an extra line of code, but thought it curious behaviour. Bill -- +----------------------------------------+ | Bill Purvis | | email:bill@billp.org | +----------------------------------------+

2 years, 4 months

[LAU] Are there two-axis joystick-style foot pedals?

by david

I'm familiar with the standard foot pedal design - single-axis. Are there foot pedals that would work like two-axis joystick controllers on keyboards? -- David W. Jones gnome(a)hawaii.rr.com authenticity, honesty, community http://dancingtreefrog.com "My password is the last 8 digits of π."

2 years, 5 months

[LAU] pipewire problem - sounds like a bitcrusher (sometimes)

by nik＠parkellipsen.de

Hi, I've recently (not quite sure when it started) had trouble with Pipewire. In my setup, I use all the drop-in replacements for JACK, pulseaudio, alsa, etc. The problem is that sometimes, after a while, everything starts to sound like it has a bitcrusher/downsampling effect applied. A typical path to the problem would be: 1 - start a browser tab that plays audio, pause the audio (everything sounds as expected) 2 - then start a youtube video in another tab while leaving the original tab open 3 - close the second tab 4 - go back to the first one and continue playback (everyhing sounds like there's a downsampling effect applied). I usually have to restart the browser. But it's not only happening with browser applications. Muting and un-muting channels repeatedly in Ardour can create the same problem. I've observed this on two laptops, both running up-to-date Arch Linux with latest Pipewire, usually with the internal sound card. Does anyone have a hint on how to solve this? Best, Niklas

2 years, 5 months

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Linux-audio-user August 2023