Linux-audio-user

linux-audio-user@lists.linuxaudio.org

3 participants
20662 discussions

by jonetsu＠teksavvy.com

Hello, I was told by bitwig support to deactivate 'MIDI in Jack's preferences'. Currently, qjakctl shows 'none' for MIDI driver (option located at bottom right). They 'recommend using jack over ALSA alone'. I would like to give this a try. Is there something else to do to disable jackd MIDI support and have ALSA instead ? Thanks.

9 years, 11 months

Audio seeping into another track

by jonetsu＠teksavvy.com

This might be not/so/easy to prouve although a number of screenshots should. I have a guitar track that has a pre-fader send to another track that adds delay. Then there is an audio drum track that records what has/is played on a MIDI track that is in contact with a Korg Microstation. There are no connections between the drum and guitar and delay tracks, I have double verified in qjackctl. All of those tracks go to the master bus. When the drum is played there is echo added to it from the echo plugin of the other track. Taking out the echo plugin results of having no more echo on the drum track. I will continue to see what is going on. meanwhile, has anyone experience such a behaviour in Ardour (4.4.0) ? (Ardour 440, ah! :) Cheers.

9 years, 11 months

irqbalance

by Brent Busby

On Debian/Ubuntu systems, the irqbalance package which tries to push interrupts across all your CPU's fairly, has been part of the base system for a long time. On Gentoo, it's an available package, but not installed by default. Is irqbalance recommended for RT audio? Deprecated? Doesn't matter?

9 years, 11 months

Ardour4 and named jack?

by Ede Wolf

Hello. After a fresh install I just thought I'd give the new ardour a try and after some problems starting up I figured, that ardour cannot detect a running jack if that has been started with the "--name SOMENAME" option and is not running as default. Not a big deal at all having an unnamed jack, but I am wondering if there is an option to pass to ardour to inform it about jack running not as "default"? Thanks Ede

9 years, 11 months

ladspa.org

by Hermann Meyer

Hi LV2 is the successor for LADSPA, that's clear so far. but it make me wonder that www.ladspa.org disappears, as LADSPA is still widely used. Is there somewhere a new home or have we to go to the archive.org

9 years, 12 months

Linux softsynths

by James Harkins

The reason why I was looking for DST capability: I have to give a lecture at my school next week about synthesis techniques, and I wanted to show some tricks that are not exactly standard (even though they've been around since Stockhausen was cutting up little bits of tape, but never mind that). Such as: run a fixed-frequency band-limited impulse through a high-Q bandpass filter to play melodies on the impulse's harmonic series.[1] I can do this easily in SuperCollider, but I don't want the students to come away with the impression that you have to learn programming to do synthesis. So that's out. I can do this easily in Abysnth under Windows, but could not get it to work well in Linux. I looked at a couple of native Linux softsynths and... I have to say... I was sorely disappointed. It wasn't evident to me how to generate a bandlimited impulse in ZynAddSubFx; the documentation seems to indicate that this synth is built on totally different principles. Wavetable synths like WhySynth are hampered by the inability to import custom wavetables and by impossible-to-control mapping of MIDI note numbers onto filter frequency. I had a quick look at the webpages for Ingen, but there are no packages and I was burned out on build failures at that point, so I didn't go further. For the moment, I need to plug ahead with Windows so it's a question mainly for my own curiosity, but... did I overlook a really good softsynth package, or have I stumbled onto a gaping hole in the Linux audio ecosystem? hjh [1] Underworld, "Rez."

9 years, 12 months

"Cannot open lsp client" ??

by James Harkins

Can anyone provide some insight into the following JACK error? Cannot open lsp client jack_client_open() failed, status = 0x21 Background: SuperCollider has an extension class, SCJConnection[1], that uses jack_lsp to query a running jack server for ports, properties and connections. This has never failed for me. In fact, at 8 AM today, it was fine. Then I needed to step away, so I closed audio apps, stopped the Jack server (using qjackctl) and suspended my Ubuntu session. A bit later, I resumed the session, restarted the Jack server, launched SC, and it spit out "Cannot open lsp client" for the same action that had worked perfectly two hours before. Quitting and restarting the Jack server did not resolve the problem. Rebooting the computer resolved the problem. If it's impossible to determine the cause at this point, that's fine -- I've seen stranger things from computers. But it's troubling that something that has worked literally thousands of times would suddenly, today, fail for no apparent reason. So I'm hoping maybe somebody might have a guess what would cause lsp to break (and I can keep that in mind if it happens again). hjh [1] https://github.com/supercollider-quarks/LinuxExternal/blob/master/JACK/SCJC…

9 years, 12 months

KXstudio Repo Packages

by David Baron

For example, flac and jackd2 from kxstudio "trusty" are ostensibly much newer than on Debian Sid (unstable). Are these experimental? Safe to upgrade?

9 years, 12 months

Extensive Music Production Tutorials

by jonetsu＠teksavvy.com

Hello, Just came across a series of music production videos on youtube that seems to be quite solid. Audio theory is covered at length. There are 7 parts divided in sections. The first part about theory is about 7 hours. The author is Brian Bollman. He uses Bitwig although as he says, much of the foundation can be done on any DAW. The first part, 7 hours, covers: Free Education Resources Audio Fatigue and Relative Loudness Digital Audio, Metering and Distortion Analog Audio, Metering and Distortion Sampling Rates, Bit Depth Sonic Visualizer (http://www.sonicvisualiser.org) Audio Plugins Fundamentals of Sounds - Amplitude, Frequency, Pitch, Nyquist Phase Beating, Haas Effect Timbre, Harmonics Music Production on a Budget Comparing DAWs I will try to follow most of the course. Scroll down a certain number of times to see the first lessons: https://www.youtube.com/channel/UCRBkLO9F7mbtoLT583xLJ0w Cheers.

9 years, 12 months

ANN: Contemplative Practices for the 21st Century University -- call for submissions

by Ivica Ico Bukvic

Apologies for x-posting--please consider sharing this announcement with your colleagues/constituents. I am pleased to announce the call for works (papers, posters, installations, and performance works) for the upcoming Contemplative Practices for the 21st Century University conference that will take place at Virginia Tech, March 10-12, 2016. As part of the conference, Virginia Tech Institute for Creativity, Arts, and Technology (ICAT) invites proposals for art, installations, and technology demonstrations with focus on contemplative practice. While proposed art and installations should also leverage technology, within the context of this submission we define technology in the broadest terms possible. All submissions will be reviewed by an interdisciplinary panel consisting of ICAT faculty and will be assessed on their feasibility within the context of available conference infrastructure and resources. Selected projects will be showcased as part of the reception and a concert at the Moss Arts Center. Where appropriate, some submissions may be also presented in a paper and/or poster format as part of the "Technology" track. Authors of selected submissions will be expected to attend the conference. We are particularly interested in performance works that leverage ICAT's unique infrastructure, including Cube and Perform Studio. To apply, please see the ICAT Submissions Form on the website below. The deadline for submissions is December 18, 2015. http://www.cpe.vt.edu/cptcu/submissions.html Best, -- Ivica Ico Bukvic, D.M.A. Associate Professor Computer Music ICAT Senior Fellow DISIS, L2Ork Virginia Tech School of Performing Arts – 0141 Blacksburg, VA 24061 (540) 231-6139 ico(a)vt.edu www.performingarts.vt.edu disis.music.vt.edu l2ork.music.vt.edu

9 years, 12 months

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Linux-audio-user