Linux-audio-user September 2009

linux-audio-user@lists.linuxaudio.org

143 participants
148 discussions

by Ray Rashif

I was overjoyed after my last attempt at running the latest intel driver and setting up KMS for it, only to later find out that this had a high price. The xruns are horribly too many, and events that trigger them are window minimise/restore/maximise, disabling/enabling compositing, even changing tabs in a window! Now I'm starting KMS before even my initscripts run, very early in userspace, and I've tried running it later as well - to no avail. I'm back to a regular environment without this KMS thing, partly content (that I'm safe again) and partly disappointed (I thought I almost had the perfect system). Now I would really like to know from someone in-the-know why and how KMS are underruns are related. I'm sure this is not intel-specific.

16 years, 5 months

[LAU] MAX/MSP looper... can it be ported to PD?

by Ken Restivo

Here's a looper in MAX/MSP that's getting a lot of notice lately. http://www.macmusic.org/software/view.php/lang/en/id/4715/lloop Dunno if it could be ported to PD though. If so, then it could be another Linux-based looper. -ken

16 years, 5 months

[LAU] MIDI over ethernet

by Brett McCoy

Is there a MIDI over ethernet implementation for Linux? I searched and couldn't find one except some suggestions to use stuff under WINE. -- Brett ------------------------------------------------------------ "In the rhythm of music a secret is hidden; If I were to divulge it, it would overturn the world." -- Jelaleddin Rumi

16 years, 5 months

Re: [LAU] Ext3 or JFS (or other) for linux audio?

by cunnilinux himself

> Ext3 or JFS quite a strange question, imnsho :) i'd rather ask about ext4 vs xfs i would not recommend ext3 — too slow xfs is fast & reliable, but at least it does not have any tools to deal with bad blocks if they appear. so the answer is ext4. -- sex, bike, open source!

16 years, 5 months

[LAU] FluidSynth fails to sintetize more 85% events generated by Drum machine ALESIS D4.

by Jedi Storm

I'm running fluidsynth/qsynth in a 64studio distribution. I'm generating MIDI events from a Drum Machine Alesis D4 directly to fluidsynth through a MIDI In port and fluidsynth fails to sintetize more than 85% of the hits on the PAD. Facts : 1- Fluidsynth is receiving MIDI events from every single hit on the PADs. (checked with amidi & fluidsynth -v) 2- Fluidsynth is able to reproduce every single Midi event if it's generated by a Midi keyboard or Virtual Keyboard. 3.- If I connect the Alesis D4 module to a Hydrogen dumr machine , it reproduce and sintetize every single stroke without problem. 4.- After do some debugging I have been able to see the following : MIDI KEYBOARD EVENTS : (This works pretty well) fluidsynth: noteon 0 65 66 00754 1397.075 1397.105 0.000 0 fluidsynth: noteon 0 65 66 00754 1397.079 1397.105 0.000 1 fluidsynth: noteon 0 65 66 00755 1397.081 1397.105 0.000 2 fluidsynth: noteon 0 65 66 00755 1397.081 1397.105 0.000 3 fluidsynth: warning: ALSA sequencer buffer overrun, lost events fluidsynth: noteoff 0 65 0 00755 1397.232 1397.262 0.151 3 fluidsynth: noteoff 0 65 0 00755 1397.235 1397.262 0.154 3 MIDI DRUM SET ALESIS D4 EVENTS : (Fails to synthetise 75% of the hits) fluidsynth: noteon 0 65 127 00776 1480.951 1480.981 0.000 0 fluidsynth: noteon 0 65 127 00776 1480.951 1480.981 0.000 1 fluidsynth: noteon 0 65 127 00777 1480.951 1480.981 0.000 2 fluidsynth: noteon 0 65 127 00777 1480.951 1480.981 0.000 3 fluidsynth: warning: ALSA sequencer buffer overrun, lost events fluidsynth: noteoff 0 65 0 00777 1480.951 1480.982 0.000 4 fluidsynth: noteoff 0 65 0 00777 1480.951 1480.982 0.000 4 fluidsynth: warning: ALSA sequencer buffer overrun, lost events MANUAL GENERATED EVENTS : (100% Accuracy response time) > noteon 0 65 127 fluidsynth: noteon 0 65 127 00779 1562.500 1562.526 0.000 2 fluidsynth: noteon 0 65 127 00779 1562.500 1562.526 0.000 3 > noteon 0 65 127 fluidsynth: noteon 0 65 127 00780 1563.597 1563.626 0.000 2 fluidsynth: noteon 0 65 127 00780 1563.597 1563.626 0.000 3 > noteon 0 65 127 fluidsynth: noteon 0 65 127 00781 1564.735 1564.767 0.000 2 fluidsynth: noteon 0 65 127 00781 1564.735 1564.767 0.000 3 Please , we having a Gig in 2 weeks and I need to solve this ! THANKS ALL WE LOVE YOU ! Jedi Storm.-

16 years, 5 months

[LAU] double-sharp symbol in latex

by Atte Andre Jensen

Hi I'm currently working on a theory book in latex with the music set in abc. I use the following commands for displaying accidentals in latex. However the symbol I use for double-sharp (\times) is not exactly a double-sharp. Anyone knows if there's a way to get a real double-sharp symbol available in latex? \newcommand{\es}{$^\flat$} \newcommand{\eses}{$^{\flat\flat}$} \newcommand{\opl}{$^{\natural{}}$} \newcommand{\is}{$^\sharp$} \newcommand{\isis}{$^\times$} -- Atte http://atte.dk http://modlys.dk http://virb.com/atte

16 years, 5 months

Re: [LAU] FluidSynth fails to sintetize more 85% events generated by Drum machine ALESIS D4.

by Ken Ellinwood

Mr Jedi Storm, I'm cc'ing the audio-user list again since others may be able to help. I use midi files instead of an actual hardware device like you do. I run a (home-made) utility which strips out the note-off events from the percussion track and saves the updated midi file. I then play back the resulting file with fluidsynth and the problem goes away. In your case you will need to configure a program to filter the events out before they get to fluidsynth. I've never done this kind of filtering so I don't know which software to recommend, but assuming such a real-time midi filter exists, it should be possible to create a chain by connecting the alsa ports of the various applications together correctly and make this all work. Ken --- On Thu, 9/10/09, Jedi Storm <jedi00(a)gmail.com> wrote: From: Jedi Storm <jedi00(a)gmail.com> Subject: Re: [LAU] FluidSynth fails to sintetize more 85% events generated by Drum machine ALESIS D4. To: "Ken Ellinwood" <kellinwood(a)yahoo.com> Date: Thursday, September 10, 2009, 6:07 PM KEn , Excuseme but what do you mean with ; strip out the note-off events in the percussion tracks altogether ? I've the posibility to change default Instrument bank position as well with an editor ... Thank you very very much ! 2009/9/11 Ken Ellinwood <kellinwood(a)yahoo.com> It doesn't matter if they are note-off or note-on with a velocity=0, fluidsynth treats both as note-off events. You are experiencing a bug which occurs when a note-on is followed shortly by a note-off or note-on-velocity-zero event. If the temporal spacing between the two events is short enough that fluidsynth processes both events during the same cycle, then audio for the note-on is never generated. This occurs most frequently with percussion tracks since the note-on and note-offs are spaced very closely together. The only solution I've found is to strip out the note-off events in the percussion tracks altogether. Its a pain, but works pretty well. Ken --- On Thu, 9/10/09, James Cameron <quozl(a)us.netrek.org> wrote: From: James Cameron <quozl(a)us.netrek.org> Subject: Re: [LAU] FluidSynth fails to sintetize more 85% events generated by Drum machine ALESIS D4. To: linux-audio-user(a)lists.linuxaudio.org Date: Thursday, September 10, 2009, 4:10 PM On Thu, Sep 10, 2009 at 07:36:06PM +0200, Jedi Storm wrote: > MIDI Keyboard or Virtual Keyboard generate NOTE ON and NOTE OFF events , The > alesis D4 only generates NOTE ON midi events. This will be the cause of the symptom. Change the D4 configuration to generate NOTE OFF events? I've checked, and fluidsynth has no documented option for inventing the NOTE OFF events, so you have to generate them. I've briefly googled, and there are mentions of changing the D4 to generate NOTE OFF events. I'm not familiar with the D4 myself though. -- James Cameron http://quozl.linux.org.au/ _______________________________________________ Linux-audio-user mailing list Linux-audio-user(a)lists.linuxaudio.org http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user _______________________________________________ Linux-audio-user mailing list Linux-audio-user(a)lists.linuxaudio.org http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user

16 years, 5 months

[LAU] OT: unbalanced to balanced

by Josh Lawrence

This is so way-OT, but I trust the knowledge on this list in general, so I'm hoping someone can help me... I've extracted a little mono amp out of a pair of computer speakers that I would like to use as a general practice/noise amp. It currently has a balanced 1/8" input. The wires going to the input are: black, white, and a braid of wires (I'm assuming shield?). I'd like to cut this 1/8" plug off and add a 1/4" female jack so I can plug stuff into it. But where do I solder the wires to? (i.e., black to tip, white to sleeve, that kind of thing) I have access to stereo and mono 1/4" jacks. Thanks, and sorry again for the OT. PS - I've read that the proper way to do this is to use an audio transformer, but that's WAY overkill for this project, I just want sound to come out, nothing audiophile or anything like that. -- Josh Lawrence http://www.hardbop200.com

16 years, 5 months

[LAU] Jack2 and OSS on Linux?

by Robert Persson

Hello, Could anyone tell me whether there are plans to extend the OSS support in Jack2 from Solaris to Linux? I've just switched to OSS4 because ALSA doesn't support my laptop's on-board sound properly. However I now no longer have Jack. If it won't be possible in the near future to use OSS with Jack, might it be possible to continue using OSS on the internal audio device and ALSA on my USB audio interface? I'm guessing that it isn't, but you don't know till you ask. Many thanks in advance, Robert

16 years, 5 months

[LAU] FluidSynth fails to sintetize more 85% events generated by Drum machine ALESIS D4.

by Jedi Storm

16 years, 5 months

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Linux-audio-user September 2009