Linux-audio-user

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20661 discussions

[linux-audio-user] Re: Can't have second port on Midisport 2x2 USB

by Mirouf Linux

> Mirouf Linux wrote: > > I've got a Midisport 2x2 USB, which run with > > EZbusmidi. > > I've got few configuration problems: > > > > - With AlSA, i have to plug the interface after > RedHat > > had been launch, otherwise ALSA intervert the > number > > of my cards: > > The USB host driver get initialized, and loads all > USB device drivers, > before ALSA is initialized. > > Put the line: > > snd-usb-audio > > into the /etc/hotplug/blacklist file to prevent > this. > This is the right thing to do, no more problem with the usb and alsa, even if i let the midisport connected to my pc, but I had to add in my /etc/modules.conf: options snd-usb-audio enable=1 index=1 alias snd-card-1 snd-usb-audio And, it must be after the the audio card configuration. > > - With ardour, I set up my ardour.rc file like > that: > > Midi-port tag "Midisport" device=/dev/snd/midiC1d0 > ... > > > > It works, i've got MTC on port A, but i can't find > the > > device for port B. I tried midiC1D1, MidiC2D0 : it > > doesn't work. > > Both ports are available under this file, but this > is an internal file > that should be accessed by the ALSA library only. > > You should configure your program to use ALSA MIDI > ports named > "hw:1,0,0" and "hw:1,0,1". If your program doesn't > support this, load > the snd-virmidi driver, connect its ports to the > 2x2's ports (with > aconnect or kaconnect), and use the virtual ports in > Ardour. (If > loaded as card #2, the files for these will be > /dev/midi02 and > /dev/amidi02.) > > HTH > Clemens I tried to get work virmidi, because ardour isn't using ALSA MIDI (it dont understand hw.... as a device, for midi). I added 2 virtuals midi ports in my /etc/modules.conf, reboot : there was no problem with the initialisation, but it doesn't work : no virtual midi port. I will retry, i think i made a mistake, if it doesn't work i will ask you again.... Thanks a lot Clemens, you save my MIDI! François Yahoo! Mail : votre e-mail personnel et gratuit qui vous suit partout ! Créez votre Yahoo! Mail sur http://fr.benefits.yahoo.com/ Dialoguez en direct avec vos amis grâce à Yahoo! Messenger !Téléchargez Yahoo! Messenger sur http://fr.messenger.yahoo.com

21 years, 7 months

Re: [linux-audio-user] measuring sound volume

by davidrclark＠earthlink.net

Patrick, > Do you mean the layout of the systems? Sorry but no, I meant the pattern of the individual speakers or a cluster of them --- however they are packaged. The inverse square law that Steve Harris mentioned would result in a spherical pattern from a point source. If you took a slice of that, it would be a circle. The sound pattern of most real speakers don't look like that. They have quite "distorted" shapes. If you laid these out according to the layout of the system, you could get some idea of the sound pattern, but it would be neglecting boundaries, wave interference, etc. It looks to me, from another post, that Mark Knecht may have some more words of wisdom here. Certain types of speakers should be similar enough that rules of thumb and prior experience may be very helpful.

21 years, 7 months

[linux-audio-user] command line utility to change bit depth

by derek holzer

Does anyone know a good command-line app to change bit depth of WAV files? I'd like to batch process a bunch of files. Ecasound does not have this feature to my knowledge. d. -- derek holzer ::: http://www.umatic.nl ---Oblique Strategy # 54: "Do something sudden, destructive and unpredictable"

21 years, 7 months

Re: [linux-audio-user] measuring sound volume

by davidrclark＠earthlink.net

Regarding the inverse square law: Be careful! This law applies to idealized situations such as point sources in isotropic, homogeneous media. For a speaker in a tunnel, for example, it does not hold true. Speakers have radiation patterns as do electromagnetic devices such as antennae. Boundaries are also important. You will also have interference effects, etc. I would anticipate that the inverse square law to be quite inaccurate, but being outside will help. I love theory myself, but this situation calls for the voice of experience. (Now if that voice says, "Always use the inverse square law," please let me know.) The best thing I can think of from a theoretical perspective (sort of) is to obtain the speaker patterns if you can.

21 years, 7 months

[linux-audio-user] test

by juto aviten

I sent an email on the list but it never comin???? so here just a test to see if I'm always in... I received a message who said that my message could be a spam and that it will be check by the moderator but nothing happen then??? best juto

21 years, 7 months

[linux-audio-user] Can't have second port on Midisport 2x2 USB

by Mirouf Linux

Hi, I've got a Midisport 2x2 USB, which run with EZbusmidi. I've got few configuration problems: - With AlSA, i have to plug the interface after RedHat had been launch, otherwise ALSA intervert the number of my cards: cat /proc/asound/cards 0 [PAD ]: Digi96 - RME Digi96/8 PAD RME Digi96/8 PAD at 0xe7000000, irq 19 1 [M2x2 ]: USB-Audio - Midisport 2x2 Midiman Midisport 2x2 at usb-00:02.1-3 The RME became [1] and Midisport [0], so it works, but not with all the applications, and i've got to set up the whole sound system eatch time i remove the midisport, not very cool... Do someone got any ideas ? - With ardour, I set up my ardour.rc file like that: Midi-port tag "Midisport" device=/dev/snd/midiC1d0 ... It works, i've got MTC on port A, but i can't find the device for port B. I tried midiC1D1, MidiC2D0 : it doesn't work. Can someone help me , and show me the way to find what device i've to use? Thanks françois Gueurce Yahoo! Mail : votre e-mail personnel et gratuit qui vous suit partout ! Créez votre Yahoo! Mail sur http://fr.benefits.yahoo.com/ Dialoguez en direct avec vos amis grâce à Yahoo! Messenger !Téléchargez Yahoo! Messenger sur http://fr.messenger.yahoo.com

21 years, 7 months

[linux-audio-user] Re: linux-audio-user Digest, Vol 6, Issue 36

by Bill Schottstaedt

> BTW, one of the beautifullest examples of extreme stretching isn't > Jane Fonda, but the "Beetstretch" project of Leif Inge: It was done with Snd/CLM.

21 years, 7 months

[linux-audio-user] patches for Quattro etc. problems

by Frank Barknecht

Hi, here's an update to the notorious problem with some M-Audio USB devices on kernel 2.6. I won't be able to test this in the next time, but maybe some other owners of Quattro, Duo or Audiophile USBwant to give it a try. If yes, please report to Alan Stern or linux-usb-devel. ciao, -- Frank ----- Forwarded message from Alan Stern <stern(a)rowland.harvard.edu> ----- Date: Tue, 16 Mar 2004 10:12:45 -0500 (EST) From: Alan Stern <stern(a)rowland.harvard.edu> Cc: USB development list <linux-usb-devel(a)lists.sourceforge.net> Subject: Re: invalid alternate setting Here's an announcement for people interested in using USB devices with invalid configuration descriptors. I've completed a series of patches that will make the system accept such devices, to the extent that it can. You will have to apply all three patches in sequence; each is a prerequisite for the next. They should go on top of a 2.6.4 system. The patches are: as221: http://marc.theaimsgroup.com/?l=linux-usb-devel&m=107937025411336&w=2 as222: http://marc.theaimsgroup.com/?l=linux-usb-devel&m=107937021027794&w=2 as223: http://marc.theaimsgroup.com/?l=linux-usb-devel&m=107937029404286&w=2 The first two patches just improve the error logging; you might like to see what happens when you plug in your devices. The third is the one that changes the kernel's behavior. Please let me know if the patches don't work as expected. Not all the USB drivers will work properly with that third patch installed, so be warned. The USB audio class driver should be okay. I have no idea what will happen with the ALSA USB audio/MIDI driver; it hasn't been updated yet. Alan Stern ----- End forwarded message ----- -- Frank Barknecht _ ______footils.org__

21 years, 7 months

Re: [linux-audio-user] RE: Live audio sampler

by Sampo Savolainen

If specimen is too complicated, I would suggest using a modular synth like galan. Here's a quick howto for galan: Per sample you have to create: 1/2x Sampled voice (mono/stereo), attach the samples to these 1/2x Randomaccess to realtime converter (mono/stereo) 1 x Control To get anything out: 1 x oss/alsa/jack output * Attach the sampled voice(s) to the randomaccess converter(s) * Attach the control to the converter(s) (bottom round thingy to the converters upmost round thingy) * Attach the converter(s) output (right side thingy) to the sound output * Create a button for the control (via the context menu new control->button) Then open the control panel (window->Show control panel) Press the button in the control panel, and the sample will play. You can add as many samples as you wish, just use different sources, converters and controls for each sample. (I used an old version of galan to do this, so there might be stereo "sampled voice" plugins in the newer ones) Sampo daniel.vincent(a)blueyonder.co.uk: > Me: > > Just wondering if anyone has any recommendations for a piece of > software > > that I can play samples from, as simple interface-wise as possible. > > Sampo: > > How about specimen? > > http://www.gazuga.net/ > > Thanks Sampo > > Even Specimen is a bit overly complicated, I literally want to be able to > trigger samples whilst playing keyboards etc if that makes sense. I've > created somthing similar in VB for Windows, which is basically a grid of > buttons, each one linked to a sound file, configurable by an ini file I > keep with the executable. Obviously I'd like to do something similar > under Linux. > > www.southlondonlive.org > www.onionjack.com > >

21 years, 7 months

[linux-audio-user] Linux audio presentation, 17.3. at Otaniemi, Finland

by Kai Vehmanen

Hello all, this comes a bit late, but in case you happen to be somewhere in South Finland tomorrow... I'll be giving a short presentation on Linux audio tomorrow at Otaniemi (hut.fi) at 14.00 [1]. I'll talk a little about general issues of developing apps for GPOSes, introduce ALSA, JACK and LADSPA, and finally show a quick demo of well-known Linux audio apps (full PlanetCCRMA setup). The presentation is part of the "Digital Signal Processors and Audio Signal Processing" course [2] at HUT, but everyone is welcome to come and listen (and ask tricky questions ;)). The presentation is in Finnish, but I can translate on-the-fly if needed. :) [1] Auditorium S1, Otakaari 5 http://www.hut.fi/Current/getting_to_otaniemi.html http://www.hut.fi/Current/otaniemi_map.html [2] http://www.acoustics.hut.fi/teaching/S-89.510/ -- http://www.eca.cx Audio software for Linux!

21 years, 7 months

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Linux-audio-user