Linux-audio-user February 2004

linux-audio-user@lists.linuxaudio.org

147 participants
192 discussions

[linux-audio-user] A machine for live gigging?

by Richard K. Ingalls

I'm still very new to Linux Audio Workstations (I've been a Cakewalk/Sonar/SoundForge user for years), so please forgive me if the question seems very basic... I'd like to build a computer to take with me for live gigs that can replace sound module racks (do softsynth/sample playback, multi-timbral, polyphony, etc.). In other words can it replace an Alesis QSR, a Kurzweil K2000RS and a Korg TR? Can I do this and still have great sounds/synth/samples? So the question is can a Linux DAW do this? If yes, what are the specs for such a machine? CPU? RAM? Motherboard? Sound card (very important, eh)? Thanks to all who post! -- =========================================================== Richard K. Ingalls Director of Information Technology Glenwood R-8 School District West Plains, MO email..ringalls(a)glenwood.k12.mo.us web....glenwood.k12.mo.us ph.....417.256.4849 fax....417.257.2567 "Glenwood R-8: home of the mustangs!" ===========================================================

20 years, 9 months

[linux-audio-user] amd vs p4

by Tim Blechmann

hi all, i'm curious about your thoughts about the recent generation of amd's 64bit chip and the p4 ... it seems, that the amd chip isn't as fast as the p4 if you compare the floating point performance (what's essential for dsp), but on the other hand it doesn't suffer from the denormal bug (and several pd / ladspa object still suffer from denormal problems) ... i'd be really interested in your thoughts ... Tim mailto:TimBlechmann@gmx.de ICQ: 96771783 -- The only people for me are the mad ones, the ones who are mad to live, mad to talk, mad to be saved, desirous of everything at the same time, the ones who never yawn or say a commonplace thing, but burn, burn, burn, like fabulous yellow roman candles exploding like spiders across the stars and in the middle you see the blue centerlight pop and everybody goes "Awww!" Jack Kerouac

20 years, 9 months

RE: [linux-audio-user] ANN: Specimen Version 0.2.0 Released

by Matthew Allen

For quick tweaking and just noodling around, SEQ_24 + Specimen + Ecamegapedal has really been my friend in the last couple of weeks. m. > -----Original Message----- > From: linux-audio-user-bounces(a)music.columbia.edu [mailto:linux-audio- > user-bounces(a)music.columbia.edu] On Behalf Of Florin Andrei > Subject: Re: [linux-audio-user] ANN: Specimen Version 0.2.0 Released > That is awesome! Proof that simplicity is beauty. A minimalistic > sampler, exactly the minimum required to test sounds, do a solo, etc. > > I also like this sequencer, seems to be the perfect companion for > Specimen: > > http://www.filter24.org/seq24/ _________________________________________________ Scanned on 18 Feb 2004 18:06:29 Scanning by http://erado.com

20 years, 9 months

[linux-audio-user] Re: machines for live gigging

by Brian Redfern

I use a lowly dell 2500 with the midiman quattro usb. I only do stereo output, but now that I have jack working via the ccrma capabilities kernel I may be able to process live input at the same time as well. The quattro isn't for doing heavy multi-tracking, the hdsp with the pc card is a better (but more expensive) choice for doing that. With the capabilities (not the low latency) ccrma kernel the quattro works great with both input and output, and jack works well, though it may perform better when I can upgrade to the maximum 500 megs of ram for my old machine. You don't need the absolute optimal, or most expensive new system, you can get by on a used laptop, or build a pc from scratch, I built my desktop system for $80 from surplus parts, but its still got a 1.1 gigahtz athalon, so you can build a decent (but not the latest) machine for almost pennies compared to what it used to cost to get a machine. You can get barbones shuttle systems for cheap, with the handle for carrying the small box to a gig, that with a flatscreen monitor is cheaper and more robust than a laptop.

20 years, 9 months

[linux-audio-user] Hammerfall help

by linux-audio-user＠k--b.org

Hello. I have a new Hammerfall 9652 card that I am trying to set up with DeMuDi 1.1.0. Before, lspci listed the card as: "Multimedia audio controller: Xilinx Corporation: Unkown device 2fc4 (rev 03)" but then I moved it to a different PCI slot and now lspci says: "Multimedia audio controller: Xilinx Corporation RME Digi9652 (Hammerfall)" I think that's a good sign. However, /etc/init.d/alsa start gives: "Starting ALSA (version 0.9.8):PCI: Found IRQ 9 for device 02:0b.0 PCI: SHaring IRQ 9 with 00:1f.4 RME Digi9652/Digi9636: no cards found rme9652-failed" Now that the card registers in lspci, I have hope that the card is working... but I don't know what to try next. Can anyone please help? Thank you in advance. Kris Bergstrom -- H5n9d0+5

20 years, 9 months

[linux-audio-user] LADSPA SC2, SC3 Compressors and Sidechain

by Russell Hanaghan

I could not get any noticeable function trying the sidechain inputs of these (I forget if it was specifically SC2 or 3 or 4 but could see the inputs in Jack-Rack) I ran jack from Qjackctl, Ardour and jack-rack. Inserted SC3 into jack-rack. All routing was done from Qjackctl "Connect" interface. Tried every way to Sunday and could not get any effect except "makeup gain". Then I tried just patching SC2 then SC3, etc as inserts direct into an audio channel in Ardour for straight compression. Could not get them to do any standard compressing either. Any thoughts or illumination on these compressors would be great. I particularly want to run a "de essing" of sorts on a single mike imput. Is it possible with these plugs?? Thanks

20 years, 9 months

[linux-audio-user] noise problem with ImproSculpt: solved !

by Dave Phillips

Greetings: I finally resolved the mouse noise problem with ImproSculpt. Here's what I did: 1. Made the csound binary suid root. 2. Erased the CsOptions for Linux in the ImproSculpt.csd file (they're ignored when csound is suid root). 3. Ran the app so: csound --sched -d -i devaudio -o devaudio -b 512 -B 4096 -m6 ImproSculpt.csd Screen redraws are slower, but the mouse noise is gone. I'm still confused as to why all this trouble just "suddenly" occurred, but I'm glad to have discovered a solution. I also learned a lot about PCI latency timing, graphics card priority, hard/software buffering, and lots of other stuff that chewed up a bunch of my time. Many thanks to all who responded to my dilemma, I appreciate all the assistance and advice. Best regards, dp Gabriel Maldonado wrote: > Hi Dave, > It could depend on the massive CPU resources required by improsculpt, > so any movement on the GUI can subtract processor time, causing > drop-outs. Have you tried to increase the buffer size? However, try to > ask Oeyvind if this could be a possible cause. Notice that in > CsoundAV, there is still the original FLTK code, not that modified by > Istvan. I still have to study Istvan code, to see if there are > substantial differences, besides merging all code in a unique cpp file. > > Gabriel > > > Dave Phillips wrote: > >> Greetings: >> >> I've been testing various CSD files to see and hear how the FLTK >> opcodes are supported in the most recent canonical CVS sources. Many >> files work fine (e.g., J. M. Comajuncosas' 303 emulator, his Synth >> Toot, and his Direct Hammond2), but I'm having a problem with Oeyvind >> Brandtsegg's ImproSculpt. When I move the mouse in this program I >> hear a nasty ripping noise tracking the mouse movement. Noise occurs >> when I change window focus or move a window. Note that this noise >> does not occur with other FLTK-based apps, so I'm wondering what >> there might be in ImproSculpt to cause this trouble. Steven Yi >> suggested that the FLTK updating may itself be a problem, but the >> other apps tested work fine. So I'm at an impasse and can use some >> suggestions for troubleshooting. Sorry to bother the developer's list >> but it seemed the better forum to ask in. Could Steven be right about >> the FLTK opcodes themselves causing the problem ? Would there be any >> advantage compiling Csound against a static libfltk ? >> >> Best, >> >> Dave Phillips >> >> > >

20 years, 9 months

[linux-audio-user] Which kernel for low latency?

by Glenn McCord

I've been using a 2.4.2 kernel with Andrew Morton's patches and I got jack to work very well. However, seeing 2.6 is the latest and greatest I'd like to switch but am having no luck thus far. Q. If anyone has got jack to work great with a 2.6(.1) kernel could you share with me what version of the 2.6 kernel you used and what patches (if any) At the moment I'm trying a 2.6.1 with an mm4 patch but I'm getting no sound with my soundblaster live. I've done: <*> Sound card support and, under Advanced Linux Sound Architecture ---> <*> Advanced Linux Sound Architecture <*> Sequencer support <*> OSS API emulation <*> OSS Mixer API <*> OSS PCM (digital audio) API <*> OSS Sequencer API rebooted and install alsa-lib-1.0.1 and alsa-utils-1.0.1 as well but I get these errors root@upstairs glenn # aplay /usr/kde/3.2/share/sounds/pop.wav ALSA lib pcm_hw.c:1055:(snd_pcm_hw_open) open /dev/snd/pcmC0D0p failed: No such file or directory aplay: main:502: audio open error: No such file or directory and glenn@upstairs glenn $ alsamixer No mixer elems found I'm at a loss but am interested at what type of kernel others are using. I think my next best bet is to remove alsa from the kernel and install it seperately. Thanks

20 years, 9 months

[linux-audio-user] multiple MIDI interfaces

by Florin Andrei

Soon i'll have to connect 3 MIDI devices to a Linux system (and also send MIDI between the devices themselves, not only device<-->computer): two hardware synths (keyboards) and an effects box. Possibly another device later, but we'll see. What MIDI box do you recommend in this case? I'm looking at M-Audio USB MIDISPORT 4x4 which seems to be quite ok: http://www.m-audio.com/index.php?do=products.main&ID=a4fc99df673e54ff97ce39… Anyone using it? Can you route the MIDI signal in arbitrary ways? Can you route one input to all outputs, or do other similar things? What's the software that you use to control it? Does it work with your sequencer? How well does it work with ALSA? If you have a sound card (or maybe two soundcards) on your system, can you use its MIDI interfaces in addition to the 4x4? Can you do arbitrary MIDI routing in that case? On the ALSA website, next to the 4x4 it says "Firmware driver coming soon" - what does that mean? Is it not supported yet? If 4x4 doesn't work under Linux, can you recommend a product similar in features and price? -- Florin Andrei http://florin.myip.org/

20 years, 9 months

[linux-audio-user] MLP DVD playing back on Linux

by Andrew Gaydenko

Hi, Do I understand well, MLP-compressed DVD can not be played back free on Linux, because of MLP algorithm is patented? Andrew

20 years, 9 months

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Linux-audio-user February 2004