Linux-audio-user May 2006

linux-audio-user@lists.linuxaudio.org

184 participants
187 discussions

by Dan Easley

Slashdot recently mentioned the following FFT via GPU library: http://gamma.cs.unc.edu/GPUFFTW/index.html (slashdot article) http://hardware.slashdot.org/hardware/06/05/29/1424213.shtml it has a custom license, which seems friendly enough, but i'd prefer GPL. -- daneasley(a)gmail.com dan(a)towndowner.com dan(a)burntpossum.com http://towndowner.com http://burntpossum.com

18 years, 10 months

Re: [linux-audio-user] firmware loader help please

by Hamish Low

Hi Lee, I've trying the commands in the vxloader directory in the firmware directory in the root directory as root and as user in several places everything i've read talks about a vxloader utility but on my setup vxloader is just a folder with driver files inside peace Hamish Send instant messages to your online friends http://au.messenger.yahoo.com

18 years, 10 months

[linux-audio-user] Removing AC hum after the fact.

by Alex Polite

Hi there. I have an interview with a lot of AC hum. I'd like to remove as much of the hum as possible. This is not for broadcasting. I just want to be able to hear what the persons on the recording are saying. I've looked at the sound in a frequency spectrum analyzer[1]. The hum looks just as consistent as it sounds so I guess there must be a way to filter it out. I just don't know which linux tool will do it for me. alex [1] http://www.baudline.com -- Alex Polite http://flosspick.org - finding the right open source

18 years, 10 months

[linux-audio-user] Re-compiling Demudi kernel help please: Digigram VXpocket2

by Hamish Low

Firstly thanks to Asbjørn, Lee, Tim and others who have given me advice so far. I tried using Asbjørn's vanilla kernel but it didn't work as our laptops are different, but your config settings were a good guide. I downloaded the source package for 2.6.16 I did make oldconfig, to use the config already working on my machine (just without the VXpocket support), I tried compiling the kernel as per the instructions on the Demudi page <http://demudi.agnula.org/wiki/Low-latencyKernelBuildingHowto>, and by referencing Asbjørn's config settings Lee had written that CONFIG_ISAPNP must be enabled, but this wasn't an option that I could choose in menuconfig, there was just a hyphen beside this option, also this wasn't enabled in Asbjørn's settings which reportedly works. but got this error message on reboot Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) I assume this means I didn't have the exact settings configured for my laptop. So then I put the result of lspci -v into http://kmuto.jp/debian/hcl/ 0000:00:00.0 0600: 8086:3340 (rev 21) 0000:00:01.0 0604: 8086:3341 (rev 21) 0000:00:1d.0 0c03: 8086:24c2 (rev 03) 0000:00:1d.1 0c03: 8086:24c4 (rev 03) 0000:00:1d.2 0c03: 8086:24c7 (rev 03) 0000:00:1d.7 0c03: 8086:24cd (rev 03) 0000:00:1e.0 0604: 8086:2448 (rev 83) 0000:00:1f.0 0601: 8086:24cc (rev 03) 0000:00:1f.1 0101: 8086:24ca (rev 03) 0000:00:1f.5 0401: 8086:24c5 (rev 03) 0000:00:1f.6 0703: 8086:24c6 (rev 03) 0000:01:00.0 0300: 1002:4e50 0000:02:08.0 0200: 8086:1039 (rev 83) 0000:02:09.0 0280: 8086:4223 (rev 05) 0000:02:0a.0 0607: 1180:0475 (rev b8) 0000:02:0a.1 0c00: 1180:0551 and it requires the intel-agp driver, which reportedly works 80863340 Yes Intel Corporation 82855PM Processor to I/O Controller intel-agp in the Configuration Archive I couldn't find any kernel on any architecture where this can be enabled. Anyway then I tried to rebuild the package with initrd, as I got the impression from the Demudi page that though building a fatter kernel, at least my machine would reboot unfortunately this couldn't be built because yaird, or intramfs-tools or linux-intramafs-tool were not previously installed, and I don't seem to be able to install them, either with apt-get or synaptic, as some list is locked/unlocked so a few questions - can I salvage things at this point or do I have to start over from a fresh install? what did I do wrong and how can avoid similar problems happening again? am I going about this the right way, should i be using initrd? I hadn't got around to installing the VXpocket firmware - though I don't think this was the problem, when booting into the new kernel Alsa couldn't find the soundcard, though I assume it would be solved after the firmware was installed. As much as I enjoy re-compiling and re-installing over and over again, I rather be making some music - thanks in advance peace Hamish Send instant messages to your online friends http://au.messenger.yahoo.com

18 years, 10 months

[linux-audio-user] Problem with seq24: Where's the midi ports?

by Joseph Jones

So I'm looking into using seq24 as my midi sequencer (Rosegarden is slow as all hell, as well as bloated for my tastes, and MusE seems to have problems on my system). I'm fairly sure that I made some use of it when I first installed it, however, I've tried using it with qsynth over the last few days and I just can't seem to be able to connect the two at all. I'm rather concerned that seq24 doesn't seem to have any ports/clients listed in qjackctl's midi section. I can connect seq24 to busses and channels from inside seq24, but that doesn't seem to have any effect. The problem doesn't seem to lie with qsynth as I've been able to connect a software keyboard to it no problem. Has anyone else experienced this at all and can offer some advice on the subject? Cheers! -- Joe Jones -----BEGIN GEEK CODE BLOCK----- Version: 3.1 GIT/MU d-- s+:-- a-- C++ UL+ L++ E---- W++ w M t(++) 5++ tv D++ e+ h-- ------END GEEK CODE BLOCK------

18 years, 10 months

[linux-audio-user] Transparentize ZynAddSubFX

by Carlo Capocasa

User request here! I absolutely LOVE ZynAddSubFX and I haven't found any oscillators, filters, harmonics generators etc. that sound nearly as good. The sounds are simply so natural. Now what I'd like to do is hook up all these things in a modular way. You're looking for a new project to tie your name infinitely to the world audio and enjoy all the privileges of the natural way of the coder. You also have a good ear for fineness. Great! You code. I'll test. The result is a wonderful set of LV2 (new ladspa) plugins that are all the building blocks ZynAddSubFX is made of. They are called ZynAddSubFX LowPass2 Filter etc. to honor the genius of its author. Carlo

18 years, 10 months

[linux-audio-user] Getting some hardware...

by lanas

Hi folks, I'm close now to getting some hardware, so I have more precise questions before I hit one of the music stores. I'd like ot have to suggestions/comments concerning a setup for doing what I'd liek to do. And that is: being able to input sequencer data using three different approaches: percussion, guitar and keyboard. For the sound sources, I'm presently partial to hardware synths/samplers. Although I've got some good sounds in the past (using soundfonts and a Live ! card and MuSE) I still feel that the best sounds are from actual hardware synths and samplers. I'd like to have some feedback on this. Are 'software' sounds really that good when compared to actual hardware synths ? What about samplers ? Are there any pro or semi-pro hardware synth and sampler cards for the PC that could turn a PC (with an additional external MIDI keyboard) into such a beast as these Korg (or others') workstations ? First of all I do not yet have a sound card for the AMD64 MSI K8N Neo4 board I have (4GB RAM and lots of disk space). So far I see these Hammerfall and M-Audio series. I'd also like to get accoustic input from accoustic guitars, flutes, and possibly voices/vocals. And then there's the playback using good speakers. And then there's the MIDI input when more than one MIDI instrument is used at the same time. Surely there must be a patch bay of some sorts. And there are the special effects, of which reverb would be mandatory to start with. So, if I choose the hardware sounds, I'll have to get some kind of external mixer for the line outs of the synths and mikes, isn't it ? What does Ardour mixes after all ? Can it control some kind of hardware mixers of which the knobs were removed (cheaper price ?) so to speak ? Thanks a lot for any comments ! Cheers, Al

18 years, 10 months

[linux-audio-user] Directly editing mp3 files

by Robert Persson

Is there a tool that will allow me to directly edit mp3 files (i.e. without decompressing them first)? I remember that I used to use a program that would do that in mac os 9. There are a couple of situations in which I need to crop or chop up very long audio recordings and where precision is not important, but the time it takes for the various audio editors to read or write huge uncompressed wav files, as well as to compress the edited files, is a real problem. For instance I sometimes collect sonic doodles on a dictaphone, which means that I need to be able to sample an entire side of the tape, go through it very quickly and save the interesting bits for future reference. I don't want to spend hours doing this. I'm not at all bothered whether I use mp3, ogg or something else as the compressed format. If there is something simple that might work under wine I would happily give that a go. Many thanks Robert -- Robert Persson Conspiracy Bears: Once upon a time there were lots of conspiracy bears...

18 years, 10 months

[linux-audio-user] Extreme time-stretching sofware v.0.0.2

by Paul

Hi. I released today the second version of the extreme-time-stretching software. It's here: http://hypermammut.sourceforge.net/src/paulstretch/ News: - Added a graphical user interface (requires wxWidgets). Now you can control the FFT size (buffer size) too. Also, you can use this program as a very interesting effect if you make FFT size large (even if the stretch parameter is close to 1) - Added Ogg Vorbis support for output (requires ogg vorbis libraries) - Added an "optimize" option to the FFT size to make it power of 2 or 3 for speedups (afaik the fftw library is optimised for these kinds of buffers). The disavantage is that the stretch value is now quantised (if you don't like this, you can disable the optimize checkbox). P.S. For now, there is no available resource checking (I mean if your disk is full or the buffer size is too large, the program will crash) Paul __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

18 years, 10 months

[linux-audio-user] audio interface for laptop

by cezar＠mixandgo.ro

Hello, Is there any audio interface with 8 or 10 out that works 100% with linux ? Regards Cezar

18 years, 10 months

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Linux-audio-user May 2006