Linux-audio-user April 2004

linux-audio-user@lists.linuxaudio.org

141 participants
177 discussions

[linux-audio-user] Latest release of FreqTweak

by Jesse Chappell

Anouncing version 0.6.0 of FreqTweak. http://freqtweak.sourceforge.net New in this release are spectral filter Modulators, which can animate and modulate any of the filters automatically in several ways. If you thought FreqTweak was fun before, be prepared for hours of audio mayhem. See the webpage (and the software) for details. Just in time for the ZKM/LAD conference in Karlsruhe :) Please report any problems compiling this release on your various platforms to me, and as always report any bugs or feature requests to freqtweak-user(a)lists.sourceforge.net (you must subscribe first). Enjoy, Jesse Chappell ------ FreqTweak is a JACK-based application for FFT-based realtime audio spectral manipulation and display. It provides several algorithms forprocessing audio data in the frequency domain and a highly interactive GUI to manipulate the associated filters for each. It also provides high-resolution spectral displays in the form of scrolling-raster spectrograms and energy vs frequency plots displaying both pre- and post-processed spectra. -------

20 years, 8 months

[linux-audio-user] log sine sweeps

by mrtn

hello, i am trying to record impulse responses from my studioequipment to correct it's phase and freq responses with e.g. DRC and bruteFIR. I heard the best idea would be to take log sine sweeps for the measuring? it would be great if someone more experienced than me knows of a good method to create sweeps (or chirps) of equal freq.response with linux software?! or maybe some other tips and tricks about audio impulse response measuring with linux? peace mart

20 years, 8 months

[linux-audio-user] Suddeny, snd-usb-audio has loads of undefined symbols!

by David Baron

Did not upgrade anything touching this, too my knowledge. Doing a cat /dev/midi1 from the device connected to USB shows normal operation. What gives?

20 years, 8 months

[linux-audio-user] Recording RealPlayer

by Christian Convey

Hi guys, I was wondering if someone could recommend a good way of recording RealAudio streams so that they ultimately end up on disk as .wav or .mp3 or .ogg files. I looked at Jack, but RealPlay isn't listed as one of Jack's compatible applications. I looked for a RealPlay plugin for XMMS (someone said he used that plugin and XMMS's Disk Writer plugin), but I couldn't find it anyway. Any help would be most appreciated. Thanks, Christian

20 years, 8 months

[linux-audio-user] Cheap 5.1 soundcard?

by olig9＠gmx.de

Hi, as the onboard soundchip on my Epox 8RDA3+ (CMedia 9739) doesn't work very well, I'm looking for a cheap soundcard which can handle 5.1 sound. It should run under Linux (Debian Sarge, Kernel 2.6) and Win98, and I want to be able to play AC3 sound (that can be done in software, right?). I've already looked around and found several cheap 5.1 cards, but I have doubts about their Linux compatibility... Can you tell me something about these cards: Creative Soundblaster 4.1 Digital Creative Soundblaster live 5.1 Digital Typhoon Acoustic Six 5+1 Terratec Aureon 5.1 Fun Is any of these cards well supported by Alsa, and can I play 5.1 and AC3 sound with it? I've already nearly decided for the SB live 5.1 Digital but then noticed that it's not that well supported... Or is there any other card which you could recommend? I don't want to spend too much, it should definitely stay below 50 EUR, but I don't have high expectations (playing MP3s and games, watching movies, getting system sounds...). Thanks in advance for your help, Oliver Gerlich

20 years, 8 months

[linux-audio-user] BR532 multitracker file format / sync

by Joe Button

Hi there. I have a Boss BR-532 digital multitrack, which saves my songs onto SmartMedia cards. I can then get these files onto my PC using a USB card reader. So far so good. Two questions: 1) Probably a long shot, but does anyone have any clue as to how I might convert the files from the BR-532's internal format to WAV or whatever? I can do this using a Windows GUI program supplied by Boss (runs fine under wine), but the interface is rather fiddly and limited. Any chance I might be able to do this eg. with some kind of command line / scriptable tool? Cursory Googling hasn't revealed a lot about the file formats to me - they're described as 'MT2', 'LV1', and 'LV2' (in decreasing order of sound quality). I usually use LV2 (for that much sought after lo-fi sound...). 2) Once I've got my WAV files, can I just drag them into Audacity / Ardour etc and assume they'll stay synced? Or is some kind of additional syncing used to keep tracks aligned? Thanks for any help.

20 years, 8 months

Re: [linux-audio-user] BR532 multitracker file format / sync

by Joe Button

[sorry if people get this message more than once - technical probs] On Thursday 22 April 2004 11:04, Joe Button wrote: > Hi there. > > I have a Boss BR-532 digital multitrack, which saves my songs onto > SmartMedia cards. I can then get these files onto my PC using a USB card > reader. ... > does anyone have any clue as to how I might > convert the files from the BR-532's internal format to WAV or whatever? I > can do this using a Windows GUI program supplied by Boss (runs fine under > wine), but the interface is rather fiddly and limited. As an aside, in case it helps anyone else, I had to put this in ~/.cxoffice/dotwine/config to get the file converter prog to recognise my local copy of the files as a windows drive: [Drive Q] "Path" = "/home/joe/br532/hd" "Type" = "hd" "Label" = "Memory card" "Filesystem" = "win95" So now I can copy my SmartMedia card's contents into /home/joe/br532/ rm -rf /home/joe/br532/hd/ cp -a /mnt/hd /home/joe/br532 and card's contents then show up as drive Q in the nasty Windows converter thingy. Of course it would be possible to just make '/mnt/hd' drive Q and work directly from the card, but this way I get to back everything up at the same time. Probably not very interisting to most of you, but maybe oneday some will find this in the archives and be eternally grateful...

20 years, 8 months

[linux-audio-user] New Kernel with Sound; Victory at last!

by Martin McCormick

Last weekend, I finally got ALSA installed and working. I guess the third week is a charm. My thanks to everybody on the list who helped me get on the right track. The Debian package archive had alsa-utils, but they appear to have not yet been updated. I got the most recent one from the alsa-project web site and it appears to be fine. The only slight ill effect I noticed was that all the man pages ended up in a directory that Debian Linux doesn't normally use in the man hierarchy, but the fix was a simple matter of copying the files in to the preferred directories. amixer works properly as far as I can tell. Is there a listing anywhere of the purpose of the simple mixer controls? A few of them aren't obvious as to what they do. By turning on the mono-output switch, I even patched sound card sound to the tiny speaker that is local to the P.C. That hasn't been possible since my wife had Windows NT on this system and I remember hearing sound through that speaker. Another interesting thing I noticed was that the Capture switch on Simple mixer control 'Master Digital', seems not to prevent recording of audio. The whole effort was well worth the time and hats off to all those who have written the ALSA software. One thing I discovered by accident is that /dev/dsp now works in full duplex. It used to be that if it was used for recording, one couldn't play any audio through the sound card without a "device busy" message and an immediate stop to the program. Now, /dev/dsp for capture appears to be different from /dev/dsp for playback. That is impressive. Martin McCormick WB5AGZ Stillwater, OK OSU Information Technology Division Network Operations Group

20 years, 8 months

RE: [linux-audio-user] Quattro USB

by Matthew Allen

I never saw it as a vendetta, just more of a "this thing stole months of my life away, please don't let it steal months from yours" :) m. > -----Original Message----- > From: linux-audio-user-bounces(a)music.columbia.edu [mailto:linux-audio- > user-bounces(a)music.columbia.edu] On Behalf Of Josh Steiner > Subject: Re: [linux-audio-user] Quattro USB > > i really just need to point out that frank seems to have a personal > vendetta against the quattro. it does violate the USB spec in a minor _________________________________________________ Scanned on 21 Apr 2004 17:50:42 Scanning by http://erado.com

20 years, 8 months

RE: [linux-audio-user] Quattro USB

by Reuben Martin

> > Not having purchased the Quattro yet, can you or anyone else > reccomend the > Quattro, or is there a better USB multi-input unit out there > that I should > look at? > I would recommend against USB audio devices. I'm sure there are plenty of people who would swear they've had nothing but positive experience with USB devices, but just the same they are a nightmare. The USB audio specs are are defined in a manner that create a real mess for people who write the drivers for them. >From the jack dev list: "USB spec defines the isochronous data packets for the fixed time length (1ms). and, obviously, 44100Hz cannot be split by 1ms in integer." Also, read this: http://boudicca.tux.org/hypermail/jackit-devel/2003-Sep/0167.html I would strongly recommend using a PCI device if at all possible. -Reuben

20 years, 8 months

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Linux-audio-user April 2004