Linux-audio-user March 2007

linux-audio-user@lists.linuxaudio.org

183 participants
203 discussions

[linux-audio-user] hdsp output 2 is mucky in linux, not in windows

by Rich E

Hi all, sorry if I'm wearing out people's eyes with so much rme troubleshooting... but I'm not quite ready to give up on my $1,300 investment (although close, seeing as how I've only been able to fix about 10% of my problems with the card). So my second output is sometimes just spitting out digital noise. It didn't (for the first time in since it happened) earlier today, but since then I have rebooted and it is back. I have tried the card under windows and I don't have any problems there. Output channels 1 and 3 are fine, most likely the rest are too. Any ideas? regards, rich

17 years, 10 months

[linux-audio-user] Standalone hardware music making box suitable for children?

by Juhana Sadeharju

Hello. What would be a good standalone music making box? A box which would be useful for a child, for her first 16 years. Features: -Linux connection (midi, sample uploads) -One shot samples (for sound effects) -Music instruments (sampled or synth) -Music making (patterns whatever) I know there are some kind of groove boxes but don't know details. Juhana -- http://music.columbia.edu/mailman/listinfo/linux-graphics-dev for developers of open source graphics software

17 years, 10 months

[linux-audio-user] Applying patch-2.6.20-rt8

by David Baron

Tried to make a patched 2.6.20.1 using make-kpkg. Cannot find patch for patch-2.6.20-rt8. How do I do this (since this is not a debian-installed patch package)?

17 years, 10 months

[linux-audio-user] Rotter question...

by Mike Lyon

Hello, I am trying to get Rotter to work on Ubuntu 6.10. I compiled the code and everything but when I try to run it, I get these funky errors: mlyon@kkup-audio:/usr/local/bin$ sudo rotter -a -f mp3 -d 1000 -b 160 -v /var [DEBUG] Mon Mar 12 15:04:47 2007 Root directory: /var jackstart: cannot get realtime capabilities, current capabilities are: =ep cap_setpcap-ep probably running under a kernel with capabilities disabled, a suitable kernel would have printed something like "=eip" back from read, ret = 1 errno == Success jackstart: could not give capabilities: Operation not permitted jackd 0.101.1 Copyright 2001-2005 Paul Davis and others. jackd comes with ABSOLUTELY NO WARRANTY This is free software, and you are welcome to redistribute it under certain conditions; see the file COPYING for details JACK compiled with System V SHM support. loading driver .. creating alsa driver ... hw:0|hw:0|512|2|48000|0|0|nomon|swmeter|-|32bit control device hw:0 configuring for 48000Hz, period = 512 frames, buffer = 2 periods nperiods = 2 for capture nperiods = 2 for playback [INFO] Mon Mar 12 15:04:48 2007 JACK client registered as 'rotter'. [DEBUG] Mon Mar 12 15:04:48 2007 Size of the ring buffers is 2.00 seconds (384000 bytes). [ERROR] Mon Mar 12 15:04:48 2007 LAME (MP3 codec) support was not available at compile time. [DEBUG] Mon Mar 12 15:04:48 2007 Failed to initialise encoder. mlyon@kkup-audio:/usr/local/bin$ I have lame installed: mlyon@kkup-audio:/usr/local/bin$ whereis lame lame: /usr/bin/lame /usr/X11R6/bin/lame /usr/bin/X11/lame /usr/share/man/man1/lame.1.gz mlyon@kkup-audio:/usr/local/bin$ and I have Jackd installed: mlyon@kkup-audio:/usr/local/bin$ whereis jackd jackd: /usr/bin/jackd /usr/X11R6/bin/jackd /usr/bin/X11/jackd /usr/share/man/man1/jackd.1.gz mlyon@kkup-audio:/usr/local/bin$ It appears as if i will have to recompile it, which is fine. But, I did have LAME installed on the machine prior to the time I compiled rotter. Any help would be appreciated. Thank You, Mike Lyon KKUP Public Radio Cupertino, Ca

17 years, 10 months

[linux-audio-user] [estark@law.harvard.edu: [cc-community] Freeculture.org Announces the Free Music Project and OLPC Curation]

by Thorsten Wilms

----- Forwarded message from Elizabeth Stark <estark(a)law.harvard.edu> ----- Date: Fri, 2 Mar 2007 12:10:32 -0500 From: Elizabeth Stark <estark(a)law.harvard.edu> To: cc-community(a)lists.ibiblio.org, icommons(a)lists.ibiblio.org PRESS RELEASE -- FOR IMMEDIATE RELEASE Contact: freemusic(a)freeculture.org Elizabeth Stark, Freeculture.org Tim Hwang, Antenna Alliance FreeCulture.org Launches the Free Music Project New website will let Internet users upload and share freely licensed music from all countries and genres Cambridge, Massachusetts, March 2, 2007 -- Freeculture.org announces the launch of a new website, http://freemusic.freeculture.org, dedicated to sharing great free music, encouraging artists to release music under free licenses, and providing access to recording and production time to artists releasing works under a free license. Users can upload music from their own computers or link to music on another website distributing freely licensed music. Songs uploaded can be streamed, downloaded and remixed into new creative works. The Free Music Project will collect and record free music for children. Selected songs uploaded to the site will be included in the first music library shipping with laptops from One Laptop per Child (OLPC), a non-profit organization devoted to improving education that is producing low-cost, high-quality computers to distribute to children and teachers in the developing world. "This is a groundbreaking opportunity to locate the best free music out there and share it with millions of people of all ages around the world," said Elizabeth Stark, board member of Freeculture.org and founder of the Free Culture group at Harvard. "Freely licensing recordings allows artists to gain extremely valuable global exposure through projects such as OLPC." Freeculture.org will also work with creators and musicians to record and license songs for the project, in collaboration with the music recording project Antenna Alliance. The Free Music Project site will provide access to uploaded music, and includes community-oriented functionality such as tagging, forums, and ratings. "This project not only marks a milestone in the position of free music worldwide, but also opens a vast universe of possibilities for the development of an international community of artists and producers committed to free culture," said Tim Hwang, President of Antenna Alliance. For more information: FreeCulture.org is an international organization that promotes the creation of a thriving cultural commons, in part by encouraging the use of free licenses by artists and creators. (http://www.freeculture.org) Antenna Alliance is a Boston-based recording label that records, promotes, and distributes freely licensed music online and across a nationwide network of radio stations. (http://www.antalliance.org) One Laptop per Child (OLPC) is a non-profit organization created by Nicholas Negroponte and other faculty members from the MIT Media Lab to design, manufacture, and distribute laptop computers that are sufficiently inexpensive to provide every child in the world with access to knowledge and tools for learning and exploration. (http://www.laptop.org) _______________________________________________ cc-community mailing list cc-community(a)lists.ibiblio.org http://lists.ibiblio.org/mailman/listinfo/cc-community ----- End forwarded message ----- -- Thorsten Wilms Thorwil's Creature Illustrations: http://www.printfection.com/thorwil

17 years, 10 months

[linux-audio-user] Re: OT: Berlin/LAC

by subluid＠gmx.net

once more, sorry about forgetting the subject: Dmitry Baikov wrote: > > >> 2. How it is better to get to Koeln and back (if it is train, how and >> where to buy tickets) and in which weekday hello Dmitry looking for a bus for berlin/cologne did not give me any result. There is a bus once daily to Duesseldorf near cologne (http://www.berlinlinienbus.de/) ((no English version yet, its germany2007!!^_°)) 74 eu for a return ticket. A pdf timetable is here: http://www.berlinlinienbus.de/pdfs/dus.pdf payment with credit card, you should book several days (at least five) in advance as seats sometimes become rare. >From Duesseldorf to Köln there are regional trains ("S-Bahn" or "Regionalexpress") for 9.30 eu (Preisstufe 5ü) one way, about one hour. url: http://www.vrsinfo.de/eng/index.php - by tickets at the station. BUT: at least a 10 h trip, i cannot recommend it. http://www.mitfahrgelegenheit.de (pre-arranged lifts in private cars) is used a lot and usually works well. people charge ~25-30 eur for the trip. Unfortunately everything there is german, you get email and/ore phone number for making an arrangement. I offer help in searching/translating/making phone calls to german numbers. do svedanja, david -- Der GMX SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen! Ideal für Modem und ISDN: http://www.gmx.net/de/go/smartsurfer

17 years, 10 months

[linux-audio-user] rt8 patch to 2.6.20.3

by David Baron

kernel/time/clocksource.c requires an #include <linux/tick.h> to compile and LD timer built-in correctly. This is apparently new to the .3 version. So .. does the rt8 patch touch this file (deleting/omitting this #include)?? If so, then it should be fixed. If not, a bug should be filed against the kernel source.

17 years, 10 months

[linux-audio-user] Noise problem, qsynth, jack

by julien bodd

Hi all, I use my midi keybord to play soundfonts on qsynth (via jack). The problem is that a lot of soundfonts sound bad. I hear some ssshhhhh noise when I play a note. On some soundfonts this problem appears with a simple key press (this might be a bad soundfonts), but on others, it appears only when I hit the key with more power, or if I play multiple notes at the same time (then there is sound saturation) Also, I have jack Xruns (more and more when using at the same time freewheeling, mutiple qsynth, hydrogen..) In general, the sound quality is bad (even when not using qsynth but zynadd, ...). All of my records are bad. My PC : - 1GB ram - 2.6 Ghz Sound card : well..an old soundblaster 128 (could this be the problem?) My jack configuration is : - real time - no memory lock - soft mode - force 16bit - priority : 50 - frames/perdio : 512 - sample rate : 48000 - periods/buffer : 2 - port maximum : 128 - timeout : 2000 it shows as result latency : 21.3 msec qsynth config : - sample rate : 48000 - buffer size : 512 - buffer count : 2 - polyphony : 256 - sample format : 16bits How can I improve sound quality ? (ps : mic & capture are turned off) thanks a lot !

17 years, 10 months

[linux-audio-user] Re: Recommendations for SPDIF/AESEBU (Bill Adair)

by Phil Mendelsohn

>> Are you aware of the Shannon Nyquist Sampling Theorem: >> > >> > http://en.wikipedia.org/wiki/Nyquist-Shannon_Sampling_Theorem >> > >> > Its corollary is that if you downsample and then upsample, the data >> > destroyed during the downsampling can *never* be recreated. >> > > >All right hi-fi is probably the wrong word for the end result but better >sounding is the aim and allowing experimentation by hard drive audio users >without spending silly money on cables, DAC flavours of the month etc. Erik and Bill -- actually, there is some reason to consider upsampling, but only before further processing (usually filtering) is done. The argument has to do with shifting noise artifacts generated during processing out of the audible band. Andy Moorer wrote a paper on it about 10 years ago; don't have the citation handy, but Google his collected papers, or look at the AES (www.aes.org) publications (not free ). :( That said, it's probably one of those (many) things that don't really mean much unless you're in a carefully controlled listening environment, etc. And it'll be lipstick on a pig if you have other problems in the recording. Upsampling does not require a "convoluted" algorithm, either -- unless you're talking about polynomial interpolation of higher order or something, Bill. Probably not worth the clock cycles. Cheers, Phil M -- "To misattribute a quote is unforgivable." -- Anonymous

17 years, 10 months

[linux-audio-user] (very) low-end recording solution

by steev

Hi I've a friend who's planning to record lessons for the language courses they teach but doesn't know a great deal about computers and seemingly only has access to very old hardware. I was wondering if anyone else has experience in using linux audio on win-98/me era machines, and could point me at a distro or any packages that would be useful for a (very) low-end recording solution for the beginner. Recommending new hardware isn't completely out of the question (I think an external HDD and a CD writer is a bare minimum, and we'll be buying a mic of course), but I'd rather get them up & running with as little extra expense as possible. I've been using Agnula & now 64studio for the last few years but I mostly work in Csound/Blue and SC, so I have slightly skewed view of the linux audio world :-/ Thanks all.

17 years, 10 months

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Linux-audio-user March 2007