Linux-audio-user June 2010

linux-audio-user@lists.linuxaudio.org

143 participants
146 discussions

A weak link in the license chain: Releasing on false assumptions?

by Nils Hammerfest

Hello list, any opinion or experience for this case? The main question is: Who is responsible? A free, copylefted work is taken to build a derived work. This is realistic for GPL but much more realistic for a Creative Commons work, maybe a music piece. The derived work is released properly and 100% according to the original license, so there is no problem in that. (Imagine here a phase in which the derived works becomes popular, but that is not strictly necessarry) Later it turns out that the original work itself was a copyright break because music was stolen or the code was taken from a closed program where the initial releaser had access to (@ work or however). Now what happens? Of course the intial release was wrong and there will be legal consequences, no question. But what about the derived works and their derived works? Greetings, Nils

14 years, 5 months

rakarrack-0.5.8_Equinox is released

by Josep Andreu

Hi We are pleased to announce the release of rakarrack 0.5.8 Equinox, a summer gift. This is a major feature release, but we have also fixed many old bugs. We know that today is a Solstice, but we think that Equinox is a better definition for this version because we have worked diligently since release of 0.4.2, and 0.5.8 for us is like the start of a new cycle in the development of Rakarrack. Releasing on a Solstice is simply because this is a good reason to celebrate if you're a musician with preference for free open source software. http://rakarrack.sourceforge.net NEWS New Bank File format, we include a utility "rakconvert" to convert Bank files to the new format. New Effects: Valve, Dual Flange, Ring, Exciter, Expander, DistBand, Arpie, Shuffle, Synthfilter, VaryBand, Convolotron, Looper, MuTroMojo, Echoverse, CoilCrafter, ShelfBoost, Vocoder, Sustainer, Sequence, Shifter, StompBox, Reverbtron, Echotron. New Features: Tap Tempo. Upsampling using libsamplerate by Erik de Castro Lopo. Downsample intesive CPU effects. Upsample Waveshapper. ACI Analog Control Interface. Waveshappers: M.Saw, Compress, Overdrive, Soft, Super Soft, Gard Compress, Lmt-NoGain, Hard Compress, FET, DynoFET, Valve1, Valve2, Diode clipper. LFO Modulation: M.Saw, L.Fractal. Improvements: GUI DC Offset Filter at the input. Tuner Callibration Auto Connect jack input ports. GUI and bug fixes. The rakarrack team: Josep Andreu - Ryan Billing - Douglas McClendon - Arnout Engelen -- Josep Andreu <holborn(a)telefonica.net> -- Josep Andreu <holborn(a)telefonica.net>

14 years, 5 months

Vuvuzela Concerto in Bb flat. Arr by Andrew Coughlan

by Andrew C

Hey list, It's my, ah, interpretation of the Vuvuzela Concert in B flat. I'll just leave this here... http://moose.linux-coders.org/Mooseh/Vuvuzela-Concerto.mp3 http://moose.linux-coders.org/Mooseh/Vuvuzela_Concerto_in_Bb.jpg is the sheet music (not written by me.) Andrew

14 years, 5 months

Sound quality with different music players

by bl4

Hello, Suppose I have cheap onboard soundcard and cheap speakers, two different music players (for example mpd and mplayer) with the same output interface (both using alsa or both using oss compatibility layer), no resampling, filters or anything, with dmix disabled and no other software mixers. Is it normal (or possible) that for the same audio files each player will produce noticeably different (in terms of quality) sound? In other words, does the choice of music player have any impact on final sound quality? -- bl4

14 years, 5 months

jack jenanigans

by J.

Hi, I'm using ubuntu studio lurid lynx. I'm relatively new to Linux and have No Idea as to how to use the command line. I basically use Windows. I'm doing a favor for a friend who must have his computer set up and he is in no condition at the moment to do it himself. And- only Linux! I'm running a m-audio audiophile 2496.and: I must know (1) Why when the jack control setup says sample rate 44.1 the status says 48. All I need at this point is 44.1 who do I change it to that. (2) There are times when I need to stop jack. When I do the disk player clicks and played 1/step flat. and my finale notation on wine doesn't access timidity++ (as it does before I start jack). What is the problem? (3) I have had to shut off timidity++ on the command line to get it to start as a Rose garden service. I have forgotten how to do this and how to start it for Rose garden. sometimes when I start timidity++ as a Rose garden service every thing crashes What to do. I'd appreciate some ad vice and help and thanks in advance. Jonathan __________ Information from ESET NOD32 Antivirus, version of virus signature database 5235 (20100628) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com

14 years, 5 months

Music made with linux: Lawrence Crow live set

by micromoog

Hi folks. Last night I played a live set at a bar in Nashville, Tennessee, USA, using only an Ubuntu laptop with SuperCollider: http://lawrencecrow.bandcamp.com/track/bettys-2010-06-28

14 years, 5 months

Music made with linux: Det nu (breakcore remix)

by Atte André Jensen

Hi I've done a remix of one of my older tunes for my project "modlys". It's a bit harder than usual, actually I know that this style is simply too much for some (most?) people. But I share it here anyways, hoping someone enjoys it... http://music.modlys.dk/track/det-nu-breakcore-remix http://modlys.dk/audio/det_nu_breakcore.ogg http://modlys.dk/audio/det_nu_breakcore.mp3 -- Atte http://atte.dk http://modlys.dk

14 years, 5 months

jackd in RT mode at boot

by Lists Parisson

Hello, I need to start jackd server in realtime mode on boot for an audio embedded Linux based project. However it seems that for OS using PAM like Debian, it's impossible to get RT priorities for the predefined jackd user during the boot. I know that starting jackd on boot is something deprecated on most distributions for security reasons. But, for an embedded system, I think this makes sense as no other user will ever log in. So, here's my question : how to get RT priorities for non-root users on boot for jackd 0.118 or 1.9.5 ? Thanks for help, Cheers, Guillaume Pellerin PS : of course, on my system, the jackd server is working perfectly in RT mode when the user log in and manually start the daemon, even in sudo mode..

14 years, 5 months

digital upgrade of older equipment via I2S with jitter attenuating S/PDIF receiver evaluation board ??

by Niels Mayer

There's this interesting product I came across: an evaluation board from Wolfson Micro for the WM8804 high-performance SPDIF transmitter: http://www.wolfsonmicro.com/news/258 . This might be an interesting way to upgrade older soundcards (e.g upgrading 10 year old ICE1712 designs w/ modern DACs & reduced jitter while still retaining stable snd-ice1712 drivers) or digital synthesizers and other A/V equipment to give older perfectly serviceable equipment the latest D/A's and an improved output section. http://www.wolfsonmicro.com/products/WM8804 http://www.wolfsonmicro.com/uploads/documents/en/WM8804EV1M_Configurations.… http://www.wolfsonmicro.com/uploads/documents/en/WM8804_Schematic%20and%20L… Lots of potentially useful applications with this evaluation board, all ready to go: * optical/coax --> spdif with de-jitter. * i2s --> spdif with de-jitter * resync incoming i2s stream w/ external spdif clock * USB control (?) * onboard monitoring via WM8726 high performance stereo DAC up to 24bit/192k, w/ hardware selection of data interface format, mute, de-emphasis, justification, etc. (which should make it easy to work with or emulate existing computer soundcard DAC's that one might want to update to the latest technology). I'd like to hear people's opinions on whether this is a useful or good product to invest time into? Specification-wise, the de-jittering capability looks impressive, appears to better some of the competing products "on paper." All of which might make the $200.00 pricetag (for the evaluation board, not the chip itself) palatable (I've called the local distributor for samples). Once proven, such a circuit could be constructed for far less than $200 cost of the evaluation board. The WM8804 itself is pretty cheap and fairly self-contained, and so is the included DAC.... Then again, so is http://cgi.ebay.com/24bit-192KHz-DAC-DIY-KIT-FULL-ASSEMBLED-KIT-PCM1798-/33… or http://cgi.ebay.com/HIgh-End-CD-Player-DAC-Upgrade-Mod-Kit-BB-PCM67U-DAC-AE… versus http://www.mouser.com/ProductDetail/Wolfson-Microelectronics/WM8804-6152-DS… WM8804-6152-DS20-EV1 Manufacturer: Wolfson Microelectronics Description: Audio Modules & Development Tools WM8804 Eval Board ........ The WM8804 is a high performance S/PDIF transceiver which offers a state-of-the-art jitter attenuating S/PDIF receiver design. The WM8804 customer evaluation board provides full functionality for the evaluation of the WM8804 device. ... Software to configure the evaluation board can be downloaded from http://www.wolfsonmicro.com/support/drivers (unfortunately, all the drivers SW is for Windows, and http://opensource.wolfsonmicro.com/ doesn't mention the 8804...). .... Niels http://nielsmayer.com

14 years, 5 months

Re: [LAU] jackd in RT mode at boot

by Lists Parisson

Le 29/06/2010 16:43, Mike Cookson a écrit : > There is /etc/default/jackd config file, but I am not sure, is it works (never used). > > Yes but this works only in non RT mode, that is without the -R option. In this case, jackd is not started with RT priorities.. Cheers, Guillaume

14 years, 5 months

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Linux-audio-user June 2010