Linux-audio-user January 2010

linux-audio-user@lists.linuxaudio.org

166 participants
153 discussions

Klactoveedsedstene - a new MPlayer Frontend

by Viggo Simonsen

Hi all, I am happy to announce that a new Mplayer frontend (for Linux) has been launched. Klactoveedsedstene is an Audio Player frontend to the popular Mplayer engine, written in Java. It has an advanced support for Album Art. It recognizes embedded Album Art, and is also mostly able to find the correct Album Art from the Internet, based on the "Artist" and "Album" ID3-tags Features: Fast and compact Advanced Album Art support with almost 100% accuracy. Select and Play All-in-one window Drag and Drop music into the library Supports MP3 and WMA Highly configurable Stateful (remembers your window settings) All parts of the GUI can be colored Album-Artist-Track view All track columns sortable and movable Minimizable Have a look, and a try at http://www.klactoveedsedstene.com Best regards Viggo Simonsen

15 years, 10 months

Linux audio app design: The nature of xruns

by lanas

Nature of xruns I never paid attention to mentions of xruns since I rarely got them using a stock Fedora 8 kernel (and F6 before that) on a x86_64 architecture, 4GB RAM. Yesterday though, I got plenty of them and my observation is that in this case any real-time feature associated to the kernel does not matter. In this case the xruns are made by the way applications handles stuff (whatever that is). So that makes me think that there ought to be a guideline, a best practices in developing Linux audio/jack applications. Here's the observation setup. First, the song. The song does not matter, It always plays fine. The song is made by the use of Seq24 which drives several soundfonts loaded by Qsynth in different engine instances, as well as two sounds made by Zyn. Qsynth has several instances of FluidR3_GM (120MB) and one SGM (250MB) loaded. Second, the xruns. I take the outputs and drive them through jackmix, add electric guitar line-in from a Vox amp, and have the outputs of jackmix feed into Qarecord. Start recording. The .wav result is polluted with xruns. Third, same song w/o xruns. I terminate jackmix and Qarecord and launch Ardour. I run all outputs into Ardour, and run the electric guitar as well. Add some Freeverb and MultiEQ. Record. No xruns at all in the resulting .wav file. From this it is obvious that the application layer helps a lot in promoting xruns. It is safe to assume that Qarecord is a quick hack. But, there's seemingly a big difference in application design regarding the handling of audio/jack stuff between Qarecord and Ardour since one produces a festival of xruns and the other none. My question is, is there a guide/HOWTO around that addresses the proper design of audio/jack applications or, is - in 2009 - the only to know about that is by actually going through the source code of successful Linux audio/jack applications ? Cheers.

15 years, 10 months

[PATCH] eMagic emi26 and emi62m new firmware versions

by Monty Montgomery

In addition to the patches from earlier that restore the emi62m firmware loader to function (and reinstates the correct bitstream.HEX file for the device), I've extracted updated firmware from the last (to my knowledge) free (beer) software update provided by eMagic. The update was labelled firmware 2.2 and the updater was for MacOSX 10.2.3 PPC. I noticed that the previous round of firmware loader fixes hasn't made it into any of the test kernels yet (or has it and I missed it?) So I've included the loader fixes to date and the firmware update into a single patch that works on stable kernel releases 2.6.27 up to at least 2.6.32.2. That said--- The licensing boilerplate included with this 'free software update' from eMagic may or may not allow eventual kernel inclusion; I've always been a little surprised the original 1.0 firmware as used in the current in-kernel driver was acceptably licensed. Even if not, this update is undeniably useful to anyone who has one of these devices and so I've made it into one big patch that can perhaps be unofficially 'helped along' to those folks wo could use it. The firmware update information includes various vague statements of 'improves latency and performance', but the biggest thing I notice is that it has cured several minor but annoying bugs in the 6|2m, like the fact that sampling always starts with neither analog nor digital input actually internally selected/working and you have to flip the physical switch on the front of the unit to wake it up every time you begin recording... The all-in-one patch is large and so stored here: http://web.mit.edu/xiphmont/Public/emi/emi-firmware-update.patch ...and also wrote a longer blog post featuring both patches here: http://xiphmont.livejournal.com/46858.html If you prefer just the new .HEX files, let me know. Cheers, Monty

15 years, 10 months

Re: [LAU] n00b help with MUSE, and another thing

by sonofzev＠iinet.net.au

On Wed Jan 6 15:08 , "J. Simon van der Walt" sent: >I'm trying to get going with MUSE, watching this video > >http://www.youtube.com/watch\?v=11VWsbeT35s#t=1m44s > >At the point linked to, the contextual menu shows 'Add Synth', but I >don't seem to have that option; various other types of track I can >add, but not that. Any ideas? > >Second, probably stupidly basic and annoying question; as soon as I >launch Jack, I lose all sound from the YouTube video I'm trying to >watch in Firefox. How does one get around that? > >tia > >-- >J. Simon van der Walt - Composer >www.jsimonvanderwalt.com >+44 (0) 7905 270 198 I can't give yyou direct help now as I'm at work and I use MusE almost exclusively with outboard gear.. .. However I recommend you join the muse-user ML there are lots of helpful people on there who a As for watching the video in youtube and firing up jack... I can't help at all...

15 years, 10 months

rpm challenge 2010

by Atte André Jensen

Hi I missed the rpm challenge 2009, and I'm eager to join this year. However the website (http://www.rpmchallenge.com/) still doesn't mention 2010 and have 2009 all over the place. Anyone knows what's up? Will there be a rpm10 or? How about last year, when was it possible to join the challenge? -- Atte http://atte.dk http://modlys.dk

15 years, 10 months

For Composers: unusual Songwriting Competition

by Viktor Mastoridis

(I am cross-posting to make sure evr1 gets it) Guys, You have shared (and keep sharing) your 'trade' secrets with me and all of us here unselfishly, and here are my 5p There is a songwriting competition where the search is for good songs recorded on guitar/vocal or piano/vocal only. So, bare bones only, no stardust production fx. It looks v interesting and promising, pricing is reasonable and details are here: http://www.eskal-8.com/ (click on Production) Good luck --- Viktor Mastoridis --------------------- Merry Christmas and a Happy New Year Убав Божиќ и Среќна Нова Година Καλά Χριστούγεννα και Ευτυχισμένο το Νέο Ετος

15 years, 10 months

multi-channel recording

by Edward Barrow

I've been getting by so far with an amd64 box running debian, jack, ardour etc through Terratec DMX-6fire (Envy24 based) card, but now find that I need to record more channels simultaneously. I would like (and can just about afford) the M-Audio FastTrack Ultra, but it doesn't look as though it is going to be easy to get it to work under Linux. It's a USB 2.0 device - it needs those 480Mb/s to record 8 channels simultaneously - so it isn't class-compliant. Has anyone succeeded in getting this interface to work properly in Linux? If not, can anyone suggest alternatives in the same sort of price range? Thanks, Edward

15 years, 10 months

can this be done with audio synthesis languages

by rosea grammostola

Hi, Dunno if this is a stupid question or not, and just for orientation... Is it possible to make a sort of 'Ableton Live like setup' with audio synthesis languages like supercollider or pd? E.g. to be able to play/record audio loops, midi stuff, changing parameters like bpm in realtime mode etc? \r

15 years, 10 months

Fat tomtoms from the overheads, potentially interesting info for drummers on a budget.

by alexander

I've discovered a somewhat crude way of getting a "fat" tom tom sound from the overheads, not magically doing away with close up micing of toms. But if you're on a budget (like me) and only have 4 inputs available It works quite well.(note: you will also need a separate snare track) It's quite simple: Insert an EQ on the overheads and boost around 70-120Hz (depending on how the toms are tuned, use your ears ;)) Now, we got more fat out of the toms, but, the snare drum is most likely ruined, unless you want it to sound muddy of course. To fix this we move the snare track so it's in phase with the overheads, then invert the polarity and most of the mud in the snare drum should be canceled out from the overheads. I suspect an XY placed above and in line with the toms yields the best result.. I'm not sure if this actually is usable in the real world as I have not tested it properly yet, i.e mixing in other instruments and so forth. And then there's the chance that someone already tried it and scrapped it :P. The clips are from a session when I tested a drum kit that I've actually built (I'll tell you more about this if anyone's interested) Recorded in a modern super expensive studio where I study, but all mixed in ardour... The filename says what's goin on.. http://g.imagehost.org/download/0746/noToms http://g.imagehost.org/download/0188/WithToms http://g.imagehost.org/download/0878/rawOverheads

15 years, 10 months

M-Audio FastTrack Pro in 48Khz mode?

by Ken Restivo

I saw some stuff float by on the list about putting an M-Audio FastTrack Pro into 192Khz or some other insane mode. I have a FastTrack Pro, and I'd be happy to get it into 48Khz mode. It has been stuck at 44.1Khz for almost 3 years now. The docs on the ALSA WIKI listed some flags to the driver that were supposed to make the interface change sample rates. I tried them, years ago, and they didn't work. Do they actually work? If I screw them up, do they do any permanent damage to the interface (i.e., like it getting into some strange state and being unable to get out of it)? I have got: Advanced Linux Sound Architecture Driver Version 1.0.18a. Compiled on Feb 3 2009 for kernel 2.6.26.8-rt12-kr2 (SMP). -ken

15 years, 10 months

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Linux-audio-user January 2010