Linux-audio-user February 2011

linux-audio-user@lists.linuxaudio.org

157 participants
129 discussions

by lanas

Hi all, A colleague at work offered me to try his newly-bought cheap ($150) USB guitar. He hasn't tried it himself, waiting to build a workstation dedicated to it. So I'm wondering, are these guitars outputting through USB actual MIDI notes as a regular MIDI guitar would (eg. the Godin MULTIAC nylon string guitars ...) enabling playing, say, zynaddsubfx from the guitar ?

13 years, 9 months

bad news/good news

by Giorgio - Audiophilo

Hi everybody, as some of you may know in late 2009 i started a professional recording studio called Kubistudio and based in Milan, Italy. During this year we have achieved many results, we have constantly worked with a very popular italian radio (Lifegate) and recorded, mixed and mastered many local and international artists. Some of these records have been published and sold, some of them are about to be introduced in the market. And this has been made with free software and with the help of the whole community. Unfortunately one of my colleagues proved to be unfair with the rest of the team (and accidentally was the only Windows user in the studio ;)) and this created bad vibes at Kubi. So i decided to move with the rest of the guys to another place which is under construction at the moment but will be ready soon. So the skin changes but the core stays the same. As soon as the new studio will be ready i'll be glad to share with you some pictures and tech details. Thank you very much and take care. -- Giorgio Baù Sound engineer

13 years, 9 months

a lot of xruns after upgrading from ubuntu 8.04 to 10.04

by Lilli Chiffon

Hello the list To start 2011 i decided to upgrade from 8.04 to 10.04. And now i have a lot of xruns even i'm using the same setup as before. I tried under fluxbox, only ario + mpd, still xruns. - My kernel is 2.6.31-11-rt - My jack setup is : /usr/bin/jackd -v -P89 -dalsa -dhw:0 -r44100 -p1024 -n2 -m -H and i already got a high latency (around 50 ms) - My soundcard is a m-audio delta series (a pci card) I normally setup the limit.conf good (in fact i changed nothing) Anybody got a clue or an idea about how to solve this annoying situation. Best regards YaN

13 years, 9 months

Rendering multiple midi files for mixing

by S. Massy

All right, Here's another installment in the never-ending questions series. I have tracks sequenced in individual midi files meant to be rendered using various softsynths/patches. The idea is to: 1. Send the midi data to the synth using pmidi or midish. 2. Record the output from the jack ports to disk. 3. Repeat 1 and 2 for each track. 4. Import the tracks and mix them, possibly recording live material on top of it. Of these, step 2 is the tricky part. Recording the output is easy enough with ecasound or even jackrec, but the problem is that there is a gap of silence between the time recording is started and the time the synth starts playing, thus making syncing the tracks a very tedious job. Is there a simple way of recording only when audio data is coming out of the jack ports? I hope I'm being clear enough. Cheers, S.M.

13 years, 9 months

Card advice: M-aud. Fasttrack vs. Rol. UA25EX vs. ?

by S. Massy

Hi all, I'm in the market for a USB audio interface and I thought I'd come to the well for advice. Right now, the main two contenders in the race, because they're available at my local music shop, are M-Audio Fasttrack Pro and Roland/Edirol/cakewalk (they keep rebranding it, I think) UA25EX. Because I've seen them come up on this list, I know they work fairly well with Linux, but I was wondering which you would recommend, or if there is another major contender I should know about. My needs: - Works near flawlessly with Linux! - 2 channels in / Stereo out - reliable 24bit/48khz with "decent" preamps/converters - Integrated Midi would be nice, but isn't absolutely necessary - Phantom power on at least one input. - $150-250 price range The UA25EX is slightly more expensive than the M-audio, is it worth it? Also, until recently, the Tascam US122L was in the race, but I found out that the "MkII" is no longer class-compliant: can someone confirm this? All advice welcome. Thanks, S.M.

13 years, 9 months

Re: [LAU] Sine Wave Generator

by Kjetil S. Matheussen

Andrew Bryant: > > Hi all, > > I have been looking for a simple audio sine-wave generator that > interfaces with Jack. > > Minimum requirement is that it generates 1KHz tone, with level > predictably controlled from digital peak down to, say -60dB. > > The nearest I've come to it yet is ecasound -i tone, driving a mixer. > This doesn't, however, give the confidence I need in the output level. > > Any suggestions? > Start the snd-ls sound editor[1] and paste the following code into the terminal: (<rt-out> (oscil :freq 1000)) Set volume: (<rt-out> (* 0.01 (oscil :freq 1000))) [1] http://www.notam02.no/arkiv/src/snd/

13 years, 9 months

Re: [LAU] [64studio-users] [Development enquiry] 64 Studio 4.0

by guerrier

On Tue, Feb 1, 2011 at 4:15 AM, Daniel James <daniel(a)64studio.com> wrote: > > Hi Harry, > > > I heard from a little birdie that there was speak of 64 Studio 3 being > > released end January... > > Actually it will be 4.0, because we released some Ubuntu based distros > in the 3.x series already. 4.0 is based on Debian Squeeze. Hooray. Long live 64Studio 4.0, based on Debian Squeeze!

13 years, 9 months

Sine Wave Generator

by Andrew Bryant

Hi all, I have been looking for a simple audio sine-wave generator that interfaces with Jack. Minimum requirement is that it generates 1KHz tone, with level predictably controlled from digital peak down to, say -60dB. The nearest I've come to it yet is ecasound -i tone, driving a mixer. This doesn't, however, give the confidence I need in the output level. Any suggestions? Andrew.

13 years, 9 months

Jack problem?

by Gabbe Nord

Hello guys! I'm trying out the pianoteq-trail, which is awesome! But I get pretty bad performance, and when I start the app I get this error-msg: Midi thread could not acquire real-time scheduling, error 1 -- Operation not permitted Midi thread could not acquire real-time scheduling, error 1 -- Operation not permitted Midi thread could not acquire real-time scheduling, error 1 -- Operation not permitted Jack error: Cannot use real-time scheduling (RR/5)(1: Operation not permitted) Jack error: AcquireRealTime error Multi-core: could not acquire real-time scheduling, error 1 -- Operation not permitted Do you guys have any idea what the problem might be? Googling it has given me nothing so far! I have both my username and the groupname "audio" setup properly in limits.conf (rtprio, nice and so on) via a tutorial I found a while back. I'm using ubuntu studio 10.04 but with the latest 2.6.38-1-generic kernel. Best regards!

13 years, 9 months

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Linux-audio-user February 2011