Linux-audio-user February 2009

linux-audio-user@lists.linuxaudio.org

144 participants
115 discussions

by Grammostola Rosea

Hi, I want to record a saxophone. Any suggestions? My equipment: maudio audiophile maudio dmp3 preamp shure 58a beta saxophone Linux... \r

16 years, 1 month

Ok, dumb question..

by alex stone

This might be a dumb question to devs, but from a user's perspective, what's Vamp, and what does it do? Alex. -- Parchment Studios (It started as a joke...)

16 years, 1 month

Debian 5

by alex stone

A quick heads up for those who may be interested. After my G4 laptop (museum piece) had a large cough and required brain surgery, i needed to install a new OS, so i'd thought i'd give Debian 5 (Lenny) PPC a try. Works a treat, 'out of the box', so to speak. No PPC RT kernel but sound, vid, etc, all installed and ran without any tweaks or workarounds. The new LXDE Desktop Environment is rather special, particularly for my old laptop, and its meagre 512mb ram, and quite a bit more responsive than heavier offerings. (I ran both Kubuntu, and Ubuntu on the LT before this using KDE and Gnome respectively) The kernel is 2.6.26-1, and midi works fine. I'd be interested to know if Debian 5 works well on 32 or 64 bit PCs, and if there's an RT option. The only apps that won't install are Denemo, and Musescore, at the moment. (Denemo can't find my fluidsynth or Sndfile libs which is no doubt user error, and Musescore keeps giving me a T1 key error/RTC timer error, and won't play at all, but it's been doing that on my Linux PPC for a while.) Thumbs up to the Debian team. Based only on my brief personal observation, i reckon they've done well. "Out of the box." Alex. Parchment Studios (It started as a joke...)

16 years, 1 month

Updating without cvs or svn

by alex stone

A quick question. I'm on the road at the moment, and i've had to deal with a broken laptop. (Which is now fixed, and i'm typing this on a colleague's computer.) My problem is i have no net access for the laptop, so i'm reinstalling everything with a constant transfer process with an install disk, and a usb stick. (And i should say here i've installed Debian Lenny ppc, which worked out of the box with no problems. Thanks to the debian team!) My colleagues computer is Windows, so i don't want to install anything on it, for fear of messing it up, or introducing, however unwittingly a virus, or bug of some sort. Is it possible to simply download (Save as..., for instance) from an up to date cvs or svn build, to an isolated download file, then transfer the files to my usb stick, without using CVS or SVN to do so? I've got most things re-installed, but a couple of apps, and updates that have been highly useful for me, are only available at the moment through CVS, SVN, or Git. Alex. -- Parchment Studios (It started as a joke...)

16 years, 1 month

MusE problems

by pete shorthose

Hi MusE is the center of my setup but unfortunately the current ubuntu binary refuses to load any of my old *.meds, prefering to crash instead (0.8.1). I decided to try and build a newer MusE from source but I've had no luck there either. uic from qt3 just segfaults when used. ie: /usr/share/qt3/bin/uic -L ../../muse/widgets -o organguibase.cpp -impl organguibase.h organguibase.ui make[5]: *** [organguibase.lo] Segmentation fault I've tried v0.9 and 1.0rc1 to the same effect. a backtrace reveals little (to me): #0 0xb7d6e48c in QMutex::lock () from /usr/share/qt3/lib/libqt-mt.so.3 #1 0xb5fdfda0 in QAbstractFileEngineHandler::QAbstractFileEngineHandler () from /usr/lib/libQtCore.so.4 #2 0xb600acb7 in ?? () from /usr/lib/libQtCore.so.4 #3 0xb600ad67 in ?? () from /usr/lib/libQtCore.so.4 #4 0xb60b0ffd in ?? () from /usr/lib/libQtCore.so.4 #5 0xb5f58498 in _init () from /usr/lib/libQtCore.so.4 #6 0xb7f59ae4 in ?? () from /lib/ld-linux.so.2 #7 0xb7f59c14 in ?? () from /lib/ld-linux.so.2 #8 0xb7f5db3b in ?? () from /lib/ld-linux.so.2 #9 0xb7f59716 in ?? () from /lib/ld-linux.so.2 #10 0xb7f5d2ee in ?? () from /lib/ld-linux.so.2 #11 0xb7599bec in ?? () from /lib/tls/i686/cmov/libdl.so.2 #12 0xb7f59716 in ?? () from /lib/ld-linux.so.2 #13 0xb759a01c in ?? () from /lib/tls/i686/cmov/libdl.so.2 #14 0xb7599b21 in dlopen () from /lib/tls/i686/cmov/libdl.so.2 #15 0xb7d6fb05 in QLibraryPrivate::loadLibrary () from /usr/share/qt3/lib/libqt-mt.so.3 #16 0xb7d94a5e in QLibrary::load () from /usr/share/qt3/lib/libqt-mt.so.3 #17 0xb7d75638 in QComLibrary::createInstanceInternal () from /usr/share/qt3/lib/libqt-mt.so.3 #18 0xb7d75d38 in QComLibrary::queryInterface () from /usr/share/qt3/lib/libqt-mt.so.3 some kind of thread sync error maybe. Has anyone managed to build MusE on intrepid? pete.

16 years, 1 month

Tascam US-1641

by Jan Depner

I checked on the archives and the ALSA site and couldn't find anything on this. Does the Tascam US-1641 run under Linux/ALSA? It looks like a good deal for the money. Jan -- Jan 'Evil Twin' Depner http://www.thecfband.com "Microsoft has a new version out, Windows XP, which according to everybody is the 'most reliable Windows ever.' To me, this is like saying that asparagus is 'the most articulate vegetable ever.'" Dave Barry

16 years, 1 month

Timers [Was Re: Awkward intermittent bug]

by David Hugh-Jones

So I've been doing some more testing and I think this must be a timer issue. The logic is that when I record my voice, the timing looks strange - a 10 second recording will be shown as 5 seconds (and played back that way). Can anyone point me towards a good explanation of ALSA timers and how to configure them? I have been looking around but can't find one. 2009/2/19 David Hugh-Jones <davidhughjones(a)gmail.com>: > Hello all > > I've been trying to fix this for months on and off and have had no > luck. I'm afraid it's Skype-related, but I hope there is some general > interest. > > My problem is that usually, when I record from my USB webcam > microphone (a creative Live! USB cam), the pitch is shifted upwards so > I sound like on helium. > > But, sometimes, this doesn't happen. I can't identify the difference. > > Can anyone suggest what I should be looking for? I tried grepping > /sys/snd*/parameters and comparing them for when the mike works and > when it doesn't; they are identical. > > My kernel is 2.6.17-12; Alsa version 1.0.17; a generic Ubuntu Intrepid > setup, using PulseAudio. > > Cheers > David >

16 years, 1 month

OT interference / grounding problems

by pete shorthose

Hi This isn't specifically linux related but maybe I can catch a break. Having recently upgraded some of my gear I've been trying to put the pieces together in order to do some serious audio work. In the process I've noticed some strange (to me) interference problems. As a guitar/bass player, I'm familiar with the kinds of noise you get from proximity to electronic equipment but I don't recall ever hearing snaps and pops and crackling sounds when I touch metal components (the mixer case for example) or the strings. If I put my feet on the floor, the effect is intensified too. I've also noticed that if I connect an RCA cable to my amp input but don't connect the other end, I hear a very loud buzzing sound. Louder than anything recall hearing previously. I've tried using things individually and together but I still have the problem. Does anyone know of an online resource useful for resolving this kind of problem or even some practical suggestions? At the moment the most I can think to do is to move it all to another location to potentially rule out some local weirdness with the mains electricity. (it's a fairly old house with a seemingly deranged circuit setup) It may just be that it took the introduction of better quality gear for me to hear the effects above the usual din but then these static like snapping noises are very distinct. cheers, pete.

16 years, 1 month

No sound from Presonus FP10

by Jesse Zola

Hi. I'm in the process of setting up a 64 bit Archlinux system and I'm stumped by a problem with playback on my FP10. * I can start jackd. * The light on the FP10 turns blue. * In qjackctl I can see programs (mplayer, ardour, etc.) making connections to the default output pair. * I can record in ardour and hear analog inputs being played back through the monitors. Everything seems perfect aside from not beight able to get any sound from the PC ;-( Has anyone else experienced this kind of thing? Have I missed something obvious? I would really appreciate some help at this point. FFADO version is 1.999.41-1518 jack is jackdmp 1.90 Regards, Jesse

16 years, 1 month

Current favourites for new hardware?

by Gordon J. C. Pearce MM3YEQ

What are the current recommendations and "avoids" in motherboards and graphics cards these days? I'm currently using a Sempron 3400 with a completely shite Via motherboard (slow, buggy onboard sound, slow, buggy onboard network, pathetically slow onboard video since my NVidia card failed). Are there any particular chipsets to go for? Gordon

16 years, 1 month

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Linux-audio-user February 2009