Linux-audio-user February 2003

linux-audio-user@lists.linuxaudio.org

114 participants
130 discussions

[linux-audio-user] Alsa troubles? Why O why??

by moeflon

Hi everybody, Been on linux for about 1 year now. Realy super experience after my headache-period with M$. But I ran into troubles now... Reïnstalled my MDK 9.0 (different partition usage). At initial startup (before installing extra software) ALSA works fine, no troubles at all. After I installed the software, after a needed reboot, if I want to open my "alsamixergui" I get an error: no mixers found... No sound at all, even not running XMMS on OSS-out...I installed (almost) everything sound-related from mirrors I got from PLF. Did check soundcard settings, seems some program changed the driver for my SBlive to audigy.... (weird to me) Tried applying the old driver. It worked for the OSS, not for alsa, nor for esound... (yes esound doesn't allow any sound either) and yes, I suppose the mixers are not set to 0.. although I can't check that... Why o why does this happen?? Already noticed that turning off my Evolution-usb-keyboard during rebooting was needed, because of probs with alsactl during boot... Could anybody plz give me a clue howto solve this prob? And in addition to this, does anybody feel like expaining to me why (even on my previous setup) rosegarden doesn't produce any hearable sound? (yes the vu-meters move when I play an added track, but no sound is heard, and yes, jack is running (as root, right?) THX Karel alias 'Moeflon'

21 years, 1 month

Re: [linux-audio-user] Full Duplex woes

by Rick Taylor

John Bleichert <syborg(a)stny.rr.com> writes: > If you're using e.g. the kernel drivers from nVidia, you'll need to > download the source tarballs for them from nVidia's site. The drivers are > tied tightly to the kernel version, and must be rebuilt each time you > rebuild your kernel. > > Assuming the nvidia drivers, just keep the 2 source directories around > from the GLX and kernel drivers, and just jump in there and 'make install' > real quick each time you rebuild your kernel. No... I've got an old 3dfx Banshee... gl... the drivers have been working better than the ones it shipped with. For the time being, I've killed it though. I've spent too much time at that and not enough trying to glue snd and common music to scwm {with emacs, texemacs ...maybe lilypond or musictex, moho and guile in there as well.} I just set up a stock thing... {I found this nifty scheme-like animation language/system called al {one of the first links under animation at linuxlinks.com} . ...Considering the possibilities of scheme and common music... and... how much I like all of the above mentioned apps..It seems as though it will make the ideal system for me.} Thanks though. Anyone know of synths or sequencers that will tie into the above mess?

21 years, 1 month

Re: [linux-audio-user] Hot(un)plug - MD interface

by Frank Pirrone

Vincent, The USB interface came with my Sony MZ-R700 MiniDisk which also features a microphone input. It is the Xitel MD-Port DG2, and and connects through an optical TosLink (S/PDIF) to digitally transfer music files from computer to the MD. Nice little box, and fully supported under Linux just as my MidiSport 2x2 MIDI interface, and HP6200c scanner. Frank

21 years, 1 month

[linux-audio-user] Hot(un)plug

by Tim Hall

Hi I'm getting annoying messages on startup, I think from hotplug. This is because it can't find some usb port, which is not surprising as I have no external connections of that sort. The only way I can get rid of that is to kill khubd, which is clearly unsatisfactory. Can I uninstall hotplug entirely if I have no usb devices without losing other functionality? cheers tim hall

21 years, 1 month

[linux-audio-user] more skips with alsa then with oss

by Alex Polite

As I want to run Ardour I just moved from oss to alsa/jack. A funny thing I noticed is that just playing MP3s I get a lot more skips using alsa/jack/alsaplayer then I did using oss/xmms. Actually with OSS I had almost no skips. Is this normal or suspect? I thought that alsa was supposed to provide better latency then oss? I've followed these two documents: http://myweb.cableone.net/eviltwin69/ALSA_JACK_ARDOUR.html http://www.djcj.org/LAU/guide/Low_latency-Mini-HOWTO.php3 alex -- Alex Polite http://plusseven.com/gpg

21 years, 1 month

Re: [linux-audio-user] Need help - hardware recommendations

by linuxmedia4＠netscape.net

Paul Winkler <pw_lists(a)slinkp.com> wrote: >On Tue, Feb 25, 2003 at 01:34:57PM -0500, linuxmedia4(a)netscape.net wrote: >> ...they taught us in the recording classes... it's important to put >> the mics in a "cross pattern" (like an X). >well, sometimes... >> The heads of the mics need >> to be 45 degrees apart from each other. If you don't then you can get >> "phase cancellations". >I never went to recording classes, but ... >Phase cancellations have at least as much to do with mic position >as with mic angle. angling the mics is not a magic solution. >Most cardioid mics have plenty of pickup at 90 degrees. >It sounds like what you're describing is the classic "X/Y" stereo >mic technique, with a pair of cardioids placed so that >* The mics are angled 90 degrees relative to each other, and > 45 degrees relative to "center" >* The mic heads are placed as close together as possible. After reading several of the responces to my original email, I'm realizing that I may be confusing mic angling with preventing phase cancalations when the (mic angling) part of the class may have just been about micing techniques. And you make a good point. Different mics have different pick-up patterns. So even (if) angling does (in some cases) prevent phase cancellations, it's not going to if the mic has a wide pick-up pattern. At this point, I don't even remember if angling has _anything_ to do with preventing phase cancellations. >check the rec.audio.pro FAQ for more good info on stereo micing. Since it's been 15 years since I took the recording class, It may be time to brush up on recording tecniques again. >> ...If you don't do the cross pattern you (could) hear unwanted sounds >> (and/or dropouts). >dropouts?? what on earth does mic technique have to do with dropouts? I (thought) the teacher was saying that phase cancellations can also cause dropouts. But hey, 15-year-old information can get blurred with other info in the mind. I've been busy for the last 10 years Busking on the streets of the various Cities that I've traveled to. I haven't used any of the tecniques that I learned. So I'm sure I've either forgot certain details, or have blurred different discussions in my mind. Rocco __________________________________________________________________ The NEW Netscape 7.0 browser is now available. Upgrade now! http://channels.netscape.com/ns/browsers/download.jsp Get your own FREE, personal Netscape Mail account today at http://webmail.netscape.com/

21 years, 1 month

[linux-audio-user] [ANNOUNCE] polarbear-0.5.0

by Maarten de Boer

Hello, I just released polarbear. I had the code lying around, and just merged it with the jack/alsa i/o code of tapiir. Note that this is the first public release. I did not test it thoroughly, and I am not sure if the GUI is obvious enough (it should be if you are familiar with complex filters), so any input is welcome. polarbear is a tool for designing filters in the complex domain. Filters can be designed by placing any number of poles and zeros on the z plane. >From this the filter coefficients are calculated, and the filter can be applied in real time on an audio stream. polarbear can be found at http://www.iua.upf.es/~mdeboer/projects/polarbear/ For the (far) future, the idea is that polarbear and tapiir can work together, in the sense that the filter coefs calculated by polarbear can be used to control the gains of tapiir. maybe polarbear and tapiir might even merge. that would be some animal :-) Maarten

21 years, 1 month

[linux-audio-user] Full Duplex woes

by Chris

Hi everyone... This may sound like a stupid question to a bunch of pros like you... but... I am trying something simple. Soon, I will be building a system for home recording... but for now...something simple. Can anyone tell me how I might get my soundblaster live (emlu10k1) to duplex??? I have audacity installed, and krecord, neither will record anything! I hear my voice amplified throught he speakers, but I get nothing. I am using OSS drivers, both the ones from the 2.4.19 kernel source and the ones from sourceforge (most current). No dice. I tried the ALSA drivers... but that was severl "tries" ago.... I know this isn't hard.. but I can't find any help on this anywhere! Last time I tried this salvation lay in the "full duplex" setting on kde... but no dice this time... Thanks in advance.... Chris

21 years, 1 month

[linux-audio-user] Need help - hardware recommendations

by Bryan Koschmann - GKT

Hello, I'm a bit of a newbie (okay, REALLY newbie) when it comes to working with audio, but I am a strong linux user. Basically, I have the following: 2 - instrument microphone (XLR) 1 - vocal microphone (XLR) 1 - keyboard w/ midi interface I want to do some multitrack recording, using anywhere fmro 2-4 of the above items at once. I am getting ready to start building a dedicated box for this. So, what kind of hardware should I be looking at? I'm looking for something somewhat inexpensive (RME Hammerfall was about $600, Midiman delta 1010 LT was closer to $700, both too much). Also, should I be looking at any additional items like a mixing board, amplifiers and such? I would greatly appreciate any ideas, thoughts, hints, pointers, links! Thank you in advance, Bryan P.S. I know it seems like a lot for a "newbie", but I just like doing things right the first time.

21 years, 1 month

[linux-audio-user] Gear

by Jan "Evil Twin" Depner

Just FYI, American Musical Supply has a (1) dent and scratch ST-Audio C-Port DSP 2000 for $380 US. Usually $450 US. I wish that had been there when I bought mine. I'm really happy with it, works well with Ardour. Jan

21 years, 1 month

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Linux-audio-user February 2003