Re: [Alsa-user] [new babe questions] alsa based data acquisition system

2010-11-29 Thread J. Pauli
Thanks Unruh. superb explanation. Now I started to analyse things with specification. I shall update regarding this and share my experience. Hi, with certain restrictions it is possible to do what you are asking because an analog soundcard is just a bunch of DACs and ADCs. Depending on the

Re: [Alsa-user] [new babe questions] alsa based data acquisition system

2010-11-29 Thread J. Pauli
Agreed, that with expensive cards you can get up to frequencies of 40 to 80KHz. They all have hard falloffs to prevent aliasing however. I do not know where they put that falloff even for the expensice cards. In may ways it is silly to put the falloff much above 20KHz since the ear ( which is

Re: [Alsa-user] vu-meter in text mode

2010-03-12 Thread J. Pauli
I'm looking for either an app, or some way to verify the sound volumes of current sound output, from the console. I have a couple of machines, where I have only remote access through ssh, no X and one is streaming A/V to the other, and I need a way to verify, that at least ALSA is

Re: [Alsa-user] association between MIDI client:port and device

2010-03-03 Thread J. Pauli
Am Montag 01 März 2010 16:19:58 schrieb J. Pauli: Hi! The commands amidi -l and aplaymidi -l report a list of raw MIDI ports and a list of client:port pairs, respectively. Is there any tool to find out the association between these (i.e., find out the client:port pair

Re: [Alsa-user] association between MIDI client:port and device

2010-03-01 Thread J. Pauli
Hi! The commands amidi -l and aplaymidi -l report a list of raw MIDI ports and a list of client:port pairs, respectively. Is there any tool to find out the association between these (i.e., find out the client:port pair for a given raw MIDI port and vice versa)? Matching

Re: [Alsa-user] Redirecting alsa stream over network?

2009-03-07 Thread J. Pauli
Tomas Gustavsson wrote: Hi! First I want to apologise for my failing grammatic knowledge of the English language and for my lacking understanding of ALSA. I wondered if it was possible to take a steam from a single application and stream it over the network in some sort of way? This may

Re: [Alsa-user] mixing signals

2009-01-29 Thread J. Pauli
Daniel wrote: Please, I'm developing an application that receives many independent audio streams from networks to be played simultaneously (voice-conferencing). There is one thread for each network connection that provides the audio samples. The trouble here is that since all the

Re: [Alsa-user] How can you programmatically tell that audio is playing?

2008-12-24 Thread J. Pauli
Christian Brink wrote: How can you programmatically tell that audio is playing or at least being sent to the soundcard? I've got an application that occasionally fails to pick up a remote stream, but the process hangs around so I can't tell that it failed just by checking the process

Re: [Alsa-user] Recording a playback stream

2007-08-11 Thread J. Pauli
If you can write to a file then it should be possible to write to a FIFO (man 7 fifo). Just create a FIFO with mkfifo /tmp/whatever, adjust your asoundrc to write to that file, start something like lame -b 128 - somefile.mp3 in a terminal and then start skype (in that order). The result should be

Re: [Alsa-user] asoundrc, ladspa and biamplification

2006-11-19 Thread J. Pauli
Hi Frédéric, I tried exactly the same some time ago. Unfortunately the outcome was the same: no sound on both amps. My guess was, that the front and rear output thingy mute each other when they got initialized, that is one could use either of them but not both. I don't know for sure but the only