[Linrad] Re: ALSA/4Front, Linrad-02.45a

["Ermanno F\." <libero.it; ik7ezn@xxxxxxxxxxxxxxxx>]

Hello Pierre.
Thanks for the information on plugin-alsa and excuse for inaccuracies, my language English hi.....
With other software Jack works in Ubuntu but i have not had success with Linrad.
I believe that too will wait a few days to try the new rel. Ubuntu 8.04.

Thanks

Ermanno / ik7ezn


---------- Initial Header -----------

From      : linrad@xxxxxxxxxxxxxxxx
To          : linrad@xxxxxxxxxxxxxxxx
Cc          : 
Date      : Sat, 19 Apr 2008 21:35:19 +0200
Subject : [Linrad] Re: ALSA/4Front, Linrad-02.45a







> 
> Hi Ermanno,
> 
> On Sat, 2008-04-19 at 17:13 +0200, Ermanno F. wrote:
> > Hello 
> > I am trying the rel. 02.45 with Alsa.
> > I have verified that it works with the vers. 1.0.14a of Alsa and not with 1.0.13 (default in Ubuntu 7.04).
> > I am trying to send the output of Linrad as input to other applications.
> > Alsa is taken as the default output card Delta44 and I can not use it as input while Jack-audio runs.
> > Someone knows how to change the default output-sound card that uses Alsa?
> 
> Not sure I fully understand the problem.
> Anyway maybe these guidelines could help you to solve your problem:
> 1.First step:  If you have multiple soundcards, the order of the cards
> is sometimes changed by ALSA at boot time.
> With  Ubuntu 7.10 this can be avoided by appending something like this
> in /etc/modprobe.d/alsa-base in order to pin down the index of the
> soundcards:
> 
> options snd-ice1712 index=1
> options snd-hda-intel index=0
> 
> 2. Second step: In order to make p.e. soundcard 0 your default
> soundcard, you can create or modify an .asoundrc file with 
> gedit ~/.asoundrc and paste following statements:
> 
> pcm.!default {
> type hw
> card 0
> }
> ctl.!default {
> type hw 
> card 0
> }
> 
> > Someone managed to grab the output of Linrad other programs (trying with Jack audio) ?
> 
> I started experimenting with an alsa plugin in Linrad in order to use
> jack but without success.
> The reason is that in the standard version of ubuntu 7.10 the jack
> plugin is broken ( for almost one year now ;-) 
> See:
> https://bugs.launchpad.net/ubuntu/+source/alsa-lib/+bug/148510
> I'll wait until Ubuntu Hardy comes out (april 24 ?) before I  resume
> further experiments with jack
> 
> On the other hand I succeeded to route the output of Linrad to
> Pulseaudio.
> Pulseaudio will be the soundserver of Ubuntu 8.04 and has the capability
> to accept sound input from one or more sources (processes or capture
> devices) and redirecting it to one or more sinks (sound cards, remote
> network PulseAudio servers, or other processes).
> In other words , with Pulseaudio one should be able to implement a
> Virtual Audio Cable to feed other applications with the output of
> Linrad.
> 
> This is what I've done so far:
> 
> 1. Setup of Pulseaudio in Ubuntu 7.10 as described in:
> https://wiki.ubuntu.com/PulseAudio
> 
> 2. Modify Linrad-02.45 in order to use an alsa plugin for the output
> stream:
> 
> In lsetad.c line 1404:
> //      sprintf(sndout_plughw_pcm_name,"%s",
> alsa_dev_plughw_pcm_name);  //multithreading !!
>       sprintf(sndout_plughw_pcm_name,"%s", "default");  //test
> pulseaudio
>       if ((err = snd_pcm_open(&da_handle, sndout_plughw_pcm_name, 
>                                             SND_PCM_STREAM_PLAYBACK, 0))
> < 0) 
> 
> In lsetad.c line 1469:
> //    sprintf(sndout_plughw_pcm_name,"%s",
> alsa_dev_plughw_pcm_name);  //multithreading !!
>       sprintf(sndout_plughw_pcm_name,"%s", "default");  //test
> pulseaudio
>     if ((err = snd_pcm_open(&da_handle, sndout_plughw_pcm_name, 
>                                            SND_PCM_STREAM_PLAYBACK, 0))
> < 0) 
> 
> 
> Note: In this case you must remove the ./asoundrc file described in
> point 2 above to make it work
> 
> Once the output of linrad is captured by Pulseaudfio it should be
> possible to make it available to other applications ( on the network )
> However, being completely new with Pulseaudio I still haven't figured
> out how it should be done.
> 
> Maybe other knowledge linrad users with Pulseaudio experience could give
> us some guidance on that subject.
> 
> 
> 73
> 
> Pierre /ON5GN
> 
> 
> 
> 
> > 
> 


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