Subject: Re: [ecasound] Ecasound qt projects
From: S. Massy (theanaloguekid_AT_tak.net.dhis.org)
Date: Sun Oct 07 2001 - 20:30:28 EEST
On Sun, 07 Oct 2001, Tony Leake <tony_leake_AT_hotmail.com> wrote:
>
> >What do you mean by random interference - problems with audio quality or
> >possibly something else...?
>
> By experimenting with interactive mode I have discovered what is causing the
>
> problem.
>
> I start in interactive mode and delete the default chainsetup.
>
> I then add my own chainsetup, add 1 chain with a wav file as input and
> /dev/dsp as output then start. All is ok so far.
>
> Now if i disconnect and remove the chainsetup, then add a new one, again
> with 1 chain, a wav for input and /dev/dsp for output. This time I get a
> nasty buzzing in the right speaker as it plays.
>
> Could it be that I'm nit allowed to delete and add chainsetups in this way
> in interactivemode and eci or am I doing something wrong?
You're connecting a mono input while opening the output device as stereo,
I'm guessing that ecasound doesn't tidy itself up after the first playback
thus creating the garbage that you get to hear on the second playback; that
could be a bug, I suppose.
On the other hand, try issuing:
cs-set-audio-format 16,1,22050
at the beginning of your session, then /dev/dsp will be opened as mono,
this should avoid this unpleasant effect.
>
> I have pasted a transcript of the interactive session below.
>
> Regards
> Tony
>
>
> ecasound -c
> ****************************************************************************
> * ecasound v2.0.2 (C) 1997-2001 Kai Vehmanen *
> ****************************************************************************
> (eca-session) Interactive mode enabled.
> ecasound ('h' for help)> cs-list
> command-line-setup
> ecasound ('h' for help)> cs-select command-line-setup
> (eca-controller) Selected chainsetup: "command-line-setup".
> ecasound ('h' for help)> cs-remove
> (eca-controller) Removing chainsetup: "command-line-setup".
> ecasound ('h' for help)> cs-list
> ecasound ('h' for help)> cs-add test
> (eca-controller) Selected chainsetup: "test".
> (eca-controller) Added a new chainsetup with name "test".
> ecasound ('h' for help)> c-add ch1
> (eca-controller) Added chains: ch1.
> ecasound ('h' for help)> c-select ch1
> ecasound ('h' for help)> -i:guitar.wav
> ecasound ('h' for help)> -o:/dev/dsp
> ecasound ('h' for help)> cs-connect
> - [ Chainsetup/Enabling audio inputs ] -------------------------------------
> (eca-audio-objects) Audio object "guitar.wav", mode "read".
> (audio-io) Format: u8, channels 1, srate 22050, interleaved.
> - [ Chainsetup/Enabling audio outputs ] ------------------------------------
> (eca-audio-objects) Audio object "/dev/dsp", mode "write".
> (audio-io) Format: s16_le, channels 2, srate 44100, interleaved.
> (eca-controller) Connected chainsetup: "test".
> ecasound ('h' for help)> start
> - [ Controller/Processing started ] ----------------------------------------
> ecasound ('h' for help)> - [ Engine/Init - mixmode "simple" ]
> ---------------------------------------
> c-select ch1
> ecasound ('h' for help)> c-remove
> - [ Engine/Exiting ] -------------------------------------------------------
> (eca-controller) Disconnecting chainsetup: "test".
> (eca-controlled) Removed selected chains.
> (eca-control) ERROR: Can't reconnect chainsetup.
> ecasound ('h' for help)> c-list
> ecasound ('h' for help)> cs-select test
> (eca-controller) Selected chainsetup: "test".
> ecasound ('h' for help)> cs-remove
> (eca-controller) Removing chainsetup: "test".
> ecasound ('h' for help)> cs-list
> ecasound ('h' for help)> cs-add test2
> (eca-controller) Selected chainsetup: "test2".
> (eca-controller) Added a new chainsetup with name "test2".
> ecasound ('h' for help)> c-add ch2
> (eca-controller) Added chains: ch2.
> ecasound ('h' for help)> c-select ch2
> ecasound ('h' for help)> -i:guitar2.wav
> ecasound ('h' for help)> -o:/dev/dsp
> ecasound ('h' for help)> cs-connect
> - [ Chainsetup/Enabling audio inputs ] -------------------------------------
> (eca-audio-objects) Audio object "guitar2.wav", mode "read".
> (audio-io) Format: u8, channels 1, srate 22050, interleaved.
> - [ Chainsetup/Enabling audio outputs ] ------------------------------------
> (eca-audio-objects) Audio object "/dev/dsp", mode "write".
> (audio-io) Format: s16_le, channels 2, srate 44100, interleaved.
> (eca-controller) Connected chainsetup: "test2".
> ecasound ('h' for help)> start
> - [ Controller/Processing started ] ----------------------------------------
> ecasound ('h' for help)> - [ Engine/Init - mixmode "simple" ]
> ---------------------------------------
>
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