Subject: Re: [ecasound] trouble panning with -epp
From: CLOTILDE Guy Daniel (guy.clotilde_AT_wanadoo.fr)
Date: Mon Oct 22 2001 - 20:08:34 EEST
Hi
unless I make a big mistake, the solution is like this:
----cut-------
-f:16,1,44100
-a:1 -epp:0 -ea:500 -i:sax1.wav -ea:500 -erc:1,2 -epp:0
-a:2 -epp:50 -ea:500 -i:trumpet1.wav -ea:500 -erc:1,2 -epp:50
-a:3 -epp:100 -ea:500 -i:trombone1.wav -ea:500 -erc:1,2 -epp:100
-a:all -f:16,2,44100 -o:alsa,default
----cut-------
because you have mono files (so ecasound knows it through -f:16,1,44100).
erc:1,2 transform the mono to stereo (copying channel 1 to channel 2)
and the output is back in stereo with -f:16,2,44100.
Just check if it is really 'erc' . I'm quite sure, but...
On Mon, 22 Oct 2001 12:02:52 -0400 (EDT)
Bill Allen <ballen_AT_mail.serve.com> wrote:
> I've got 3 single channel tracks that I want to pan across the left to
> right sound field. I'm using the following ecs script:
>
> ------cut here -------
> -a:1 -epp:0 -ea:500 -i:sax1.wav
> -a:2 -epp:50 -ea:500 -i:trumpet1.wav
> -a:3 -epp:100 -ea:500 -i:trombone1.wav
>
> -a:all -o:alsa,default
>
> ----- end cut --------
>
> The output from ecasound looks like I would expect it to:
>
> ****************************************************************************
> * ecasound v2.0.3 (C) 1997-2001 Kai Vehmanen
> *
> ****************************************************************************
> (eca-session) Interactive mode enabled.
> - [ Chainsetup/Adding chain operator "Normal pan" ]
> ------------------------
> Setting parameters: right-% = 0.00
> - [ Chainsetup/Adding chain operator "Amplify" ]
> ---------------------------
> Setting parameters: amp-% = 500.00
> - [ Chainsetup/Adding chain operator "Normal pan" ]
> ------------------------
> Setting parameters: right-% = 50.00
> - [ Chainsetup/Adding chain operator "Amplify" ]
> ---------------------------
> Setting parameters: amp-% = 500.00
> - [ Chainsetup/Adding chain operator "Normal pan" ]
> ------------------------
> Setting parameters: right-% = 100.00
> - [ Chainsetup/Adding chain operator "Amplify" ]
> ---------------------------
> Setting parameters: amp-% = 500.00
> - [ Chainsetup/Enabling audio inputs ]
> -------------------------------------
> (eca-audio-objects) Audio object "sax1.wav", mode "read".
> (audio-io) Format: s16_le, channels 1, srate 44100, interleaved.
> (eca-audio-objects) Audio object "trumpet1.wav", mode "read".
> (audio-io) Format: s16_le, channels 1, srate 44100, interleaved.
> (eca-audio-objects) Audio object "trombone1.wav", mode "read".
> (audio-io) Format: s16_le, channels 1, srate 44100, interleaved.
> - [ Chainsetup/Enabling audio outputs ]
> ------------------------------------
> (eca-audio-objects) Audio object "alsa", mode "write".
> (audio-io) Format: s16_le, channels 2, srate 44100, interleaved.
>
>
> But, the only instruments I hear come from the left while on the right I
> hear what sounds like a 20 hz static buzz. I tried making the -epp:50 for
> all channels with the same result. If I leave off the -epp, then I have
> sound on the left channel output, but nothing on the right, but no static.
> Each of the inputs sounds fine themselves, and two channel inputs that
> were created by other means sound fine.
>
> I get the same result if my output is a file instead of alsa,default.
>
> Any idea what I might be doing wrong?
>
> Bill
>
>
> --
> To unsubscribe send message 'unsubscribe' in the body of the
> message to <ecasound-list-request_AT_wakkanet.fi>.
-- To unsubscribe send message 'unsubscribe' in the body of the message to <ecasound-list-request_AT_wakkanet.fi>.
This archive was generated by hypermail 2b28 : Mon Oct 22 2001 - 20:00:50 EEST