[ecasound] trouble panning with -epp

Subject: [ecasound] trouble panning with -epp
From: Bill Allen (ballen_AT_mail.serve.com)
Date: Mon Oct 22 2001 - 19:02:52 EEST

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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

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• Next message: Burkhard Ritter: "Re: [ecasound] EWF rocks, and, where to get drum loops?"
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