[ecasound] Re: [linux-audio-dev] LADSPA vocoder plugin (fwd)

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Subject: [ecasound] Re: [linux-audio-dev] LADSPA vocoder plugin (fwd)
From: Josh Green (jgreen@users.sourceforge.net)
Date: Tue Jun 19 2001 - 23:58:26 EEST

That bit of ecasound looks rather interesting. I'll check it out.

Did you have any segfault problems? Or any problems with audio degrading
over about 15 minutes period of time (pops and clicks), I think I
mentioned that problem to you before. I haven't done a thorough test
yet, just thought maybe someone could verify if they are/aren't having
the same problems with ALSA 0.9.0beta4, SB Live and ecasound v2.0.1. I'm
not sure yet if the segfault is caused by my plugin or not :) I know the
audio degrading thing isn't the plugin though, as I removed it from the
chain (just full duplex ALSA input/output) with same results. Happy
vocoding :)
        Josh Green

Kai Vehmanen wrote:
> Ok, here's the vocoder. I had lots of fun with the following ecasound
> script:
> --cut--
> #!/bin/sh
> ecasound -c \
> -a:bus1 -f:16,1,44100 -i amen.ewf -eac:0,2 \
> -a:bus2 -f:16,1,44100 -i /dev/dsp -erm:2 -eac:0,1 \
> -a:bus1,bus2 -f:16,2,44100 -o loop,1 \
> -a:bus3 \
> -f:16,2,44100 -i loop,1 \
> -f:16,2,44100 -o /dev/dsp \
> -el:vocoder,6,0.7,1,1,1,1,0.8 -eac:0,2 -ea:1000
> --cut--
> Warning!!! Be careful with the volume levels. I had to add -ea:1000
> (yup, that's 1000% amplify) to hear the results, but
> this also produces _nasty_ blasts of noise when
> starting ecasound (something wrong with the loop dev code
> I think)
> 'amen.ewf' is the classsic amen drumloop (looping enabled in ewf) Now then
> just plug your guitar (or whatever you have connected to line in) and
> start controlling the drumloop. This is especially fun with a heavily
> distorted guitar sound... :)
> ---------- Forwarded message ----------
> Date: Mon, 18 Jun 2001 21:51:20 -0700
> From: Josh Green <jgreen@users.sourceforge.net>
> Reply-To: linux-audio-dev@music.columbia.edu
> To: linux-audio-dev@music.columbia.edu
> Subject: [linux-audio-dev] LADSPA vocoder plugin
> I have released version 0.1 of the LADSPA vocoder plugin I spoke of
> before. You can find it at:
> http://www.c0nfusion.org/~josh/
> The original program that was shamelessly ripped from can be found at:
> http://www.uni-karlsruhe.de/~uno4/linux/
> If you don't know what a vocoder is: its an effect commonly used to add
> a robotic effect to vocals. Settel's site (the original vocoder author)
> has a more in depth description.
> Its my first LADSPA plugin so let me know if you find any problems or
> have some better ideas about the design.
> Josh Green

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