Subject: Re: [ecasound] Re: [linux-audio-dev] LADSPA vocoder plugin (fwd)
From: S. Massy (theanaloguekid@tak.net.dhis.org)
Date: Wed Jun 20 2001 - 03:31:41 EEST
On Tue, 19 Jun 2001, Josh Green <jgreen@users.sourceforge.net> wrote:
> 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 :)
Yes, the clicking thing is very annoying, though it's nothing
compared to what it was in the past. I have a setup very similar to
yours, sound-wise at least, and I experience these sudden irruptions
of static (sounds like an old AM radio to me.); the most frustrating
is that it seems to happen very randomly, so it's hard to
trace. However it seems to happen much more quickly with your vocoder
plugin on (takes only a few minutes for me.). Have you tried running
ecasound with the "-r" and "-z:nointbuf" options? They are mandatory
for me. Also, are you using ALSA devices or OSS emulation? I
experienced no segfault at all though. BTW, that vocoder is quite
amazing.
Regards,
S. Massy
> 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
> --
> To unsubscribe send message 'unsubscribe' in the body of the
> message to <ecasound-list-request@wakkanet.fi>.
>
-- To unsubscribe send message 'unsubscribe' in the body of the message to <ecasound-list-request@wakkanet.fi>.
This archive was generated by hypermail 2b28 : Wed Jun 20 2001 - 03:30:00 EEST