Subject: Re: [ecasound] s32_le in ecasound
From: Jeremy Hall (jhall@uu.net)
Date: Tue Jul 17 2001 - 13:59:32 EEST
OH THAT'S HIDEOUS!
try using -erc to fix your stereo problems, I just looked in the
manpage. I don't see the etf effect as having more than 1 parameter, maybe
my ecasound.1 is out of date?
_J
In the new year, Bill Kenworthy wrote:
> You need to specify what format the input is in and then what the output
> is required to be for the conversion
>
> e.g., record as a 44100 mono stream, convert to fake stereo and mp3 it:
> ecasound -f:s16_le,2,22050 -i:rage.raw -etf:35,surround,20
> -f:s16_le,2,44100 -o:stdout|bladeenc -rawstereo stdin rage.mp3
>
> In this case, its recoreded at 44100, but when I need a stereo output, I
> had to halve the input rate. Experiment!!
>
> BillK
>
>
> On 16 Jul 2001 11:56:25 -0400, Jeremy Hall wrote:
> > hmm I think something isn't quite right.
> >
> > I typed:
> >
> > ecasound -i /tmp/in-peppy.raw -f:s32_le,26,44100,n -o alsahw,0 -r -c
> >
> > NOTE: this means input is interleaved, output is noninterleaved.
> >
> > Channel 1 plays something, although I am not certain it is correct, it at
> > least sounds right. Channel 2 is a hideous loud obnoxious noise! all other
> > channels are quiet.
> >
> > Next, in interactive mode, I typed -erc:1,3
> > nothing happened.
> > -erc:1,4
> > nothing happened
> > next I typed
> > cs-connect
> > t
> > now I got some heavily distorted noise generated from the studio. Since
> > this is near 115DB we tend to stay away from that room when playing with
> > ecasound. It is easy to hear the results from ANY sector of the house.
> >
> > so the problem is either in converting from interleaved to noninterleaved,
> > converting from 16bit to 32 bit, converting from two channels to 26
> > channels, or something else I haven't thought of.
> >
> > thoughts?
> >
> > You might be able to reproduce this without the hardware if you use files
> > not devices. NOTE: this is BEFORE any of the changes in the last 24 hours
> > have gone through.
> >
> > _J
> >
> > In the new year, Jeremy Hall wrote:
> > > hmm this is really wierd!
> > >
> > > I typed
> > >
> > > ecasound -f:s32_le,26,44100,n -i alsahw,0 -f:s16_le,2,44100 -o test.raw
> > > -erc:3,1 -erc:4,2 -r -b:64
> > >
> > > and the machine began making a humming noise that it usually does just
> > > after it had crashed. why does it play, PLAY a sound when it is told to
> > > capture?
> > >
> > > hmmph this computer is STRANGE!
> > >
> > > _J
> > >
> > > In the new year, Kai Vehmanen wrote:
> > > > On Sat, 14 Jul 2001, Jeremy Hall wrote:
> > > >
> > > > > I eed s32_le to be supported in ecasound. Can this be added?
> > > >
> > > > It's supported.
> > > >
> > > > > I'm trying to get hardware level of RME9652 working and the only data
> > > > > format it supports is s32_le. but trying to use it in ecasound results in
> > > > > segmentation fault. Is s32_le supported? the manpage doesn't seem to think
> > > > > so, and I am not quite sure how to add it. I'm trying to improve upon
> > > > > performance by avoiding the plug layer of alsa if possible.
> > > >
> > > > Hmm, from 2.0.1's man page (doc entry for -f):
> > > > --cut--
> > > > fied, host byte-order is used. Currently supported
> > > > formats are "u8" (same as "8"), "s16_le" (same as
> > > > "16"), "s16_be", "s24_le", "s24_be", "s32_le",
> > > > "s32_be", "f32_le" and "f32_be".
> > > > --cut--
> > > >
> > > > :) But of course, as I can't fully test these pro audio related features,
> > > > there might bugs. You should also try "s24_le". This is also a 32bit
> > > > data format, but the lower 8bits are always null. This is used at least in
> > > > a few higher end cards.
> > > >
> > > > But I'd be interested in strace and gdb traces.
> > > >
> > > > --
> > > > http://www.eca.cx
> > > > Audio software for Linux!
> > > >
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