Subject: Re: [ecasound] s32_le in ecasound
From: Bill Kenworthy (billk@iinet.net.au)
Date: Tue Jul 17 2001 - 01:37:03 EEST
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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