Format of .AU Sound files

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3 total messages Started by christos Thu, 31 Dec 1992 02:18

#1908

Author: christos
Date: Thu, 31 Dec 1992 02:18

17 lines
1117 bytes

Hello there,

	I am using the Public Domain program Sound Tools on the Sun station to record
speech. The speech samples are saved in a mu-law 8bits/sample encoding rule with a 
standard ".au" header precceding the data. What I would like to know is what the 
format of the speech samples is? In other words, I am reading the bytes that 
correspond to 8-bit speech samples but I don't know whether they are in signed
binary format(2's complement) or unsigned binary format or anyother format. I have
tried both binary signed (2' complement) and unsigned but it doesn't work. Does
anybody know how the samples are stored?

	I would appreciate any relevant response.


Thanks,
Internet Address: rsl11@kuhub.cc.ukans.edu
Bitnet Address: rsl11@ukanvm.bitnet

Re: Format of .AU Sound files

#2159

Author: Jeff Correia
Date: Mon, 04 Jan 1993 18:12

23 lines
1537 bytes

In article <1992Dec30.201851.45991@kuhub.cc.ukans.edu>,
christos@kuhub.cc.ukans.edu writes:
> 
> Hello there,
> 
> 	I am using the Public Domain program Sound Tools on the Sun station to record
> speech. The speech samples are saved in a mu-law 8bits/sample encoding rule with a 
> standard ".au" header precceding the data. What I would like to know is what the 
> format of the speech samples is? In other words, I am reading the bytes that 
> correspond to 8-bit speech samples but I don't know whether they are in signed
> binary format(2's complement) or unsigned binary format or anyother format. I have
> tried both binary signed (2' complement) and unsigned but it doesn't work. Does
> anybody know how the samples are stored?
> 
> 	I would appreciate any relevant response.
> 
> 
Furthermore, in the sounds given in the /usr/demo/SOUND/sounds directory...
1.  At what sampling rate were these sounds sampled?
2.  Is there any header information in these files and if there is, what is
it's format?

Jeff

Re: Format of .AU Sound files

#2164

Author: David P. Kemp
Date: Tue, 05 Jan 1993 16:49

16 lines
1055 bytes

In article <1993Jan4.181259.27617@linus.mitre.org> m22257@mitre.org (Jeff Correia) writes:

>Furthermore, in the sounds given in the /usr/demo/SOUND/sounds directory...
>1.  At what sampling rate were these sounds sampled?
>2.  Is there any header information in these files and if there is, what is
>it's format?

Please do at least a *little* RTFM'ing before posting questions like
this.

HINT: look in /usr/demo/SOUND/man.
-- 
   Dave Kemp   dpkemp@afterlife.ncsc.mil 
-----------------------------------------------------------------------------
"Washington [D.C.] is a city of Southern efficiency and Northern charm"
     -- John F. Kennedy

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