--- Forwarded Message from Bob Majors <[log in to unmask]> ---

>User-Agent: Microsoft-Entourage/10.1.4.030702.0
>Date: Mon, 13 Dec 2004 08:55:54 -0800
>Subject: Re: #7743.1 new beta version of dl recorder (!)
>From: Bob Majors <[log in to unmask]>
>To: Language Learning and Technology International Information    Forum
<[log in to unmask]>
>In-Reply-To: <[log in to unmask]>

A sidebar about file size and the .WAV audio file format.  While it is
understood that the reference (of .WAV files taking up a lot of space) is
due to the .WAV format being commonly implemented (or defaults set to) 44.1
kHz., 16 bit, uncompressed PCM, which results in *much* larger files than,
say using .mp3 compression -- .WAV files *can* be implemented at lower
sampling rates and bit depths (resolution), e.g., 11.025kHz., 8 bit; and
.WAV files can also be compressed using ADPCM, where the file size reduction
is 4:1.  Of course these methods don't yield nearly the file size reduction
as .mp3 encoding (and sound quality is yet another topic).

Bob Majors
Language Learning Center
University of Washington



m***********************************************
 LLTI is a service of IALLT, the International Association for
Language Learning, and The Consortium for Language Teaching and
Learning (http://consortium.dartmouth.edu).
Join IALLT at http://iallt.org.
Otmar Foelsche, LLTI-Editor ([log in to unmask])
***********************************************