--- 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]) ***********************************************