GSM 06.10 MacGSM

MacGSM 1.0 950612

Drag and drop GSM sound file compressor/decompressor (.au.gsm to .au). It's fast! Accelerated for PowerMacintosh. Running native on both 68K and PPC . Hold down option key to compress. Default is decompress.

This is a quick port of the UNIX program GSM-1.0 Patchlevel 6 which compress audio (Sun .au sound file) down to 13 kbit/s, smaller than all the other audio format like mpeg audio or mu-law etc. The quality of the algorithm is good enough for reliable speaker recognition; even music often survives transcoding in recognizable form (given the bandwidth limitations of 8 kHz sampling rate).

I ported this to decompress RTHK news radio files (from http://www.cuhk.hk/rthk/ and its mirrors). This program will decompress a fubar.au.gsm file into fubar.au in the same folder.

System Requirements

System 7.5 or
System 7.0 and 7.1 with Thread Manager extension.

Special Thanks to:

Leonard Rosenthol, Marshall Clow, and Stephan Somogyi for DropShell 2.0. Ryan Davis for DropUNIX.
Steve Sisak for AEThreads.
GSM codec Copyright 1992, 1993, 1994 by Jutta Degener and Carsten Bormann, Technische Universitaet Berlin.

Freeware:

MacGSM is released as freeware. You are encouraged to make copies of MacGSM and distribute to anybody through electronic services or on disks, provided you also copy the associated documentation.

User Support

If you have any questions, suggestions or bug reports. Please contact me at the following e-mail addresses:

Internet:: paulcho@astral.magic.ca
Paul_C.H._Ho@magic.ca
CompuServe:: 74020,772

Copyright (c) 1995 Paul C.H. Ho and Pink Elephant Technologies. All rights reserved.
MacGSM is written in Metrowerks CodeWarrior Gold CW6
Portions Copyright (c) Metrowerks Inc.
Based on DropShell 2.0 by Leonard Rosenthol, Marshall Clow, and Stephan Somogyi.
Based on DropUNIX by Ryan Davis
Based on AEThreads by Steve Sisak
GSM codec Copyright 1992, 1993, 1994 by Jutta Degener and Carsten Bormann, Technische Universität Berlin.

Legal Stuff

MacGSM is released as is. No guarantee is made about the safety or competence of the software to perform as claimed. No responsibility or liability is taken for any damage, destruction or loss of data caused by using this software.