Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!wuarchive!decwrl!shelby!lindy!ucscb.UCSC.EDU!unknown From: unknown@ucscb.UCSC.EDU (The Unknown User) Newsgroups: comp.sys.apple Subject: Re: ACER Message-ID: <6865@lindy.Stanford.EDU> Date: 4 Jan 90 09:47:50 GMT References: <8912311033.AA01469@apple.com> Sender: news@lindy.Stanford.EDU (News Service) Reply-To: unknown@ucscb.UCSC.EDU (The Unknown User) Organization: UCSC Undergrads Lines: 23 In article <8912311033.AA01469@apple.com> writes: >I downloaded a "talking mouse" demo from Apple2-l (which was posted a little >over 1 1/2 years ago), and it said that I needed to add sound files comapacted >with ACER. What is acer? Where do I get it? Is is freware/shareware/ect....? As someone else said, ACER is a sound compression utility.. You should be able to find it on various FTPs around the country, but if you can't, mail me and I'll send you a copy... From what I've been told, it's a very simple process.. Instead of having 8 bits represent from 0 to 255, they use 3 bits to represent 0 to 8.. So 0 to 31 in the original system would be 000 in the new system, 32-64 would be 001, etc... With most sounds, after it's decompressed you can't tell much difference as even 8 graduations is usually enough. I think some programs actually unpack ACER sounds on the fly... It's a built in GS/OS (or ProDOS 16 or something) function I think.. BUT I'M NOT SURE. -- unknown@ucscb.ucsc.edu APPLE II FOREVER APL24VR GS tips? Mail me. unknown%darkside.com@ames.arpa Please use the former address for regular use.