Subject: Re: MP3 conversions disc for IIGS? From: supertimer@aol.com (Supertimer) Newsgroups: comp.sys.apple2 Date: 25 Jan 2002 15:40:46 GMT References: Organization: AOL http://www.aol.com Message-ID: <20020125104046.17658.00000440@mb-bj.aol.com> Louis Cornelio wrote: >supertimer@aol.com (Supertimer) wrote: > >> But >> as a PC user, I can do even MORE for the IIGS. Now I >> have a CD burner in my PC so I was wondering, how many >> IIGS users would be interested in a CD-ROM compilation >> full of MP3s converted to IIGS format? > >whoa! But what "IIGS format"? what would you use to play them? >& of course once converetd - are they mp3 anymore? Or just another sound >file (whetever format you are using) sourced from mp3? $D8 and aux type as $0200 A PC wave file saved with the attributes mentioned in my article and set with file type $D8 and aux type $0200 will be recognized by the Oversampler, the IIGS digital audio playback program. The file won't be an MP3 anymore. Oversampler replaces the MP3 compression with interpolation. The file is first converted to a standard wave file on the PC which is then reduced in size by downsampling to 26360Hz. On the IIGS side, Oversampler then "oversamples" the file at either 2x or 4x to gain back quality while maintaining a reduced file size. Another option would be to take the 44.1kHz wave file itself and save that with the right attributes for the IIGS and use Oversampler to play it at 1x sample rate. However, because the file no longer has MP3 compression, it will be very large this way and as mentioned in my article, the IIGS power supply has interference. In my experimentation, I have found that in order to make the 44.1kHz file sound right, you would have to upsample the file to 52720Hz (2x 26360Hz). This will give you the best sound quality at the expense of even more disk space. Oversampler is a streaming audio player so you don't need 7MB of memory to play a 7MB audio file. If you can load GS/OS and Oversampler, you can play any audio file.