GeoPlayer is a commodore 64 program that play wave file. In order to use this program you have to use a Georam memory expansion cartridge and a 1541disk drive emulator like SD2IEC. GeoPlayer may reproduce sound in two manner. The first is using register 0xD018 of the SID (sound interface device 6581 or 8580), the second and the better is using DigiMax that allow to reproduce sound at 8 bit resolutions. The supported sample rate is 8, 11, 16, 22KHz, sample resolution 8 bit (16 bit is supported too but the program make a downsampling during the upload the file in the GeoRam memory. To create compatibile wave file I use audacity or sox (command line program for unix like os).
Other than play wave file tha program have other feature like play .sid file, show koala image, and last but not least an old fully works assembler monitor SuperMon64 written in the late 1980 by famous guys beind the commodore scene like Wozniak, Baum Jim Russo, Bill Seiler and Jim Butterfield.
The routine that play wave file was from Greg Nacu, the the file browser is a ported of GeoUplod by Skoe ( the aouthr of the famous easyflash cartridge).
If you want to try GeoPlayer without real hardware you can use vice64 emulator. In VICE is possible to emulate all necessary hardware devices like GeoRam, DigiMax, 1541 drive etc.
But if you have solder electronic skills, I suggest too build your own devices. You can find DigiMax gerber in the Vanessa archive, and on HuckUp.net website all neccessary file with step by step istructions to to build a NeoRam cartridge (a GeoRam clone).
The GeoPlayer program can be downloaded from CSDB
I made a video that you can see on YouTube at this link
Have fun 🙂
