MSX Info pages

Sound mods

Sound projects

 FM-PAK Circuit diagram, Eagle PCB design by Erik Luppes
   

 FM-PAC/FM-PAC stereo design notes 

 Convert SCC game to SCC sound cartridge, article by Jipe from the MSX Cafe

 Build a switch in a Konami SCC cartridge  to use it as a music cartridge or as the original game

 Toshiba HX-MU900 upgrades by FRS

Three upgrades where done on the HX-MU900:
1) 256KB SampleRAM
2) MSX-Audio BIOS
3) Audio input (for recording)
The first two are complete and work perfectly. The 3rd upgrade, the audio-input, do not work as well as it should. The HX-MU900 indeed record samples, but there is some problem on the analog portion of this upgrade that is beyond my skills: it records quite some background noise on the samples. I only have digital-electronics knowledge, thats why I can't figure whats wrong. I've included the unfinished 3rd upgrade in the guide in hope that someone with analog electronics skill could help to solve this background noise nuisance.

 Pseudo stereo circuit by Pierre Gielen

See also
 Updated pseudo stereo circuit in CUC magazine

Description to build 256kB Sampleram into Philips NMS1205 MSX-Audio Jon de Schrijder, 1998
 Build 256kB Sampleram into Philips NMS1205 MSX-Audio

 PSG stereo mixer by Ivan Isidro
This is an adaptation of the article in http:/home.swipnet.se/~w-16418/tech_stereo.htm for the S1985 as found in many MSX-2 like Sony-2

 Stereo mixer for PSG

 Convert Muziek module to MSX Audio
From Xelasoft SME-3 userguide

 MIDI interface
MSX Magazine, Disk-FAN 4/5

Do it yourself MIDI interface,
 MIDI interface

 Testprogram's in diskimage
See also the hardware section for sound fixes to various computers

 

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