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MoonSound is a music soundchip that contains 2
main elements :
- the Yamaha YMF-262 OPL3 FM
sound synthesizer with 8 different waveforms,
possibility to indicate per channel whether it is
audible on the left, right or both and different
options for the sound channels :
18 two-operator FM channels
OR 15 two-operator FM channels + 5 FM drums
OR 6 four-operator FM channels + 6 two-operator
OR 6 four-operator FM channels + 3 two-operator
FM channels + 5 FM drums;
- the Yamaha YMF-278B-F YAMAHA OPL4 PCM
synthesizer unit (better known in the PC world as
wave table synthesis) with a maximum of 24 waves
simultaneously, an ajustable stereo in 16 steps
for each channel, a playback frequency upto 44.1
kHz of 8-bit, 12-bit or 16-bit data.
This soundchip is MSX-AUDIO compatible (with
exception for the ADPCM part) and has a 128 Kb
sample RAM, that can be expanded to 2 Mb.
Besides, the MoonSound cartridge includes more
than 300 samples !
To hear MoonSound, the emulated MSX machine must
include a Moonsound chip (with addition of a rom).
It's the case of all generic MSX2, MSX2+ and
MSXturboR machines, with exception for the MSX2
Only PSG machine.
For the comfort of the users, the sample RAM is
boosted to 640 Kb in all concerned generic
There's no specific MSX-BASIC command for
MoonSound is the only MSX soundchip with real
stereo, you can change the default stereo by a
fine tuning in the mixer
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