HD63C03YP +SUB manages 8 voices polyphony- DAC ym3017
Main IC chip YM2414 features 4 OP + 8 combinations - unlike DX7
synthesis based on a 6 operators system with just pure sine wave and 32 combinations algorithms.
Internal ROM contains a stored digital half sinewave on a lookup table that can be read in different way and speed, creating 7 harmonics sinewaves variations with partials overtones and fundamentals fixed settings.
ALGORITHM YS200 features several OP signal paths combinations with frequency ratio or fixed frequency: the output is fed back to its input with 7 feedback levels, as general rule, high values feedback results in richer harmonic contents.
- carrier defines the amplitude and the spectral frequency
- modulator sets the sound timbre and the relative harmonic contents.