Roland VC-1 D-50 - Manual (Page 39)

39
Overview of the VC-1
PCM sound generator
A PCM sound generator provides 128 different PCM sampled sounds (= waveform).
fig.07-04(BlockDiagramPCM)
Structure
Structure , which is one of the Common Parameters, determines which two of the hypothetical
synthesizers (a synthesizer sound generator or a PCM sound generator ) are to be used as Partial 1 and
Partial 2.
fig.07-05(PertialMix)
• These two Partial sounds (Partial 1 and Partial 2) can simply be
mixed as show below. By mixing two Partials, fatter sounds can
be obtained. This is effective for making strings or organ type
sounds.
fig.07-06(RingModulatorBlock)
• Partial 1 can be mixed with the ring-modulated sound of
Partials 1 and 2. ( “Ring Modulator” (p. 40))
Tone
A Tone consists of two Partials (Partials 1 and 2) and a Common block. Some Common parameters
apply to both Partials (Partial 1 and 2) . “ Structure ” is one of the Common parameters. It decides which
of the two sound generators is used for each Partial. Other Common parameters are an ENV for pitch,
three LFO modules, equalizer, chorus, etc.
Pitch
Processor
Interpolator TVA
DSP ROM
PCM Wave
Memory
Envelope
Generator
TVA WG
2
Mixer
Partial 2
Partial 1
Mixer
Partial 2
Ring
Modulator
Partial 1
3
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