Yamaha RM50 Owner's Manual page 39

Element Structure Next, let's look at how a voice element is configured. The figure below depicts
the basic element structure as a block diagram.
Modulation Pitch Bend — Filter Cutoff Decay Volume — Balance Pan
WAVEFORM
BLOCK
Velocity [Velocity |
Curve a
30
ia
DA. DA. | DA. SYSTEM
KIT
| VOICE
| ELEMENT
R
| PAN BLOCK
_—_________»» Ind
AMPLIFIER
~ |} FILTER BLOCK
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* Voice common
Every element begins with a waveform block consisting of a waveform
selection plus a sub-block which controls its pitch. The RMSO gives you a wide
selection of 133 preset waveforms to choose from. You can also create elements
based on waveforms on wave cards you insert in the RM50's WAVEFORM
slots. And if you have elected to add the optional wave RAM area to your
RM50, you can use this area as a third source of waveforms.
The pitch at which the waveform plays is set by the element pitch parameter
and modified by the Easy Edit pitch offset. Its basic pitch can be adjusted by
many factors, such as the note number (when the voice is played as a pitched
voice); a pitch envelope generator (PEG), which determines how the element's
pitch changes over time; pitch modulation added by the LFO block; and MIDI
pitch bend messages.
The output of the waveform block is modified by a filter block , which
changes the tene of the element by removing frequencies from the upper or
iower end of the output signal. The cutoff frequency — the frequency level at
which filtering begins ~ is set by an Element Filter function and modified by the
Easy Edit filter offset. It can be changed by factors such as control change mes-
sages and filter modulation added by the LFO block.
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