Roland SH-201 - Manual (Page 15)

15
Basic structure of the SH-201
Broadly speaking, the SH-201 consists of a controller section and a sound generator section .
Controller section
The controller section is what you play.
This section conveys the performer’s actions (for example, “playing a note”) to the sound generator section,
causing it to produce sound.
The SH-201’s controller section consists of a keyboard, a pitch bend/modulation lever, the D Beam, the knobs and
buttons of the panel, and a pedal (sold separately) connected to the rear panel.
Sound generator section
The sound generator section is what actually produces the sound.
According to the performance data it receives from the controller section, the sound generator section
electronically creates the basic waveform of the sound, and specifies the tone and volume to create a wide range
of sounds.
The SH-201’s sound generator section provides numerous knobs and buttons on the panel to make it easy for you
to quickly adjust the various aspects that determine the sound (waveform, pitch, tone, volume, etc.).
Suppose that you play the “C” note on the keyboard. The keyboard sends a message of “the C note (key) was
played” to the sound generator. The sound generator receives this message and produces the sound of that note.
Next, suppose that you release that “C” note. The keyboard sends a message of “the C note (key) was released”
to the sound generator. The sound generator receives this message, and stops producing the sound of that note.
In reality, the controller section is sending more information than this to the controller section (such as the
strength with which you played that note). Based on the various types of information it receives, the sound
generator section can produce a wide range of sounds.
• More about the controller section
For more about the controller section, refer to “Playing sounds” starting on p. 16.
• More about the sound generator section
Details on the sound generator section are given in “Creating sounds” starting on p. 27.
How sound is produced
C
Performance data
(key pressed: C)
Controller section
(keyboard)
Sound generator
section
The “C” note has
a frequency of
261.6256 Hz
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