Technical data

an organ-like sustained sound with on-off keying. This
is not quite so, as the following shows:
14. Place the RELEASE control to "700."
15. Leave the RELEASE switch to the right. Check to
see that the LOUDNESS SUSTAIN switch is to the
left.
16. Play the keyboard. Sound has organ-like
keyboard response.
17. Place the LOUDNESS SUSTAIN switch in the
non-sustain position to the right. Now play
and hold a key until the sound dies out. Play a
series of short, separated notes and then hold a
key until the sound dies out.
(END EXERCISE)
The preceding shows that when both the
RELEASE switch and the LOUDNESS SUSTAIN switch
are to the right the following is true: (1) The sound can
never last longer than the combined settings of the
LOUDNESS CONTOUR controls, regardless of how
long a key is held; (2) The release of a sound will
always be abrupt when all keys on the keyboard are
released.
Since the LOUDNESS CONTOUR sections,
LOUDNESS SUSTAIN switch, and RELEASE switch can
be set in many different combinations to create a
variety of voltage contours, here is a pictorial review
of some of the possibilities:
KEY DEPRESSED KEY RELEASED
RELEASE
LOUMESS
SUSTAIN
RELEASE
LOUMESS
SUSTAIN
RaEASE
LOUMESS
SUSTAIN
RELEASE
LOUMESS
SUSTAIN
RaEASE
LOUMESS
SUSTAIN
RaEASE
LOUMESS
SUSTAIN
XV. A
RELEASE
LOUMESS
SUSTAIN
XV A
ATTACH /"V RELEASE/V
LOUONESS CONTOUR
ATTACK /-V RELEASE/V
LOUDNESS CONTOUR
oo
ATTACK /-V RELEASE/V
LOUONESS CONTOUR
OO
ATTACH /V RELEASE/^
LOUDNESS CONTOUR
OO
ATTACK /"v RELEASE/^
LOUDNESS CONTOUR
OO
ATTACK •V RELEASE/V
LOUONESS CONTOUR
ATTACK /% RELEASE/V
LOUONESS CONTOUR
MAX
ZERO
TIME —
IN
SECONDS
I
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