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8.6 The VCA and the BYPASS-function
A VCA is a Voltage Controlled Amplifier and provides amplitude modulation or in other words dynamic level changes of a signal. The corresponding control elements are [vca-mod]-switch (39),
[balance]-knob (41) and the rearpanel socket ”OUTPUT“ (23).
front: (39) [vca-mod]
The [vca-mod]-switch (39) has three positions. It selects one out of three modulation sources for the
VCA.
Position „ENV1“ (left):
Position „noisegate“ (center):
Position „ENV2“ (right):
Envelope generator ENV 1
Noisegate
Envelope generator ENV 2
front: (41) [balance]
The [balance]-knob (41) lineary controls the mix of both filters VCF 1 and VCF 2. In fully counter
clockwise position, the VCA gets only the signal of VCF 1, in fully clockwise position only the signal of
VCF 2.
front: (40) [bypass]
The [bypass]-switch (40) routs one out of two possible audio sources to the ”OUTPUT“-socket (23).
Position „ON“ (left):
Position „BYP“ (center):
VCA-output
Signal at „INPUT“-socket (24) attenuated of 5.6 db
Please note 1: The bypass-mode is an active one, and no so called true bypass (direct connection via
e.g. relais). When the unit is powered down, the sockets (23) and (24) are disconnected.
Please note 2: After powering up, the unit remains in bypass-mode for approx. 1 sec. before the ”ON”mode becomes active, even if the [bypass]-switch (40) is in ”ON“-position.
user manual e b b e u n d f l u t
l 38