Analogue Solutions Concussor - Manual (Page 10)

ANALOGUE SOLUTIONS
CONCUSSOR e&oe (c) 12-2007 10
BD78 Bass/Conga/Bongo Drum Module
Inputs: Outputs: Pow er:
Trigger socket 5-12V x2 3.5mm audio out +/-12V
6.35mm audio out
Controls: Indicators: Size:
Tune Trigger LED 10HP
Decay
Level
Use
The trigger input has a range of about 5 to 12V. A trigger or gate signal of at least 5V will trigger the sound. A larger
trigger pulse will increase the level of the sound (accent the notes). Note, the BD78 does not have a separate accent
input.
The trigger LED will light each time a trigger pulse is received.
Controls
Tune Tunes the bass drum up or down
Decay Sets decay time
Level
Sets output level
Introduction
The BD78 is an accurate replica of the CR78 bass drum sound. The module
is entirely discrete analogue circuitry, based as closely as possible on the orig i nal.
The CR78 bass drum circuitry is identical to the CR78 Bongo and Conga sounds,
so these can also be produced with the BD78.
The BD78 can produce more than just bass drum sounds...
The BD78 has the addition of a tune control. This enables the pitch
to be brought right up. This in conjunction with short decay times allows
CR78 style Bongos and Congas to be produced.
☺
The BD78 can be tuned way low with long decays... watch your bass
bins mate!
Due to the way the CR78 bass drum circuitry works (using a tuned-resonance ciruit), the Tune and Decay
controls affect each other. At certain combinations of settings, the BD78 may go into self-oscillation, with loud
results! The BD78 circuitry was never designed to have manually variable Tune and Decay controls, and as we
wish to retain the original sound, this by-product has been left in and cannot be deisgned out anyway without
such a re-design it would no longer be the same drum sound. Also, you may get some small noise when you
rotate Decay pot. This is normal and not a fault with the control.