Table of Contents
Advertisement
Cycle on
Switches to Fast.
Sliders set the base
pitch and waveshape
Level controls volume
Rise/Fall CV fully to
the left
Optional: Sound
source to be AM'ed
Optional: To mixer/
output amp
Making Other Synth Drum Sounds
In the Making an Oscillator patch, we created a kick drum which decays to an inaudible tone below the
range of human hearing. To create a higher-pitched drum, such as a tom-tom, we will need a VCA to
cut off the audio after the drum decays.
Raise the pitch of Channel A using the sliders or Channel B's Offset knob. You should hear a steady
tone between Channel B firing. Now we'll route this sound through Channel B's VCA. Unpatch the
cable going to the mixer and patch it into Audio Out B instead. Patch a cable from Env Out A to Audio
In B. Now you should hear a similar drum sound, but it will be silent between hits. If you are using the
exponential modification in the previous patch, you probably will want to dial it back because the VCA
itself has an exponential response.
To add some noise to the sound, you can patch an external oscillator into Audio In A. Then move the
patch cable going from Env Out A to Audio In B so that it goes from Audio Out A to Audio In B. The
external oscillator will be amplitude modulated (AM) with the synth drum sound, and this resulting
sound will be VCA'ed with Channel B's envelope. Play with Channel A's sliders and Rise/Fall CV knobs
to hear the range of possible sounds. Next use any of the Env Out jacks to modulate the external
oscillator in time with the synth sound.
Try adding slight modulation to the Time CV of Channel B to create organic, naturally changing drum
sounds. A slow LFO or a CV sequencer will work nicely.
Slow
Cycle
Med
Fast
Rise
Fall
Slow
Level
ENV
OUT
Fast
A
Rise
Fall
Offset
Time CV
Rise
Fall
Trigger
EOR
Follow
In
Out
A
OR
VCA CV
Env
Out
Audio A
Dual EnvVCA
Page
11
Slow
Med
Fast
Rise
Fall
Slow
Level
Fast
B
Rise
Fall
Offset
Time CV
Rise
Fall
Trigger
EOF
Follow
A
In
Out
B
VCA CV
Audio B
of
20
Cycle off
Rise switch to Fast.
Fall switch to Med.
Rise and Fall sliders
control attack and
decay of kick drum
Level controls
amount of modulation
From trigger source
(gate sequencer,
clock, manual trigger,
etc.)
To mixer/output amp
Advertisement
Table of Contents
