3
Tune:
The sample rate generator in the HATS909 module was replaced with a Voltage
Controlled Oscillator which allows for full control over the tuning of the sound,
both manually (TUNE knob) and with VC (VC-TUNE jack). This integration of analog
control over digital sound generation gives many more Hats sounds than were
originally capable with this circuit with crushed and short ticks at each end of the
knob or control signal, and the original signature sound at about 1-2 o'clock of
the tune knob position.
Modulation switch:
The MODULATION switch taps the FM/AM signal input to either the Tune oscillator
or the internal VCA. When in FM mode, the control input is not different than
the VC-TUNE input, but it does provide an attenuation on the input signal (CV IN).
When set to AM, the signal is then mixed up with the internal envelope signal
modulating the internal VCA. Both AM and FM can be modulated with control signals
from sequencers, LFOs, envelopes etc, or modulated in the audio range, performing
Amplitude or Frequency synthesis over the source sampled sound.
The Riding 909 HATS:
Perhaps the most famous use of the 909 Closed Hats is found in so many techno
and other acid tunes and here is how you do it. The trick is to use some notes
with no accent and some with. In its most basic form, this is done with accent on
every second note in a row. An easy way to do that is to plug the pulse of an
oscillator into the CH GATE input, send the pulse also to a sequencer clock-in like
the Z8000 and have every second knob turned CW on the Z8000. Clock dividers
are also great for doing that with the divide by 2 patched to the ACCENT input.
TUNE and MODULATION switch.
PATCH ideas:
CH GATE
ACCENT IN
