XBase 09 Operating Manual Page 15
sound. It is possilble to set both PULSE and NOISE to 0, emabling bass drum sounds completely
without attack or with PULSE or NOISE components only.
EQ smoothes the bass drum sound with a gently sloping filter. Use this for creating soft TR 808
like kick drum sounds.
4.2.1.2 Snare Drum Parameter
TUNE Just as on the TR909, TUNE controls the pitch of the two percussion oscillators, but with
an extended range of control.
XSNAPP controls the proprtion of noise in the snare sound and is actually filtered noise, just as
in the TR909, but with an extended range of control.
DECAY controls the snare’s noise decay time, just as "TONE" does on the TR909, but with an
extended range of control.
DETUNE detunes the snare drum oscillators
NOISE TUNE tunes the snare drum’s noise filter. If NOISE TUNE is set to 0, the noise signal is
turned off, leaving only the two oscillators sounding. Using the TUNE parameter you can
generate various percussion instruments with sounds similar to rim shot, cow bell or tom tom.
4.2.1.3 Hihat Parameters
The Xbase09ïs hihat section is essentially a monophonic sound generator that can play any of six
selectable samples or noise. "Monophonic" means that you can’t play Closed Hihat and Open
Hihat at the same time, (just as on a real hihat).
As in the original TR909, "Open Hihat" and "Closed Hihat" samples are six bit samples
You can substitute the "Open Hihat" and "Closed Hihat" samples with other onboard samples.
These are: Rim shot, Clap, Crash Cymbal and Ride Cymbal.
The Crash and Ride samples can be played back with the short "Closed Hihat" envelope. Noise
can be assigned as sound source instead of a sample All samples can be played back backwards
excepting "Ride Cymbal".
Sample assignment is arranged in the following order:
HH Sample
Select
HH CLP CrH rid noi
C H Closed Hi Hat Rim Shot Crash short Ride short Noise short
O H Open Hi Hat Hand Clap Crash long Ride long Noise long
C H Reverse Closed HH Rev Rim Shot Rev Crash short Rev
O H Reverse Open HH Rev Hand Clap Rev Crash long Rev
The samples played by either CH or OH are processed by a VCA working as a dynamic expander
that controls the volume envelope.
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