Voice Architecture - Akai S6000 Operator's Manual

STRUCTURE

VOICE ARCHITECTURE

A single voice on the S6000 is not unlike any typical synthesiser and a simplified block
diagram of one voice looks something like this:
Rate
Mod
Whereas on a synthesiser, you have oscillators with preset waveforms (or preset samples contained
in Read Only Memory - ROM) which you cannot change, the S6000 allows you to record any
sound you want which can be then used as a waveform in any of the four keygroup zones for an
almost unlimited range of sounds. These are then mixed, tuned and fed through a multi-mode
resonant filter and then through an amplifier. The keygroups are then mixed and fed through a final
output section that controls overall level and pan/balance.
The keygroup's pitch, filter and amplifier and the final output section all have assignable modulation
inputs allowing them to be controlled by any of the controllers (the filter and amplifier also have
their own dedicated ADSR envelope generator).
Two Low Frequency Oscillators (LFOs) and a multi-stage auxiliary envelope are also available
and using the S6000's Assignable Program Modulation (APM) function (see the next page for a
more detailed description of this), these can be freely assigned to pitch, filter, amplitude and also
LFO 1 and LFO 2 rate, depth and delay where their control signals may be mixed and inverted for
a wide range of effects. The dedicated filter envelope and amplitude envelope can also be used in
the APM matrix.
MIDI controllers such as modwheel, pitchbend, aftertouch, velocity and a user definable external
MIDI controller may also be routed to any of the pitch, filter, amplitude and/or LFO modulation
inputs. Each of the 128 voices on the S6000 is identical.
26
KEYGROUP
Keygroup
F i l t e r
Zones
Filter Mod
APM APM
Aux F i l t e r
Envelope Envelope
Keygroup Pitch Mod
APM
LFO 1
Delay Depth Rate
Mod Mod Mod
PROGRAM
Amplifier
OUTPUT
Amp Mod Output
APM
Amplitude
Envelope
APM
APM APM
APM
APM
APM
LFO 2
APM
APM
Delay Depth
Mod Mod
s5000 / s6000
PAN
Pan
Mod Mod
Modwheel
Pitch Bend
Aftertouch
Keyboard
Velocity
External
Version 1.21