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RSF | Kobol Expander
The rack version came in four different components.
The Kobol Rack (Expander I) was essentially only the VCO/VCF/VCA/LFO sections of the Kobol in a rack module. It features 2 VCOs with sweepable, waveforms, 2 ADS envelopes, an LFO, a VCF,Noise Generator, reversible voltage processoer, decay on/off, a self-oscillating 24db low pass filter, and 1 volt Ocatve CV/Gate inputs.
The Expander 2 was an add-on to the Kobol that added some new processing modules. The 19" 3 U space unit features a Ring Modulator, Envelope, a VCA, an LFO, Mixer with 3 inputs and 1 output. Additionally it has a Sample & Hold module with internal or external clock, a Noise Generator, Voltage processor that is delectable Linear or Logarithmic, Voltage Inverter, Gate Delay, an Envelope Follower, Lag Generator, and finally 2 multiples.
The Programmer rack module contained the memory circuits for storing patches and sequencing.
And the KM8 was an 8-channel rack-mount mixer.
The connections between modules were normalized but could be bypassed by external patches, similar to other semi-modulars like the ARP 2600 and Korg MS-20.
|LFO||1 LFO, triangle, square waveforms, rate knob|
|Engine Detailed||2 VCO's; triangle, square, saw, pulse; variable sweep|
|Filter (VCF)||1VCF 24db low pass|
|Envelope (VCA)||2 ADS envelopes|
|CV-gate||CV/Gate 1 volt / octave|
|Produced:||1979 - 1979|
|Legend:||Obvious||Y: Yes, N: No, N/A: Not Applicable|
|VCO||Voltage Controlled Oscillator||DCO||Digital Controlled Oscillator|
|LFO||Low Frequency Oscillator||Sub||Sub Oscillator|
|VCF||Voltage Controlled Filter||VCA||Voltage Controlled Amplifier|
|Velocity||As with a piano, the harder you hit a key, the louder the sound, unlike most organs which always produce the same loudness no matter how hard you hit a key.||Aftertouch||Pressing a key after you activated it. Channel Aftertouch, no matter which key, it will send a Channel message. Poly Aftertouch, sends the pressure per key instead of the whole channel.|
|Values for OSC, LFO, Filter, Envelope are per voice unless stated otherwise.|