Oakley 3031 - Manual (Page 3)

connected to the mixing desk, or whatever, without ground loops occurring. Either use a full
balanced connection or a semi-balanced connection.
2. The 3031 features a rather useful distortion circuit, with a depth control. Excellent for a
harder sound. If you think you are not into distortion, this circuit will surprise you.
3. The VCF’s cut-off frequency can be controlled by an external CV. In the standard format,
this CV can come from either the velocity CV or modulation wheel CV. Both these CVs
would be generated by a midiCV convertor like the tbDAC. However, any CV source can be
used. The voltage range is from 0V to 10V.
4. Audio Rate filter modulation is also possible via the Modulation pot. This will give you
brighter, richer and more cutting sounds.
5. The awesome new discrete sub oscillator is provided to give you really deep basslines.
Triangle wave or sawtooth outputs. The triangle gives you real deep grumbles without adding
harshness. While the sawtooth adds deep bass richness.
6. A unique CV processor allows an external CV to control slide and accent. This was the
most controversial addition to the original TB3030. It allows simple two channel analogue
sequencers to completely control the 3031. Slides and accents can be programmed with just a
turn of the control pots on the sequencer.
Many older digital hardware sequencers will only output gate, pitch and velocity information.
Other midi controllers are not implemented, and this makes controlling other 303 clones less
intuitive. Slides are often created by having to use legato notes. But with a suitable midi-CV
convertor like the tbDAC, you can simply use the velocity CV output to switch in slide, accent
or even both. This makes control of the 3031 very easy to program even with something like a
MC303 and the like. In fact, using the 3031 with the MC303 is a doddle because the four
velocity pads can control slides and accents directly.
Computer sequencer users will find altering velocity easier than assigning midi controllers.
And keyboard players will experience a new interesting playing style. It takes some getting
used to, but very powerful once mastered.
7. An external audio input to the VCF has been provided. However, the 3031 does not lend
itself to filter processing, since you cannot hold the output VCA open without repeatedly
triggering the unit. However, it is useful if you have a second VCO output from a modular or
another synth. You can then route this in with the 3031’s own internal VCO to create really
thick basslines.
8. External logic signals to control slide and accent. Logic 0 is ground and logic 1 is 10V to
12V. These are OR’d to the CV processor’s output. That is, if either the CV processor or the
logic input goes high then that function will be implemented. Do not exceed the 12V
maximum level for these signals.
9. External CVs and gate are overvoltage protected, within reason. The VCO conforms to the
usual 1V/octave standard if R9 is 100K. R9 may be set to 82K for 0.8V/octave to work with
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