Humble Audio Quad Operator
Current: 140mA @ + 12V, 13mA @ -12V
Current: 140mA @ + 12V, 13mA @ -12V
Humble Audio Quad OperatorWith 4 operators (oscillators) and a flexible and powerful modulation matrix, the classical FM structure like DX presets, as well as continuously evolving textures, experimental feedback patches, and LFO mode complex This is a quad operator bank that can also be used as a modulator. There is no concept of a modulated carrier, it consists of only four operators who can freely apply cross modulation.
Each operator can switch between Lock and Free states with a switch. Locked operatorsCoarseとendThe frequency is controlled within a range that is a perfect integer frequency ratio for both parameters. This is very important for producing waveforms with harmonic overtones, which is suitable for classical FM sounds.DetuneControls introduce delicate or extremely anharmonic effects that deviate from this integral ratio relationship.
In the free state, each operator basically functions as an independent oscillator. In this case, for each operatorRatioEach knobCoarseA tuning knob (continuously variable type),Ratio CVIs for each operator1V / Oct controlWill be. You can use up to 4 independent oscillators if the modulation is all zero. In this situation, the modulation still applies, but FM without frequency / phase lock tends to be inconsistent.
Quad Operator can input an external signal as a modulatorAR FMInputAudio inputI have implemented a circuit. Above the input jack is an LED to indicate clipping and a gain adjustment knob. The signal size of the AR FM input can also be controlled by voltage by the gain CV input for AR FM below it. The signal to the AR FM is first adjusted by the master's gain, and then the amount of modulation send to each operator is controlled by the four knobs at the bottom of the modulation matrix.
Sold separatelySomethingexpanderWith all operatorsAR FMInput eachMod xAdds the ability to save all knob positions (modulation matrix parameter values) and crossfades. Conceptually, each slot can be thought of as a classical FM synthesizer algorithm. It has three slots, A, B, and C, and a Live slot, which means the knob position of the current modulation matrix.
It can be confusing the first time you play the Quad Operator, as playing around with a lot of parameters can easily lead to a noisy and harmonious sound. As a starting point, set the parameters with reference to the following to avoid chaotic results. By moving knobs and patches with this setting as the starting point, you can gradually approach dissonance and noise.
V / OctとRatioIt is important to calibrate so that a 1 volt change in the input (free state) can be accurately interpreted. If you feel that your Quad Operator is not following the pitch correctly on these inputs, follow the steps below to perform the calibration.
The Quad Operator has a precision DAC output, allowing each operator to output an accurate voltage output signal. This allows calibration without the need for an accurate external reference voltage.
First, patch the module as follows
Not OP1 to 3, but definitelyOP4Distribute the output. The calibration process makes some additional corrections to this distribution. Buffed distribution can introduce a small amount of gain that modifies the output voltage. Non-buffed distribution is important as it will adversely affect the measurements made during calibration.
Once you have successfully patched the module as described above, trigger the calibration procedure according to the "Cheat Code" below.
When the calibration procedure is triggered, the gain LED will flash twice and then return to normal operation a few seconds later.