Parameter reference

A general note about parameters: some parameters vary in discrete steps. For others, it makes sense to vary them smoothly. In general, the first type of parameter is represented with switches or -/+ buttons, and the second type is represented with a slider or knob.

For example: Transpose is a discrete parameter. You transpose by an integer number of semitones, because if you want to transpose an octave down, you want the pitch to be transposed exactly an octave. On the other hand, finetune varies smoothly. If you are applying vibrato by moving the finetune control, you don't want to hear discrete steps for each cent.

Sample page

Mopis can hold two user waveforms at once, and each waveform can contain up to eight samples.

Timbre page

Oscillator section

There are two independent oscillators. Each oscillator can generate a tone based on one of the waveforms from the wavetable. Then the output of the oscillators is mixed together and passed through the filter, amplifier, and effects section before being played.

All these parameters except "Bend" and "Balance" are implemented independently for each oscillator.

Filter section

The filter section takes input from the oscillator section and attenuates certain frequency components, allowing you to sculpt the sound.

Lowpass filters attenuate frequencies above the cutoff frequency: the further above the cutoff, the greater the attenuation. Similarly, highpass filters attenuate frequncies below the cutoff frequency. Finally, bandpass filters attenuate frequencies symmetrically around both sides of the cutoff.

The resonance or Q control both tightens up the slope of the filter attenuation and boosts (or "resonates") the frequencies very close to the cutoff frequency.

Amplifier section

Voice section

Assign page

Assign table

The assign table allows you to modify almost any synth parameter according to other parameters in the style of a modular synth. Since these parameters can change over time, the assign table lets you create extremely complex evolving sounds.

There are eight slots in the assign table, and they are interchangeable. The assign source specifies the parameter that will control the destination parameter. The assign destination specifies the parameter that will be modified. The assign modulation amount controls the maximum amount to alter the destination parameter.

The valid assign sources are:

Delay section

Mopis provides a built-in delay (or echo) effect. The delay is applied to the output of all the active voices together.