The monologue contains monophonic analog synthesizer circuitry that builds on the circuitry of the minilogue. But that doesn’t mean that the monologue is simply a one-voice model of the minilogue. It’s a monophonic beast with stunning power that comes from a redesigned envelope section, modulation routing, and a filter with powerful low-end punch.

The structure is 2VCO, 1VCF, 1EG, 1VCA, and 1LFO. In addition to the same distinctive circuits as on the minilogue (such as the wave shaping that shapes the overtones of the oscillator, and a sync/ring switch), the filter section uses a two-pole filter to deliver aggressive sound. Newly featured is a drive circuit that adds overtones and distortion to the sound, letting you generate fat basses and sharp lead sounds to your heart's content. The LFO rate can be adjusted into an unprecedentedly ultra-high-speed range to generate crazy space-shattering sounds, or switched to one-shot mode to act, in a sense, as an additional envelope.

The keyboard section features the acclaimed slim keybed of the minilogue and the MS-20 mini. To make monologue a synth that any musician can immediately pick up and play, the keyboard covers the E–E range of notes - just like a guitar or bass.

The step sequencer of the monologue has been significantly enhanced to deliver musical, complex rhythms that are easy to capture, see, and edit. It supports both real-time recording with overdubbing capability as well as step recording that lets you record simply by pressing keys in the desired order, and you can also use the 16 physical buttons for quick editing or for improvisatory performance. The motion sequence function lets you record up to four knob movements to apply time-varying change to the sound, and allows you to record not only continuously changing values as on previous models, but also values with step-wise variation. Since it's designed to let you create different sounds at each step, you can make unprecedented sequences, such as a sequence that generates a drum pattern from a single program.

There's also a key trigger function that lets you play back a sequence while you hold down a key, and even transpose it. Another new function is slide, which can be used to produce smooth bass lines by specifying portamento for each step.

Music has long been restrained to equal-temperament scales, and today, very few machines support microtuning. The monologue has a set of factory tunings and well as 12 user slots and is compatible with MIDI Tuning Standard 3Byte messages. 

The power of microtonal music is evident in the work of Aphex Twin, who has come onboard as advisor for the implementation and also to offer scales, sounds and sequences as part of the factory presets. All players are encouraged not just to use these Aphex Twin-created scales, but also to create their own scales and explore their own world of frequencies.

From smooth curves to muscular straight lines. The stylish visuals featuring aluminum and wood are inherited directly from the minilogue, but have been modified to a straight, direct design that bespeaks the power of a monophonic instrument. In spite of its stout construction, the compact and light-weight body is only 1.7 kg / 3.78 lbs., providing an unprecedented combination of toughness and portability.

In addition, unlike most analog synthesizers in its class, the monologue can operate on batteries. Even if you're a hardware performer who uses numerous units, you won't need to worry about providing additional power supplies and installation space.