Unity synthesizer can create professional quality synth sounds with on screen or external MIDI keyboard. The base configuration includes two synth engines (Retro AS-1 analog and Unity DS-1 sample playback) and twenty three audio effects, along with seven sound banks including General MIDI, Best of Retro AS-1, Pipe Organ, Rock Pop drum and percussion loops banks. An arpeggiator, sequencer, and scales can be used for real-time MIDI playback.

Additional in-app purchases include sound libraries and banks, synth and effects parameter editors, appearances, arpeggiators, sequences, and scales.

Fourteen synthesis engines along with twenty three audio effects are part of the complete package. All synthesizer, modulation, and effects parameter editing is supported to edit existing sounds, or create your own new ones. User banks can be stored to iCloud, allowing you to access your custom sounds from all of your iOS devices.

Standard MIDI file sequences are supported via the Document folder accessed via iTunes.

Synthesis engines:

AS-1 - analog model with three oscillators, ring modulator, two multimode filters, and portamento
DS-1 - sample playback with two stereo time-stretch oscillators, two multimode filters, and portamento
SP-1 - sample playback for AIFF or wave files
BW-1 - bowed string model with bow, position, and string parameters
CL-1 - clarinet model with breath, reed, mouthpiece, embouchure, and bore parameters
BR-1 - brass model with breath, mouthpiece, embouchure, and bore parameters
FL-1 - flute model with breath, embouchure, and bore parameters
EP-1 - electric piano model with hammer, tine, and pickup parameters
HS-1 - hammered dual string model with hammer, string, and filter parameters
GL-1 - glottal model with oscillator and two eight stage vocal tracts
FM-1 - eight oscillator frequency modulation with variable audio routings
VS-1 - four oscillator sampled vector synthesis
WS-1 - eight oscillator sampled wave sequencing
AS-2 - analog model with five oscillator, ring modulator, three multimode filter, and portamento

All synthesis engines include a complete modulation matrix. Modulation sources include MIDI controllers as well as the envelopes, LFOs, ramps, and random generators. Modulation destinations include volume and pan as well as synthesis engine specific ones such as the AS-1 filter cutoff, or CL-1 breath input. Modulation routings route a source to a destination by an amount with optional tables or smoothing.