VAPolyMT 1.0

This review examines VAPolyMT, a versatile bi-timbral polyphonic synthesizer compatible with iPhone, iPad, and Mac. It incorporates an analog-inspired step sequencer for each timbre and offers assignable macro controls, providing flexible real-time modulation options. The software operates both as a standalone application—with support for Ableton Link, MIDI, and audio file export—and as an AudioUnit Extension (AUv3), ensuring broad integration within various digital audio workstations.

The synthesizer architecture comprises two oscillators, a mixer, resonant low and high pass filters, and an amplifier for each voice. Users can layer or split these synthesizers to create complex textures. Built-in effects include delay, chorus, flanger, reverb, equalization, and compression, enhancing sound design possibilities. The integrated sequencer features a piano roll editor and supports parameter automation. Project files can be stored in iCloud Drive, enabling seamless access across devices.

Main features highlighted include:

• Bi-timbral polyphonic subtractive synthesis engine
• Analog-style step sequencer per timbre
• Eight assignable controllers for modulation
• Up to eight voices of polyphony per timbre
• Comprehensive effects suite and piano roll sequencer
• Support for AudioUnit Extension (AUv3)
• MIDI 2.0 compatibility and support for foot pedal and per-note control
• Cross-platform operation on iPhone, iPad, and Mac with iCloud Drive sharing capabilities
• Audio export in both linear PCM formats (AIFF, WAV, CAF) and compressed formats (AAC)
• Connectivity with Ableton Link, Bluetooth MIDI, MIDI In/Out
• Includes over 200 factory presets for immediate exploration

Recent improvements enhance the user experience by adding support for MIDI foot pedals (CC#11, CC#64) and MIDI 2.0 per-note control messages. Additionally, CC settings are saved automatically and restored upon app relaunch.

System requirements specify iOS 17.0 or later and macOS 14.0 or later; devices with Apple Silicon are highly recommended for optimal performance. Users with lower CPU specifications should consider reducing the number of voices to prevent sound distortion. The AUv3 extension necessitates a host app that supports AudioUnit extensions; compatibility is confirmed with Apple’s Logic and GarageBand on both iOS and macOS, while support in other DAWs may vary depending on application capabilities.