Surge XT vs SynthMaster One

Surge XT is a free, open-source virtual instrument plugin and hybrid synthesizer for making music. Each patch has two scenes that can be layered or split, and each scene has three oscillators with 12 algorithms, including wavetable, FM, string, and audio input. Its listed library includes over 2,800 patches and over 700 wavetables. Other features include 12 LFO units, flexible modulation routing, and 16 effect units with 27 algorithms. Performance support includes MPE, Scala and MTS-ESP microtuning, and Open Sound Control. Surge XT runs on Windows, macOS, and Linux, with plugin formats varying by platform: CLAP and VST3 on Windows; AU, CLAP, and VST3 on macOS; and CLAP, LV2, and VST3 on Linux. It primarily needs a DAW or another compatible host, though a standalone executable is available. Version 1.3.4 is identified as the stable release for normal production use. The software is licensed under GPL3.

SynthMaster One is a wavetable software synthesizer for shaping and sequencing sounds. Its desktop version includes 1,250 factory presets, two oscillators, two sub oscillators, two filters, four ADSR envelopes, two LFOs, a 16-step arpeggiator/sequencer and 11 effect types per instance. Users can import wavetable files and extend the library by placing files in the SynthMaster One Waveforms folder. It supports Scala tuning files and drag-and-drop import of MIDI patterns into the arpeggiator. The maker says presets, waveforms, samples, favourites and MIDI programs can sync across machines and platforms. Desktop runs as a VST instrument on Windows and Mac, and as an Audio Unit instrument on Mac; Windows also has a standalone application. On iOS, AudioUnits V3 supports multiple instances in compatible DAWs, and the Files app can import and export presets, waveforms and scales on iOS 11 or later. The iOS version has 16-voice polyphony and 650 presets, compared with 32 voices and 1,250 presets on desktop. The iPhone-only app is free; the universal iOS app costs $9.99, paid once, and the desktop version costs $49, paid once.