Substitute is a free virtual analog synthesizer designed to meet the demands of subtractive synthesis. It offers a comprehensive set of classic features including dual oscillators with traditional waveforms and an oscilloscope, as well as support for custom single-cycle waveforms and recording capabilities. The synthesizer includes analog-style filters with a spectrum meter to shape your sound precisely.

The extensive modulation system features four envelopes and four LFOs, providing deep sound design possibilities. Additionally, Substitute supports CV outputs, allowing seamless connection with external instruments. A creative effects section offers a range of tools such as delays, waveshaper, compressor, reverb, noise generation, ring modulation, frequency modulation, tone control, bit reduction, and saturation, enhancing the sonic palette.

Substitute also includes a MIDI chord generator and a classic arpeggiator to assist in composing and live performance. The synthesizer was updated to include a LE version without CV outputs to ensure compatibility with various digital audio workstations. This combination of features makes Substitute a flexible and powerful tool for music producers seeking a rich subtractive synthesis experience.