GForce M-Tron MKII — Free Download
M-Tron MkII is a virtual instrument capturing the rare dual-manual Mellotron MkI/MkII and Chamberlin Musicmaster, specializing in vintage rhythms, accompaniments, and lead sounds with advanced synchronization and editing tools.

Purpose and Heritage
M-Tron MkII celebrates the original dual-manual tape instruments from the 1960s, focusing on the Mellotron MkI/MkII and Chamberlin Musicmaster. Unlike M-Tron Pro, which emulates the later M400, this instrument dedicates itself to the earlier models’ unique rhythms, accompaniments, and lead sounds. It offers an authentic experience of these rare machines, sourced from the Streetly Archives.
The instrument preserves the character of the original tapes, including their imperfections, capturing a distinct mid-century sonic palette. It is designed for composers and producers seeking evocative, grainy tones that defined an era of music.
Key Capabilities
M-Tron MkII mirrors the original’s dual-manual layout: the left manual plays rhythms and accompaniments, while the right manual plays leads. Unlike the original, the right manual can also load rhythms, enabling hybrid fusions. A Dual Rhythm Mode layers two rhythms from different tapes, and a Parallel Trigger option allows simultaneous playback.
Extensive tools include host sync, transposition, tape half-speed, reverse, and a two-second rewind feature. Individual key editing controls tape start, detune, pan, and key click, with presets for recall. A Chord Finder visual aid assists in selecting matched rhythms and accompaniments. The interface includes reverb and delay effects.
Workflow and Performance
You can control each manual independently using two smaller keyboards or a single 88-note keyboard. The instrument supports retuning entire banks while maintaining host tempo, allowing creative transposition. The library includes both microphone and DI recordings of lead tapes, offering tonal variety.
Rhythms and accompaniments can be synchronized to your host’s tempo and transposed to fit compositions, making it adaptable for modern production. Unlooped tape banks provide an authentic playing experience, replicating the natural length of original tapes.
Practical Applications
This instrument suits genres that benefit from vintage tape textures, such as psychedelic rock, progressive rock, and film scoring. Its ability to blend US and UK recordings adds unique tonal contrasts. The half-speed and reverse features enable experimental sound design beyond traditional usage.
It is ideal for creating authentic period-specific accompaniments or layering rhythms for complex arrangements. The chord finder simplifies matching harmonies, streamlining workflow for both live performance and studio composition.
Key features
- Includes rhythms, accompaniments, and lead sounds from 1960s dual-manual instruments
- Offers Dual Rhythm Mode and Parallel Trigger options for layering
- Provides host sync, transposition, and tape manipulation controls
- Allows individual key editing with saveable presets
- Includes a Chord Finder visual aid
- Supports control via two keyboards or one 88-note keyboard
- Features reverb and delay effects
- Contains unlooped tape banks for authentic playback
Best for
Best for producers and composers seeking authentic 1960s tape-based sounds, especially those wanting to incorporate vintage rhythms and accompaniments with modern flexibility. Ideal for progressive rock, psychedelic, and film scoring, offering both faithful emulation and creative juxtaposition of rare sonic material.