Updated version of the 1986 software instrument brings mouse-driven composition to macOS and Windows. Music Mouse 2.0 adds MIDI sync, DAW integration and expanded presets while retaining the original concept.
In the mid-1980s, composer and programmer Laurie Spiegel developed Music Mouse, a software instrument that transformed the computer mouse into a tool for generating harmonies, melodies and arpeggios. Designed for early home computers including the Atari, Amiga and Macintosh, the programme approached digital music-making from a compositional rather than purely technical perspective.
Now, Eventide has released a modernised version of the software. Music Mouse 2.0 updates the original for current macOS and Windows systems, while retaining its core interaction model – using cursor position to determine pitch relationships and musical structure.
A compositional instrument, not an effects processor
When Music Mouse first appeared in 1986, much of the development of computer music centred on sound synthesis and digital effects. Spiegel’s approach differed. Rather than focusing on timbre or signal processing, she designed the software as what she described as an “intelligent instrument”, capable of responding to user gestures within pre-defined harmonic frameworks.
The idea behind Spiegel’s design encouraged users to think in terms of phrases and gestures. While it allowed free exploration, it was also intended as an improvisational and brainstorming tool that supported musical structure through algorithmic logic.
Over the decades, the software found a place among experimental musicians and synthesiser users interested in alternative approaches to composition. Its interface, built around what Spiegel called the “Polyphonic Cursor”, enabled users to move through harmonic spaces visually rather than through traditional keyboard input.
Music Mouse 2.0 – integration and expanded functionality
The new version introduces compatibility with macOS 10.14 and above — including Apple Silicon systems — and Windows 11. In contrast to the standalone nature of earlier editions, Music Mouse 2.0 can now run directly within your DAW, allowing users to record MIDI data.
The update also adds external MIDI clock synchronisation, enabling the software to lock to hardware, DAWs or scoring programmes. Expanded presets derived from Spiegel’s original Yamaha DX7 and TX7 patches are included, alongside clearer visual feedback, scalable interface options, and both left- and right-handed layouts.
According to Tony Agnello, First Engineer at Eventide, the decision to revisit the instrument stemmed from recognition of its distinct historical role. He noted that, at a time when much emerging technology was centred on new sounds and effects, Spiegel’s concept treated the computer as a collaborative musical partner.
Spiegel’s broader body of work spans acoustic and electronic composition, programming and visual art. Her realisation of Johannes Kepler’s Harmony of the Planets was included on the Voyager spacecraft’s 1977 Golden Record, and her catalogue has been released by labels including Unseen Worlds and Philo. Music Mouse formed part of her ongoing exploration of interactive systems designed to extend human musical decision-making.
Music Mouse 2.0 is available now via Eventide’s website for $29. Free demo also available.
Find out more about Laurie Spiegel.
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