Scala

Scala is a freeware software application with versions supporting Windows, macOS, and Linux. It allows users to create and archive musical scales, analyze and transform them with built-in theoretical tools, play them with an on-screen keyboard or from an external MIDI keyboard, and export them to hardware and software synthesizers. Scala can retune MIDI streams and files using pitch bend. It also supports MIDI sysex and file-based tunings. Originally a command-line program, Scala now uses the GTK+ GUI toolkit. Scala is written in the Ada programming language, and is the work of Manuel Op de Coul of the Netherlands. Scala can also be used as a midi sequencer, by way of its ASCII-based sequencing format, seq. Because of its great flexibility when it comes to tuning formats, it is a very powerful tool for those who want to compose and sequence microtonal music. Scala's motto is , Latin for 'it finds and perfects' or 'it discovers and accomplishes'. Its logo is a Renaissance-style relief print of a cherub holding a compass and a globe inscribed with a diatonic musical scale and a circle of fourths.