TouchOSC is a cross-platform music composing and performance application. It allows users to compose and perform music using a combination of built-in instruments and custom modules, controlled through the TouchOSC interface. Users can also create and control their own modules, which can be inserted into the score at any point. Modules can be arranged in different ways, including in a sequence, parallel, and series layout. They can also customize the instrument’s sound by setting different scales, tone colors, and sound effects. TouchOSC is a modular OSC and MIDI control surface for Android.