Strum is an intuitive touch-operated MIDI interface for Lemur on iPad. Choose a scale or chord using the selection matrix at the top, and strum your finger across the bars to unleash notes in a rapid array, just like a guitar or harp. Move your finger vertically up and down the bars to manipulate a control value, mappable to pitch bend, filter frequency, or any other instrument parameter. Strum supports a keyboard range of one to five octaves, variable tension, friction, and range settings, three play modes