The Samson Graphite M25 USBDefinition:
(Universal Serial Bus) A standard, bi-directional serial connection between computers and peripheral devices. MIDI Controller' semi-weighted keyboard features 25 velocity-sensitive keys, trigger pads with aftertouchDefinition:
A modulation signal added by exerting pressure on a keyboard key after it has already been pressed down., a full-featured control surfaceDefinition:
A device that provides mechanical controls, such as switches, rotary controls, and faders to provide hands-on control of software parameters. A typical application is creating a box with faders to control the levels in a software mixer. and additional programmable functions for advanced playability and customization. The Graphite M25 also features iPad/USB bus power and plug-and-play operation.
The Samson Graphite MD13 USB MIDI ControllerDefinition:
Keyboards, drum pads, wind controllers, guitar controllers, and other physical devices that allow human control over synths and samplers. features 13 programmable/assignable velocity-sensitive pads that are backlit and chromatically arranged. In addition, the MD13 offers six parameter knobs, a DJ-style crossfader, iPad/USB bus power / plug-and-play operation, and an array of other programmable controls.