The HDSP System from RME is a computer audio system that consists of either a PCI/PCIe card and a breakout box for use with desktop computers, or a CardBus/ExpressCard interface and the breakout box for portable, notebook solutions.

The HDSP CardBus is a PCMCIA type II card, and the notebook component of the system. It delivers zero wait state CardBus Busmaster technology and with up to 130MB/s transfer rate in both directions, the same basic performance is provided on a notebook as a PCI card would offer on a desktop computer. Additionally the card is fully "plug and play" and compatible under Windows and Mac OS.

The HDSP CardBus and I/O box are connected using ordinary 6-pin FireWire cable. Since the card does not provide power to the attached I/O box, a compact and light-weight hi-tech switch-mode power supply is included.