M4U XL Introduction Thank you for choosing the ESI M4U XL. M4U XL is a convenient 4-in / 4-out USB 2.0 MIDI interface with 64 channels for PC and Macintosh systems. With M4U XL you can obtain perfect MIDI timing and performance at an extremely affordable price.
MIDI Devices with 4 I/O ports. General Information Trademarks: ESI, M4U and M4U XL are trademarks of Ego Systems Inc. and ESI Audiotechnik GmbH. Windows is a trademark of Microsoft Corporation. Other product and brand names are trademarks or registered trademarks of their respective companies.