The Yamaha MU-series is a line of sound modules built by Yamaha. All sound modules except MU5 support Yamaha XG. The sound modules were commonly used when computers had slower processors. The computer could send MIDI commands to the sound module, acting as an external sound generation device. Later MU sound modules feature A/D inputs that allow direct input from microphones and guitars.
The MU-series product line superseded the company's previous TG-series modules, the TG100 and TG300. Although the majority of Yamaha's MU-series modules were meant for the home user, the company also made rack-mount versions of the MU90 and MU100 called the MU90R and MU100R, respectively, for professional use.
General MIDI voices only, no effects. Plastic case (7" × 4" × 1.5" (19 × 10 × 3.5 cm) with LCD display. To-Host serial RS232 38.4 kbit/s input as well as MIDI. RS232 from the PC to the MU5 using the to-host cable is retransmitted as MIDI by the MU5. MIDI into the MU5 is converted to RS232 38.4 kbit/s and sent out the to-host cable to the PC.
A beige plastic case (7" × 4" × 1.5" (19 × 10 × 3.5 cm) with -no- LCD display. Two AD input channels for guitar or microphone. Effects can be applied to the AD input channels. 12VDC (2.1mm, center pin positive jack) at @200 mA power. Headphone audio output. To-host cable and MIDI input. Users have to design and build their own microcontroller-based MIDI controllers with potentiometers in order to select and adjust the effects available in the MU10.
MU50 is the scaled-down version of the first XG module MU80. General MIDI, XG and supplemental voices. Effects included. AD input for guitar or microphone, but effects can not be applied to the AD input signal. Box metal chassis with backlit LCD display.
Two AD inputs for guitar or microphone. Effects can be applied to the AD input signal. Box metal chassis with backlit LCD display. Expandable capabilities with expansion via up to 3 Yamaha PLG expansion cards.
LED segment display for showing midi activity only. USB/Serial Port/MIDI connectors. Optical output. Has the MU1000/2000 soundmap, but omits some effects and does not have A/D inputs, PLG expansion board slots, or upgradable firmware.
Two AD inputs for guitar or microphone. Effects can be applied to the AD input signal. Box metal chassis with backlit LCD display. Optical digital output, USB and SmartMedia card slot. Built in sampler (4 MB) and sequencer. Includes optical out port (unlike previous MU-series modules), which is also carried over to the MU500 and MU1000.