Yamaha DX100 (synthesizer)

Yamaha DX100
Manufacturer	Yamaha
Dates	1985[1]
Price	£349 GBP $445 US
Technical specifications
Polyphony	8 note
Timbrality	1 part
Oscillator	4 sine wave, (4 operators, 8 algorithms)
LFO	1 (Sample & Hold, Saw Up, Sine, Square, Triangle, Delay, Key Sync)[2]
Synthesis type	Digital FM
Filter	None
Aftertouch expression	Yes[3]
Storage memory	192 ROM patches, 32 RAM patches.
Hardware	HD63803XP (CPU), YM3014 (DAC), YM2164 (FM synthesis chip)
Input/output
Keyboard	49 mini key
Left-hand control	2 wheels for pitch and modulation
External control	Breath controller, MIDI In, out, thru, footswitch,

The Yamaha DX100 is an FM synthesizer released by Yamaha in 1986.^[4][5][6] It offers four operators for each of its eight voices, and has eight algorithms (compared to the DX7's six operators for each of its sixteen voices, and thirty-two algorithms). It has only 49 mini-keys, and no arpeggiator or effects, but is still useful, known in particular for its bass patch #1. It features up to 192 presets, seriously improving the DX7's limited preset capabilities. It can also store 24 user-programmable sounds in RAM. It lacks cartridge support, but voice patches can be saved to and loaded from an external cassette recorder.

It was the cheapest user-programmable FM synthesiser made in the 1980s, leading to its popularity even amongst professional musicians in the 80s and 90s. It's essentially a cut down version of the DX21 and DX27, using the same FM chip, the YM2164.