Yamaha DX9

The DX9 was a not-so-special spin off of the aggressively popular DX7. The DX9 wasn't a great synth, it had all of the headache problems associated with its DX7 relative. Difficult programming and limited MIDI implementation to name a few. Still, it is a 4-operator FM synth like the other DX synths and is capable of interesting sounds.
In the mid eighties when the DX9 appeared it was a welcome cheap alternative to the DX7. But current DX7 prices have nearly hurled the DX9 into obsoletion. Also, unlike the DX100 which is famous now for its gritty house-bass sound, the DX9 doesn't have any particular sounds that set it apart from other synths like it.
- Specifications
- Polyphony - 16 voices
- Oscillators - Digital 4 operator FM synthesis
- LFO - Standard modulation
- Filter - None
- VCA - ADSR
- Keyboard - 61 keys
- Memory - 20 patches
- Control - MIDI
- Date Produced - 1983
- Websites of Interest
Yamaha Synthesisers Lots of history, info and links.
- Resources & Credits
Images from Synth Site.
Errors or Corrections? Send them here.

Luckily I got some of the other FMsynths of that era as well, so this buy was just to complete the collection..
Some sounds were OK - don't pay much for one if you do buy.
I don't know the secret, perhaps it is an advantage of the technical limitation. Compared with DX7 the distortion by Feedback value 6 or 7 is earlier, you can get more sharpness in sound.
I bought my DX9 in 1985 for 750€ (=1500DM, DX7 was by 2000€ in that time), 1987 i bought the TX81Z and two years later a used DX7.
I had spent a lot of time with FM-synthesis and trials to rebuild my favorite custom made sounds from DX9 to DX7 or TX81Z. By about 50% it was no problem, but there are some special patches i never got exactly in shape. A reason for still keeping the DX9!
Besides, with FM synthesis at least one can program their own sounds, and not have to be stuck with the same presets, like on so many of today's keyboards. It makes a better option for those who wish to create teir own presets, and isn't as bad as everyone claims.