Sunday, April 02, 2017
Roland TR-909 w/ Mods
via this auction
"This 909 contains modifications (thanks to Colin Fraser) to the kick as well as the high-hats, to give you far more flexibility that what is traditionally offered by a typical 909. The mods to the kick are the group of three rotary controls above low/mid Tom controls. As you can see, the same rotary knobs that were on the original were used on the mods. Mods to kick add three new controls:
- Pitch: controls the frequency of the bass drum oscillator
- Drive: allows waveform adjustment from normal to square, for hard clipped sounds
- Tune Depth: varies the amount of the initial pitch sweep (decay is set by TUNE control)
These mods literally give the 909 the ability to produce any kind of kick imaginable, from overdriven, to deep, pulsating kicks.
The hi-hats mod gives a tune control for the hi-hats that functions the same way as the tune controls for the crash and ride cymbals. This adds a lot of depth and flexibility.
More details on the mods can be found here"