Roland TR-909 - Fantastic Condition w/ Professionally Modified Kick and Hi-Hats

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Published on Sep 20, 2017 NolaNola Nolita

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"As you can tell, this is a very specialized version of this classic drum machine. 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. I've posted 5 minutes worth of nothing but these modified kicks on Youtube - this is just the tip of the iceberg. You could literally tinker with variations to the kicks for days.

https://youtu.be/SqpnQhg_U14


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. Youtube video with sounds of the Hi-Hat mods can be found here:

https://youtu.be/JWsx7rVu8GA

More details on the mods can be found here"

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Roland TR-909 w/ Mods

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"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"

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Roland JX10 with Colin Fraser Sysex IC

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via colinfraser.com:

"Like many JX10 owners without a PG800 programmer I was disappointed to find that Roland had made a complete arse of the midi implementation - there is no way to edit sounds via midi.
So I got hold of the service manual and the datasheet for the 6303 processor used in the assigner board, and set about dis-assembling the firmware, in the hope of finding the 'bug' that stopped SysEx sound edits working."

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Roland JX10 SN 684652 with Colin Fraser Sysex Update

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Full details on the update here.

"Like many JX10 owners without a PG800 programmer I was disappointed to find that Roland had made a complete arse of the midi implementation - there is no way to edit sounds via midi.
So I got hold of the service manual and the datasheet for the 6303 processor used in the assigner board, and set about dis-assembling the firmware, in the hope of finding the 'bug' that stopped SysEx sound edits working.

In the process I learned a lot about how the JX works, how the PG800 works, and how NOT to write firmware for a synthesizer. The Roland software engineers must have either been under real pressure to get the job finished, or they simply got the office cleaner to write it, because it is a poorly structured, badly written mess.

When I found the code for SysEx reception there was only a slight hint that they had planned to implement editing via midi, no 'broken' code for it, but with a little thought, I found a way to hack it in there myself..."

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