Roland published this article about the TR-06.
From a couple weeks ago, but a very good read.
It looks like the ACB model in both the TR-06 and Roland Cloud TR-606 is an evolution of what was found in the TR-8. Modified by the two engineers who worked on this new TR-06:
HN: That’s the new AIRA flavor.
AN : They are both based on the same ACB model designed by a key engineer of ours. The 606 was originally created by him during TR-8 development. We modified it.
HN : What we wanted to do, of course, is keep the authenticity of the 606. We changed the hi-hat algorithm and added more of a “clipping” sound. This made the hi-hat more “real” and more “606.” We also added a feature where the hi-hat changes decay with the tempo. This means the hi-hat sound gets “crispier” as the tempo increases.
From the bottom up, we tried to make the 606 very musical. I love the TR-8. I wanted to combine the TR-8’s functionality with the portability and authenticity of the 606. That was the sound-shaping concept.
How similar does it sound to a vintage TR-606? Is everything set at default or is a little bit more pumped up?
HN: We created the sounds based on a coworker’s actual TR-606. It was our model. I listened to the sound of his 606 all day for a month to develop the new hi-hat.