https://vi-control.net/community/threads/what-is-the-formula-for-this.3978/
https://www.native-instruments.com/forum/threads/calling-nicki-marinic-or-other-scripters-good-at-math.37073/#post-233780
These are the only real discussions I could find on this topic, and they're from 2006. Basically I need the percent value (0-800%) that's set with the speed knob in TM2 mode. I need this value because I need to determine how long it takes for a part of my sample to play. Approximations won't work for my needs -- even a few milliseconds of error could be a problem. What is the current best solution for this? Has anyone ever figured out the formula(s)? If not, is the lookup table given in that forum post the furthest anyone has gotten? I figured I could have my speed knob snap to whole percent values and then look up the 0-1000k value to send to the real speed knob. The lookup table in those threads starts jumping by 10 at 150.
https://pastebin.com/raw/MSXs19gm