Note On Pitch “yip” with quantize off – Page 2 – Roger Linn Design Forum

From memory the sensors in the LS take a time to stabilise, the code uses a certain time period to get a “correct” value. There has been a lot of talk on the forum about this time and the pressure value. The firmware I guess could be changed to minimise this time at the cost of accuracy and also delay the note on until the values have been calculated with the cost of higher latency.

Another thing is that most synths smooth/lag pitchbend over a period of time, you can test this out with a DAW, draw in a square wave PB and listen to the synth. This is really annoying with midi guitars where pitchbend can be used instead on a note on when a previous note is playing on the same string.

Might be worth checking this out on the synth you are using and seeing if the yips are still there, maybe the majority of yippiness is coming from the smooth/lag in the synth.