Filtering Changes and Deviations in Pitch

Hello!

I'm using [retune~ @retune 0 @pitchdetection 1] to detect pitch from an instrument and I've noticed sometimes the pitch of the instrument varies just enough that it detects the wrong pitch, especially during the attack and decay of the played note. I've been trying to figure out a way to filter the output of [change] so that it will only output the detected note if it has been sustained for more than 2 seconds for example.

Appreciate the help in advance,

Liam



[Edit] Here is my progress so far;