I’ve found on old thread from 2012 about Information passed from Audacity to Nyquist. Has anything come from it?
This problem (about manually deleting the scratch data) would have been solved with the proposal to pass on the info about the first selected track. Similarily my problem with a display after every track instead of only once at the end would habe been solved with an info about the number of selected tracks (it would also serve a solution to the scratch problem).