Unable to specify sound interval in frames

OS : Win7-32b
PsychoPy version (e.g. 1.84.x): 2020.1.3
Standard Standalone? (y/n) If not then what?:y
What are you trying to achieve?: Evaluation

What did you try to make it work?:
It is possible to select “frame N” for a Sound’s Start property, but not for its Stop property, which can only be specified in seconds.

What specifically went wrong when you tried that?:
Furthermore, attempting to use a “frame N” Start property does not produce the correct result, the sound always has zero duration.