A PD patch was used to take further measurements of the modulation depth (in semitones) produced by various changes in PMS and PMD, with a flat pitch envelope settings of 10 and 90. The graph ENV.ps in the attached file shows a perfect correlation between the two sets of results, indicating that the pitch envelope parameters are independent from the LFO output.
The patch was then used to take timing measurements for the LFO delay. Time snapshots were taken at the point where the signal deviated by more than +/-10 cents from 880Hz, and at the point where the maximum frequency (+/- 11.5 semitones) was reached.