modulation shapes

[Paul Perry]

At 01:26 PM 24/10/98 +0200, jhaible wrote:

>I guess at the low turning point a pitch change effect dominates, and a
>sharp corner in the mod signal would cause an unpleasantly
>strong pitch change, while on the high end the filter effect is dominating,
>and a round corner would just make the filter stay too long in a
>rather uninteresing position of the comb filter.
>I would not have found that myself, but once I've read about such a 
>modulation shape, it's quite reasonable. Who did invent it, btw. ?
>
...I do not know, but it might have been 'accidentally' discovered
from the natural characteristics of the early phasers using filament
bulbs driving light dependant resistors.. the LDRs have a 'fast attack slow
decay'
effect in addition to what the bulb does, and the bulb light output is
very non-linear with current also. This combination also naturally
gives less modulation at higher LFO freq, itself a good idea here.

paul perry melb aust (pondering the wisdom of the ancients)