>The curve won't have a continuous derivative, which may sound weird if the >curve is played slow enough. If ever your solution is not sufficient, it >might be better to try to come up with the integral of some continuous >function, but it may be a bit hard to make it align with the desired >frequencies.
>for wide vibratos, it's also important to ask yourself which scale you >want to work in: linear vs logarithmic sound different for any >sufficiently wide vibrato. > [osc~ vibrato_rate] > | > [expr~ ($v1>0)*$f2*$v1+($v1<0)*$f3*$v1] how about? [expr~ ($v1+1)/2*$f3*$v1-($v1-1)/2*$f2*$v1] It's cheap/quick, but it has the continuous 1st derivative you mentioned... I just tried it and it sounds alright.... doesn't do anything too weird/unexpected :) Also, it doesn't change the location of the zeros, or otherwise affect the duty cycle of the thing. The two parts ($v1+1)/2 and -($v1-1)/2 are just mixing functions that always add up to 1. There's probably lots of variations that would work as well or better, while still being continuous. _______________________________________________ [email protected] mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
