ramp size

[mdedwards]

It should be possible to change the ramp length on-the-fly (while the object is granulating). For reasons of speed, ramps were originally (and still are) generated for the user-specified length when changed and with the object 'off'. This is speedy because the index into the ramp is simply incremented (++).

This could be improved by generating a single long ramp to be used for all lengths, of the window type requested by the user, then stepping through this using float increments determined by the user-requested actual ramp length. We could linearly interpolate or (faster) merely truncate. The latter would probably not be audible (famous last words?).