[PD] bit crusher abstraction

[Roman Haefeli]

On Thu, 2010-04-29 at 16:47 +0200, Roman Haefeli wrote:
> On Thu, 2010-04-29 at 16:15 +0200, tim vets wrote:
> > there's a very simple way do do 'sample rate reduction' (which is i
> > think the sound you're looking for)
> > [readsf~]
> > |                [phasor~ 100]
> > |                / 
> > [samphold~]
> > |
> > instant lo-fi gratification :)
> 
> This is a crude way to reduce sample rate, but not quite so to reduce
> bit depth.
> 
> I say crude, because if the frequency of the phasor~ is not a dividable
> whole number of the sampling rate, it will additionally add some jitter
> (which even enhances the lofi effect).
> 
> Reduced bit depth (which is what I think 'bit-crushing' means)  can be
> achieved by dividing the signal by x, pass it through something like
> [int~], multiply it by x again. An [int~] can be implemented by using
> [wrap~] and [-~], which are both vanilla.

As mentioned in Martin Brinkmann's previous mail and assuming x is a
number greater than 1, it would make more sense to multiply first and
divide after.

Roman