23 Apr
2024
23 Apr
'24
12:16 p.m.
On Tue, Apr 23, 2024 at 10:47:43AM +0100, Marco Castorina wrote:
> for each output sample you use a new filter from
the set of 128 by
> incrementing the index by a fixed value. This may not be an integer,
> so you need to round.
This is what I am struggling with: how do I determine
by how much to
advance?
It depends on the inverse of the resampling ratio, R = Fin / Fout.
Note that all filters have the same frequency response, they just
provide a different delay in the range of 0 to 1 input samples.
Let P be the position in the input stream where the center of the
filter has to be.
For each new output sample P increments by R.
The integer part of P determines what should be first input
sample. The fractional part determines which filter to use.
Ciao,
--
FA