decimator

Documentation

Overview

given a PCM audio file, convert it to mono and decimates it. Because of nyquist law, we can't simply average or drop samples otherwise we will have alisasing. A proper decimation is needed http://dspguru.com/dsp/faqs/multirate/decimation Decimation is useful to reduce the amount of data to process. Max hearing frequency would be around 20kHz, so we need to low pass to remove anything above 20kHz so we don't get any aliasing.