I'm trying to smooth a signal in order to reduce white noise as a result of changes in amplitude across sequential frames of an audio signal.
I've been investigating using a moving average or boxcar filter to help minimise the issue. In my investigations it would appear normal implementations of a boxcar filter only smooth the contents of a single frame/buffer of audio.
Can a boxcar filter be implemented in order to smooth the transition across frames as well? or is there a better approach?