You have heard it in tons of recordings – that vocal that sounds like it’s coming through a radio, all thin and kinda distorted. Here is a video that shows you how to do that in Pro Tools. Though you can do this – or something very close to it – in any recording software using EQ (equalization). Essentially it involves removing most of the frequencies in both the high and low areas, leaving only a narrow band in the middle frequencies, which is what telephone and radio voices sound like to us.
See the video below for how to do it in Pro Tools: