For example, most audio signals are dithered prior to distribution. However, if a low or high pass filter is introduced after dithering or during playback, won't that negate some of the benefits of dithering? Is there any way of calculating the magnitude of the effect?
Many lossy audio encoders automatically cut around 16-18kHz. On a 48kHz signal, that's a good ~25% of the bandwidth gone, wouldn't that have a noticeable effect on the dither, and therefore the signal too? especially if there is noise shaping pushing more dither into the high frequencies?