Filter banks drive equalization, audio coding, and spatial reproduction

Evidence

Filter banks have a number of uses. For example, when used as an equalizer, the signals in sub-bands are amplified according to the desired equalization curve, and they are then combined to form the equalized signal. Since sometimes perfect reconstruction is desired, the filters must be designed so that the original signal can be recovered when the sub-band signals are combined. Filter banks have various applications in audio effects, audio coding, and spatial audio reproduction, as will be discussed later in Chapter 15. — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 398

Categorization

• ADDENDUM: Filter-bank sub-band manipulation is exactly the mechanism behind how ‘equalization’ shapes sound — relevant background for the technical side of acoustic-infrastructure worldbuilding.
• corroborated: 2 independent passages support this claim — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 398