The Multiband AGC section has two primary functions.
The first is to build RMS energy which increases perceived loudness and delivers a more "processed" sound when compared to the original source material.
The second is to provide spectral consistency to the processed audio. This is often called the "sonic signature" of a stream or station. Songs that are bass-shy (think 70's rock) receive a boost in the lower frequencies. Songs that are overly bright (think synth-heavy 80's pop) get their top-end smoothed out.
Band Energy (B1 – B5): The primary method of achieving a particular frequency balance of the Multiband AGCs. Higher settings result in higher output levels from that band.
Per-Band Compression Boost: Available by expanding the "More" menu, these controls adjust the drive and activity of the Multiband AGCs on a per-band basis.
(2).png?sv=2022-11-02&spr=https&st=2025-03-16T12%3A21%3A08Z&se=2025-03-16T12%3A32%3A08Z&sr=c&sp=r&sig=z%2BMrkIJuY0i5xOIDSYjZa0HYySKiOFz20RjTOEvjotw%3D)
Figure 1 - Multiband AGC controls