M61530FP

Main volume control ........... 0 to −87 dB in 1-dB steps, − Four independently controlled volumes (SL, SR, C, LFE)
Low pass filter (LPF) .......... On-chip operational amplifiers for configuration of post-filters through the addition of  external C and R elements
AGC......................................AGC circuit is included to prevent clipping <SW ch>
Bass boost...........................HPF type, with on/off switch <SL/SR ch>
Output gain control..............0, +6, +9, or +12 dB (four steps) <SW ch>
Input gain control................0, +5, +10 dB (three steps) <FL/FR ch>
Microcomputer I/F................Two-line serial data control

The M61530FP is a four-channel volume IC which is optimal for combination with the M61519FP two-channel
electronic volume. A multi-channel system is easily configured with the aid of these two chips.