Analog VU-METER for audio equipment

This schematic is used in one of the mixing decks and the circuit is exactly, with all the nominal values of the elements transferred to a new, separate board. Please note that a split source of +15/-15 Volts is used to power the device.
Two red led`s show peak levels,  yellow led`s - middle (4 level), main section - green led`s - 7 levels. One blue led LD13 it is power indicator. It can be mounted both on the board and separately by connecting wires. Blue led is a part of circuit, cannot be removed.

UPD: 22 Nov 2022, tested, working fine. If any LED`s is not glow - check LED`s!