5+1 led vu-meter with AN6884

AN6884 is 5-dot led driver circuit with logarithmic scale (dB), who can be used in this configuration:

I made a quick test montage:

Also, I made AN6884 on test board movie:

I want t add extra chanel for pause or negative sound, so I change the schematic:

Because leds are controlled by current generator, I change a lot the schematic for control additional led thru usual optocoupler:

I madeĀ 5+1 LED VU-meter with AN6884 and PC817 movie to see how this vu-meter works:

For delay reaction of extra led, I put a electrolitic caapcitor between colector and emiter of optocoupler transistor:

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