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It is from the audio output of a filter.in your diagram where does the 100nf cap connect to?
The diode will have about 700mV across it.In the oritental circuit he shows only the 22k resistor, the diode to ground.
In Tina simulation it shows only 360mv for bias (I need to remeasure but pretty sure 360mv is close??)
No. The transistors are fine.need to switch around transistors.
The Oriental circuit has the LM3914 directly driving the rows of LEDs with a very low average current. Your circuit has transistors to give a high peak current for good brightness.The oriental circuit has 2 transistors per frequency but this one has 3 (alo of transistors).
got to be a better method??