Sound-activated LED lights using NPN transistor

What is wrong with the multi-colored LED light? Is it real?

I have started experimenting with transistors. The amplified AC sound signal forked from the speaker (connected to the base) is enough to turn the transistor on.  The supply voltage is connected to the LED onwards to the collector and a resistor  is connected to emitter (connected to ground).

I had some strange clear transparent LEDs. They turned on when on of the signal was connected to the collector but they did not react to the speaker signal. Stragely, one of the LEDs started glowing in all sorts of colors.

UPDATE: The clear LEDs are RGB LEDs. They follow their own (color) switching rhythm and are unsuitable for being sound-reactive.

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