Perhaps you can fade in and out the LED using a PWM signal. i.e 30 000 Hz . Then you can make a soft on - soft off function that might work. At some frequency you have passed what the ear can hear and the amplifier can amplify.
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Pwm
Perhaps you can fade in and out the LED using a PWM signal. i.e 30 000 Hz . Then you can make a soft on - soft off function that might work. At some frequency you have passed what the ear can hear and the amplifier can amplify.
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