Hello. I'm trying to make an LED light to carry sound, in a simple blink-it-like-it-arrives way. The problem is, on the receiving end the sound arrives with a lot of distortions, most apparent in the lower notes. Single tones are reproduced faithfully, but anything more complex sounds like 8kbps mp3 with applause. For the transmitter, i connect the LED to the amplifier output, and use a resistor to keep it lit, so that the actual sound signal is between about half lit and 100% lit. The kind of amplifier does not seem to matter (capacitor at the output is a part of the amplifier). Attaching a speaker in place of an LED produces a nicely sounding speaker, so something goes wrong in the light part. Here is the whole receiver part: Also tried different kinds of amplifiers, but all on the left of the 1k resistor stays the same. Not sure if it is to blame - it reproduces various blinking lights like 1kHz of LED flashlight rather faithfully. What am i doing wrong? How to do this properly? Help please.