Listen to this audio file:

It is an encoding of a 6-letter word using

In this example, we use four different frequencies to represent the pairs of bits 00, 01, 10 and 11. The lowest frequency (low pitch) represents 00, the next frequency represents 01, the next frequency represents 10 and the highest frequency (high pitch) represents 11.

The duration of each bit is 0.5 seconds, and the frequency is constant during each symbol (00, 01, 10, 11).

Listen to the audio file and write down the sequence of symbols. Then, decode the sequence using an ASCII table (8 bits per character). Tip: the first symbol you hear represents the leftmost two bits of the first character.