Tune A4 so that F2A4 = F2Fork

These intervals are partially filtered.

A5 will be audible. Ignore it.
Train your ear to filter it out.
Focus only on the beating of the A4.

Use the A4 and A5 buttons below to focus your ear on the specific beating partials.

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You need to get 100% (i.e. within 0.5 cents) to go to the next lesson.