Question 1

What range can it play?

Accepted Answer

20 Hz to 20 kHz — the usual limits of human hearing. What you actually hear depends on your speakers or headphones; most small speakers give up well before 50 Hz.

Question 2

Is it safe for my ears and speakers?

Accepted Answer

Keep the volume low, especially with square and sawtooth waves, which carry far more energy than a sine at the same level. Never hold a loud high tone.

Question 3

Can I use it to tune an instrument?

Accepted Answer

Yes — set the frequency to the note you want and match it by ear; the nearest note name is shown under the field. For a reading instead of a reference, use the tuner.

Frequency generator — any tone, any waveform

Questions