The strictness of tuning can be adjusted in three steps. Start with EASY, and when you've gained more skill, increase the difficulty to MEDIUM and then HARD for further improvements to your pitch accuracy.
A must-have item for those without a sense of absolute pitch, the sound out function generates a specified reference tone. This is convenient when practicing songs that begin with the vocal, and you can also use this to improve your relative pitch on your own by repeatedly listening to a reference tone and then singing the same pitch.
Like the sound out function, the sound back function helps you improve your sense of pitch on your own by outputting (from the headphone jack) the reference tone that's closest to the pitch of your vocal input. The reference tone together with the tuning guide LEDs let you train using all three senses: eyes, ears, and mouth.
* Available only when headphones are connected.
