- SOPRANOS -

To play, press and hold the enter key. To stop, release the enter key.

 - ALTOS -

To play, press and hold the enter key. To stop, release the enter key.

 - TENORS -

To play, press and hold the enter key. To stop, release the enter key.

- BASSES -

To play, press and hold the enter key. To stop, release the enter key.