From the integrated Help:
Quote
Record MIDI with the Playalong WIzard Feature

This is a very helpful feature if you don’t have a MIDI keyboard but you want to record with a "live" feel. Use the Wizard to record notes from the computer’s QWERTY keyboard for a track that’s more natural than step time. Here’s how it works.

1. Click on the [MIDI] toolbar button and check the MIDI Keyboard Enabled menu item.

2. Press Ctrl+R keys to record.

3. As the song plays, play the melody on any keys on the bottom two rows of the QWERTY keyboard, in the rhythm of the melody. The "wizard" notes won’t be the correct melody of course, but don’t worry about that as you record. When you’re finished, look in the Notation window. You will see the wrong notes in the right places with the correct durations.

A S D F G H J K L ; <<< This row plays PASSING tones (second, fourth, sixth)

Z X C V B N M , . <<< This row plays CHORD tones (root, third, fifth, seventh)

4. Drag the notes (with the left mouse button) to the correct place on the staff. You will hear the notes play as you drag them, and the names will show in the note name box. For sharps, flats, and naturals, hold down the Shift key, Ctrl key, or Alt key respectively. You will end up with a melody that sounds like it was recorded live, without the rigid feel of tracks entered in step time.

[Tip: If you have the Wizard "On" the spacebar won’t stop playback. You need to press the Esc key to stop playback when the Wizard is on. This is to prevent stopping the song if you mistakenly hit the spacebar while playing the Wizard.]

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