Some people label Non-Chord Tones as NCTs, melodic decoration, non harmony note, etc....
Basically, they are the same meaning. Non-Chord Tones are notes that not belong to the chord.
You can add NCTs to make the melody more interesting and add tense to it, so that it doesn't sound booooooring....but too much NCTs will sound complicated. Dear students, make sure don't overdo it, yea..
Below are the different types of NCTs:
For Gd 6 ...
1. Passing note.... approached by STEP and left by STEP IN SAME DIRECTION
2. Auxiliary note....approached by STEP and left by STEP IN OPPOSITE DIRECTION
3. Changing note (Escape note)... characteristic NONE of above no.1 & 2 , on WEAK BEAT
4. Appoggiatura...characteristic NONE of above no.1 & 2 , on STRONG BEAT
5. Anticipation... approached by STEP or LEAP, left by SAME TONE
Gd. 7
6. Suspension... approached by SAME TONE, left by STEP DOWN
7. Retardation...approached by SAME TONE, left by STEP UP
Gd.8
8. Pedal point (tonic or dominant)..usually occurs in the BASS, a stationary pitch that begin as a chord tone, then becomes NCT as the harmonic change.
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