This is going to be a quick little informative tip:
In the past, we have talked about how the use of power chords can create ambiguity between the key possibilities because there is no third voiced to tell if it is major or minor.
In a similar fashion, using your tonic (or at least opening chord) as a sus4 or sus2 chord that gives you a “triadic” harmony without the third present can also aid in creating that key signature ambiguity while giving the harmony some color with the suspended notes.
Try using it as a tonic chord and experiment as to how you can resolve it in surprising ways.
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