Some examples of songs that use dissonance and outside-the-key notes effectively include:

- "Purple Haze" by Jimi Hendrix: The guitar riff in the song makes use of the flat fifth, which creates a tritone interval that is highly dissonant and creates a sense of tension.
- "Bohemian Rhapsody" by Queen: The operatic section of the song features a chord progression that includes an augmented chord, which is made up of two major thirds and creates a highly dissonant sound.
- "The Man Who Sold the World" by David Bowie: The guitar riff in the song makes use of a flattened seventh note, which creates a sense of tension and dissonance.
- "Tomorrow Never Knows" by The Beatles: The song features a drone-like sound created by a single chord, and includes elements of Indian music that make use of dissonant intervals and unusual scales.

These are just a few examples, but there are countless songs that make use of dissonance and outside-the-key notes to create interesting and unique sounds.
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