Originally Posted by alparrott
In the sense that all sounds have pitches, sure; but I would classify most sounds as either tonal (melodic) or percussive (rhythmic).
You can make a rhythm out of one sound, with practically unidentifiable or indistinguishable tonal properties. But my point is, melody is composed of tones (notes) set to rhythmic structures.
99.9% of the time, correct.
Some new age music, often refereed to as space music, is often pretty absent of rhythm. Melodies flow into each other with out any set rhythm. But it's clearly more of en exception.