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rhythmic percussion? I think that's very poetic :)

I thought it was.....I thought of the waves as strings of "something" then I remember the sound and thought of percussion....then rhythmic. So it goes with the sound and feel of the photo.

very good auditory image

oh thank you! I guess I hang out with nerdy wordy people.

yeah, you should avoid hanging with losers - it'll ruin your reputation (Paddy Chayevsky - Marty) lol