From the recording True Story

<p><span style="font-size: medium;">The mouthbow plays the harmonic series... the notes 1,3,5 and 8 of the major scale are most prominent and these are the notes that we usually hear at the beginning of a song to set the key or the fundamental tone the song is built on, in our minds.</span></p>
<p><span style="font-size: medium;">So, you're sitting there in the dark playing with these notes and out pops a familiar tune... huh? oh Wow, that's cool... I wonder if I can find a way to play the rest of it. Mouthbow is so weak, it might be hard to recognize the tune unless I put some words to it...</span></p>
<p><span style="font-size: medium;">The story I learned in grade school, music appreciation, was that Ravel was lying in bed in his hotel room in Paris. It was late at night, but close by a new skyscraper was being built and they were working on the steel framework. Ravel could hear the sounds of steel girders clanging against each other and the riveting never ceased.&nbsp;</span></p>
<p><span style="font-size: medium;">He heard harmony and dissonance in the clanging steel and a rhythm in the riveting.... Finally he got up and wrote it down.</span></p>