Mathieu's mission is quite a task: defining music and its effects is, at once, both so objective and so subjective. 'Bridge of Waves' begins its journey from within and captures the inherent rhythms and patterns that coarse through one's veins both literally and figuratively, and I rather enjoyed how discussion of pulse and harmony enhances our listening. And, crucially, the need for silence ('silent' as an anagram of 'listen'...) The mathematics and gravity of tonal harmony and how it influences mood and emotion particularly resonated in his earlier chapters. The importance, also, of Machaut (who I had to spotify), Bach and Mozart through to Mathieu's go-to C20 paragon, Miles Davis, were further highlights in his 'Music as Story' chapters. However, I did find his dwelling on the spiritual - the 'Zen Elevator' - dislocated the journey somewhat and I found myself wanting to return to the entymology of music's wonderful wordless language. Well written, notwithstanding the transatlantic ego seeping through on occasions, and an honest exposé of a world for which he cares most deeply. Glad I've read it. And glad to have returned to middle C...