New free ebook: Spectral Analysis of Scales

There's a brand new entry in my series of free eBooks: Spectral Analysis of Scales. This one's a bit more technical than the others, but I think it'll be of interest to advanced musicians looking for a way to expand their vocabulary of scale and arpeggio ideas a little more easily. It's completely free, so download it and spread the word. This is the first edition, so as always please send me any errors you find!