{"product_id":"harmonograph-a-visual-guide-to-the-mathematics-of-music","title":"Harmonograph: A Visual Guide to the Mathematics of Music","description":"Brand New From Reputable UK Company With 30 Years Experience In Retail, Please Note Not All Our New Items Are Shrink Wrapped.\u003cbr\u003eAll items shipped within 3 working days of payment.\u003cbr\u003ePlease note that all our DVDs are Region 2.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003eIn this charming little book Anthony Ashton uses a Victorian device called a Harmonograph to tell the story of Harmony and the intervals in the scale. With useful appendices and exquisite line drawings this is a unique and original introduction to this magical subject.","brand":"Chalkys.com","offers":[{"title":"Default Title","offer_id":49042157732162,"sku":"1222384","price":9.98,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0056\/8043\/1219\/files\/61ujNiEZ4hL._SL1500.jpg?v=1718315473","url":"https:\/\/chalkys.com\/products\/harmonograph-a-visual-guide-to-the-mathematics-of-music","provider":"Chalkys.com","version":"1.0","type":"link"}