Comments for Blog Review 582 at http://www.adamsmith.org , comment 1 to 1 out of 1 comments http://www.adamsmith.org Thu, 20 Nov 2008 17:42:04 +0100 FeedCreator 1.7.3 http://www.adamsmith.org/blog/misc/blog-review-582-200804291306/#comment-120 Quote: "A fascinating experiment: what did Robert Johnson really sound like?" The 'speed' of 78 RPM for a shellac record was, in the early days, only an average over that issuing from a range of record companies. Later on it was indeed adopted as a standard. This early variation is one of the reasons that speed controls were present on early record players - that is, to accomodate the different record companies products. Mind you, the 20% difference mentioned in the original link does seem large. - Steve Giess Tue, 29 Apr 2008 19:21:28 +0100