The Eventide Harmonizer is an utterly legendary early digital effect box. Tony Visconti had the second one in Europe, and used it on David Bowie's 'Low' to make huge drum sounds. When David asked him what it did, he said "It fucks with the fabric of time." They come up all the time on US Ebay, selling for $700-1000. [link]
Posted by Tom Whitwell. 
