I never thought I'd be posting a filmstrip on the blog, but here you go: Pathways To Music, Part One: The Birth of Electronic Music (mov file for download). This is part one of the series - if you know where part two is, let me know. This installment covers "electronic" music from 400 BC to 1950, including analog techniques such as the "soundhouses" of the 17th century (pictured at right) to the glass harmonica, before finally moving along to early electronic instruments such as the Dynamophone and the Ondes Martenot. And the case is made that DJ Paul Hindemith was the first turntablist of all time, yo!
UPDATE: Here is part two (MP4 file), via GetLoFi. Thanks, Tony!