Originally Posted by: CSchlegel
BTW - I've never heard conclusively why Leo decided to use the term tremolo (changes in volume, attack or velocity), when it's actually vibrato (changes in pitch) that the system achieves.

...And used "Vibrato" to label the amp's tremolo effect. He completely interchanged the two. I think he just mixed them up one day, but the ad was already printed and it was too late! :)