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This instrument is The Minitron.
Built in the 1970s by Norm Lederman of Oval Window Audio, it was actually a Graduate Thesis project, designed to illustrate the principles of tape-based loop technology. A complete user's, design, and technical manual exists with the keyboard, written by Norm. After being used by Norm for a quarter of a century, Craig Patterson and PME Records bought the monster, which is the only one of its kind in the world. On first glance, it shares some ideas with the Mellotron, but the Minitron goes the Mellotron one better in a number of categories:
The Minitron consists of 48 keys in a slideout keyboard (which stashes away for shipping). Each has its own individual attack, release, and volume controls. These controls operate six broadcast cartridge tape drives, each having eight tracks. Thus, each of the tracks on a cart contains the tape loop for one key.
Since these loops are real tape loops, they are played continuously, with no start or end point. This means no tape rewind when the note stops, and the length of the "sample" is limited only by the cartridge's length, which can be up to forty minutes. This makes not only for unheard loop points, but also means that since you don't know where in the loop you'll be playing when the key starts, the Minitron is perfect for atmospheres, pads, and background beds. As the sound designer knows, these sounds repeat noticeably if less than several minutes long, and are difficult to use, since most samples start at the beginning of the recording. With the Minitron, the "beginning" can be anywhere in the loop.
There are eight jacks on the upper left hand corner, to facilitate the recording of your own loops. (Only the first cartridge is record-enabled.) And since there are only six carts, which each pull out at any moment, the entire tape rack can be changed in 30 seconds, with other notes playing while carts are taken in and out! Try that with a Mellotron!
Norm and Craig have pondered the notion of transferring this technology to the digital domain, but they are not aware of reasonable-cost technology which would allow the continuous playing of 48 tracks, each 40 minutes long. Thus for now, PME will have to be satisfied to use the keyboard in its present state, with a couple of suitcases full of sounds.
Several of our artists have used the Minitron in last several years. It takes a little maintenance, because of the mechanics, but it's really no big deal. And if anyone is interested in helping us put together a viable commercial product, we'll be happy to talk with you, although appreciation of the instrument, not money, would be our motivation. This keyboard is but one of over 100 in PME's collection. If you'd like to know more about this or any of our other classic keyboards contact Craig at .
And if you'd like to talk to Norm about the incredible Induction Loop Assistive Listening Systems he's pioneering right now, e-mail him at: info at ovalwindowaudio dot com, or visit Oval Window Audio on The Web.