This is an old EKG storage/transmission system. The hospital I worked for used a PDP based MUSE system for receiving EKG's from distant country hospitals which did not have the staff for a local EKG interpeting doctor. There was also a way to poll distant EKG machines, which is how I came to be involved with the system at the time. I was responsible for our call detail recording software and found that our MUSE was dialing a distant long distance number several times a minute for days straight. Marquette (a Milwaukee WI based company) was bought out by GE Medical several years ago. The current generation MUSE systems are typically an unholy alliance of OS/2 and NT servers bundled together. I was hoping to get my hands on the PDP MUSE at our site but it disappeared too quickly. Paul On Sun, 16 Apr 2000, Zane H. Healy wrote:

I have one of the original Triadex Muses's - obviously quite different from the DEC unit. A description of it from Hal Chamberlin's book The Musical Applications of Microprocessors THE MUSE (as described in Hal Chamberlin's Book) Thirty-eight different digital signals are generated by several counter stages and a 31-stage shift register. These signals, along with constants 0 and 1, are connected to 40 signal rows. Eight 40-position slide switches, divided into two groups of four, act as columns and can connect to any individual row signal. Four of these switches, which are called THEME controls feed a parity generator, whose output feeds the 31-position shift register. The other four switches, designated INTERVAL controls, are connected through some translation logic to a 5-bit DAC, which drives a VCO tone generator. The VCO and DAC are adjusted so that the step size is a semitone on the equi-tempered scale. The translation logic converts its 4-bit input into 5-bit output according to the conventions of the major musical scale. An adjustable low-frequency oscillator clocks the counters and shift register. The rows driven by the counters and constants 0 and 1 are designated as the "C" (counter) region. Five of these rows are connected to a simple 5-bit counter, while two more connect to a divide-by-6 and a divide-by-12 counter. The outputs of the various counts are normally used for short, highly ordered, sequences. For example: if the "A" switch is set to row "C1", B to C2, C to C4 etc., the device will generate an ascending major scale. Essentially, a binary counter has been connected to the DAC, which would be expected to generate an ascending staircase waveform. If switch A is moved to the C? position, the scale will still ascend, but by alternate intervals of one note and three notes. Moving D and B back to the OFF position (contant 0 row), results in a pair of trills: C-D-C-D-G-A-G-A-C-D... Many other combinations, opf course, are possible, but the sequence length will never be more than 64 notes using the C6 row, or 32 notes otherwise. The 31 rows in the "B" (binary) region are driven by the 31-stage shift register, which shifts downwards from row 1 to 2 to 3 etc. The four THEME switches are used to control the shift register by determining what will be shifted into the register's first stage input. If they are set in the C region, then the register acts merely as a delay line. This can be useful in creating canon effects. However, if one or more are set in the B region, then a feedback path into the shift register is created and complex sequences can result. One possibility is to set the THEME switches for a complex sequence, set three of the INTERVAL switches in the C region for a repetitive tone pattern, and set the fourth somewhere in the B region. The result is that the repetitive pattern is modified according to the shift register pattern. The number of unique combinations is, for all practical purposes, infinite. There are two software simulations available - sorry, don't have the URL's anymore - ANKLUND and Muse11. Muse 11 is quite good - I haven't tried ANKLUND. It's a fun thing to play around with - came out in the early 70's I think, so it's quite on-topic. Noteworthy (pun intended) is that one of the creators of the original Muse was that-famous-AI-guy-at-MIT (damn, I gotta get my memory refresh rate increased again!) Bob Stek Saver of Lost SOLs -----Original Message----- From: owner-classiccmp(a)classiccmp.org [mailto:owner-classiccmp@classiccmp.org]On Behalf Of John Allain Sent: Monday, April 17, 2000 1:03 PM To: classiccmp(a)classiccmp.org Subject: RE: Marquette "MUSE"--DEC mini/file server circa 1986-88 A friend of mine told me a while back that he had seen a thing called a 'Micro (or mini) Muse' a few years ago at a trade show. He said it was doing music synthesis and that it attracted quite a crowd. Could this be related? Sounds like the "macro" MUSE was doing AD/DA, such a thing could be used to make a synthesizer demo... Anybody? John A.

Try http://richter.simplenet.com/muse.html don't know, but wouldn't be surprised. Marvin Minsky Bob