OWNER'S MANUAL

1. GENERAL
   Warranty
   Scope of Supply
   Technical Remarks
   Preface

2. HOW TO USE
   CONNECTING THE UNIT
   HOW IT WORKS

3. TECHNICAL SPECIFICATION

4. WALDORF SOFTWARE

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1. GENERAL (Copied from Midi Bay Manual)

WARRANTY

Waldorf Electronics warrants for M4U for a period of
6 months. This applies solely to flaws in material. Any
claims can be made within this period only. Damages,
consequential damages and costs directly or indirectly
resulting from use of this product or product failure are
not covered by the warranty.


SCOPE OF SUPPPLY

Please check the contents of this package for completeness
and perfect condition.

- M4U
- 9 V DC Power Supply
- Owner's Manual (what you are reading)


TECHNICAL REMARKS

Only high-grade and tested components have been used
for the construction of M4U. When putting the unit
into operation the general guidelines for operating
electrical devices must always be observed. In order
to avoid lengthy and expensive repairs you should give
M4U the same care and attention you give the remaining
components of your MIDI system.


In particular you should ensure that ...

- M4U is never exposed to strong vibrations, dust
  or extreme humidity.
- the correct voltage (9 V DC) is supplied and nothing but
  the power plug, MIDI cables and if neccessary a SUB D 25
  (male) cable is attached to M4U.


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2. HOW TO USE

M4U is an interface, that enables you to read and write
MIDI with your RS 232 port.


CONNECTING THE UNIT

First connect M4U's RS 232 port (SUB D 25, female) to your
computer. If your computer has the appropiate plug, you can simply
connect M4U without using any cables for that port.
Should your computer have a 9 pin serial port, you will
need an adapter or an appropriate cable.

Then connect the MIDI IN and MIDI OUT jack to the MIDI OUT
and MIDI IN (respectively) of your musical equipment.

Plug in the 9 V DC power supply. The MIDI IN and MIDI OUT LEDs
should blink and the ON LED will stay lit.

Now you are ready to go.


HOW IT WORKS

M4U should now be able to receive MIDI information from
your musical instrument.

The information is then passed to your host computer via the
RS 232 port.
The serial port of your computer must be configured as follows:
- 38400 Baud
- 8 Bit
- 1 Stop Bit
- No Parity
- RTS/CTS

(Technical remark:
 A 1024 byte buffer compensates for delays that might occur if
 your host computer is busy and sets the RTS-signal to low.
 In the other direction a 512 byte buffer reduces communication
 between your host computer and M4U).

The reverse direction works in analogy. A MIDI application sends
MIDI bytes to the serial port, where they are received by
M4U and sent out to the MIDI OUT jack with a lower baud rate
(MIDI uses 31250 baud).


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3. TECHNICAL SPECIFICATION

Size:           6.8 cm * 3.5 cm * 11.6 cm
Voltage:        9 V DC
Connections:    DC connector
                MIDI IN
                MIDI OUT
                RS 232  (female)


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4. WALDORF SOFTWARE

   UNIX

   There is a Midi Monitor that runs under X11 available in our
   archive (distributed with the Gnu Public Licence) called xmm.
   This can be obtained using our mail server:
   # mailx arcserv@waldorf-gmbh.de
   # Subject: (not used)

   # HELP
   or
   # LOCATE xmm
   or
   # SEND ./waldorf/xmm/README
   # SEND ./waldorf/xmm/1.0.tar.z


   MS WINDOWS

   Currently we are working on a MultiMedia Driver that will enable
   your MIDI Applications to use M4U.

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Waldorf Electronics GmbH
Neustr. 9 - 12
53498 Waldorf, Germany