Audio Dynamics DMI Series Manual de usuario
A U D I O D Y N A M I C S
DMI
Dual MIDI Interface
MANUAL
Introduction
(Page)
The DMI Range 3
MIDI Connections (Important Note) 3
Section I
- Installation & Hardware
4
Installation 4
6 Points to remember 4
Variations 5
Section II - DMI 30 6
Variations 6
Upgrades 7
Connections 8
Section III - DMI 50 8
Variations 9
Upgrades 11
Connections 12
Section IV
- Connecting Your MIDI System
13
Connecting Your MIDI System 13
RISC OS MIDI 15
Appendix
An Introduction To MIDI
16
MIDI Instruments 17
General MIDI 18
GM Level 1 Performance Requirements
19
Sound Generator 19
Protocol Implementation 20
Trouble Shooter
21
Notes
22
Disclaimer
Audio Dynamics cannot accept responsibility for any damage oecurring to maehines
resulting from installation or use of Audio Dynamics produets.
While every effort has been made to make the installation instruetions as elear as
possible the responsibility of installation lies with the user and not the supplier of the
product.
If in doubt, seek expert advice.
The DMI Range
The DMI 30 is a Dual MIDI Interface and parallel user port on a single
mini expansion card for the Acorn A3000, 3010, 3020, and 4000
computers
The DMI 50 is a Dual MIDI Interface on a single half width expansion
card for the Acorn A3000, 300, 400, 500, 5000 and Risc PC computers.
Both Dual MIDI Interfaces provide a total of 32 MIDI channels across 2
independent ports.
They are fully compatible with all Acorn RISC OS MIDI software and
hardware, and are directly upgradable to the Audio Dynamics
PowerWAVE/XG 16-bit wave table synthesiser. In addition the DMI50
can be further upgraded to incorporate a 16-bit sampler.
NB. Before attempting installation of any kind please read the
Installation
and
Variations
sections fully.
MIDI Connections(Important Note)
Connections are made to the MIDI interlace using MIDI leads.
These have a 5-pin DIN plug at each end and look similar to some of the
more old-fashioned hi-fi leads except that the connecting cable has only
two cores and a screen, instead of four cores and a screen.
Under no circumstances should the MIDI cables be
connected to your hi-fi system.
MIDI sockets carry digital information which is completely incompatible with any
type of hi-fi input or output and connection between the interface and audio
equipment is likely to result in damage to either or both systems.
Installation
Installation of the DMI 30 should preferably be carried out by suitably
qualified or experienced personnel.
Installation of the DMI 50 can be carried out by the user.
If you are fitting the card yourself be sure to follow the instructions
given in the Expansion card installation instructions in your
machine's manual. In the event of uncertainty or difficulty, always
contact your nearest Acorn dealer.
6 points to remember :
1.. Always disconnect all power from the computer before removing
any part of the case.
2.. Always try to minimise handling the expansion card prior to
installation, and where possible earth yourself to a suitable ground
point. ie. A radiator or central heating / water pipe.
The metal chassis of the computer can be used, providing the mains
plug is still plugged in but the wall outlet is switched OFF!
3.. Ensure that all the connector pins are aligned with the mating
sockets before pressing the card into its expansion slot.
4.. Never try to force any of the connectors into the sockets.
5.. Be sure to secure the back panel of the DMI to the computer's
back panel using the screws provided.
If this is not done earth continuity is not maintained across the back
of the machine.
In addition to this, damage is likely to occur to the card or the host
machine if there is any movement in the expansion card.
6.. Don't exceed the power limitations of your particular machine.
When fitting any expansion device into an A3010, 3020 or 4000
machine, special attention should be paid to the capacity of your
machine's power supply and the power requirements of the
expansion device. Be especially careful if you already have memory
upgrades etc.
Placing too much load on your power supply can result in over -
heating inside the case or a drop in supply voltage, either of which
can cause intermittent or complete failure of the machine and / or its
peripherals.
(Power supply specifications can be found in the owners manual)
The DMI 30 requires 100mA current consumption. (500mW)
The PowerWAVE 30 requires 300mA current consumption. (1.5W)
Variations
The way your DMI main PCB is populated will depend on which
version of the card you have purchased and what level of upgrade
you have fitted.
The upgradable nature of the DMI cards means there are a variety of
connectors and links relating to each of the possible card variations.
The following section describes the DMI30 & DMI50 cards in detail
along with all possible upgrade variations/connections.
The DMI30
The DMI30 is a dual MIDI interface designed for the A30x0 & A4000
Acorn RISC OS machines.
It is a standard Acorn "mini-expansion" card and fits internally.
Variations
There are currently two variations :
Fig 1.0 shows the DMI card and all of its sockets/connections.
If you have purchased the PowerWAVE30 XG then you should also
have:
Upgrades
If you own the basic DMI then you can upgrade to the full
PowerWAVE XG.
The upgrade requires no tools or specialist knowledge to fit and
consists of :
Connections
MIDI (SK2) : to connect your DMI /PowerWAVE interface to external
MIDI equipment all you need to do is plug your MIDI connection
cable into SK2, and then your external MIDI equipment into the
In/Out(s) on your MIDI connection cable.
Audio (SK3) : if you have purchased a PowerWAVE/XG card then
SK3 and the audio phonos (supplied as part of the MIDI connection
cable) become active as Audio Output for connection to an
amplifier or headphones.
User Port (SK1) : the (optional) adapter cable converts the 25-way
D-connector (SK1 ) to a 20-way IDC socket. The IDC socket can
then be connected to a concept keyboard for example.
(NB. The standard User Port 20-way iDC socket can no longer be fitted to expansion
cards because it does not comply to new EMC regulations)
The DMI 50
The DMI 50 is a dual MIDI interface designed for the Acorn A5000 &
Risc PC RISC OS machines. It is a standard Acorn expansion card
and fits internally. In addition to MIDI the DMI 50 also offers 16 Bit
CD-Quality sampling capabilities.
Variations
There are currently five variations :
Fig 2.0 (over page) shows the DMI card and all relevant sockets/
connections.
If you have purchased the PowerWAVE 50 XG (2 or 4 above) then
you should also have :
If you have purchased one of the sampling variations (3, 4 or 5 on
previous page) then you should also have :
The non-MIDI "Control" sampling variation (5) has :
Este manual sirve para los siguientes modelos
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