Aphex Systems 1788a Indirect Midi Control, Ethernet LAN, Concept of Banks & Constellations

Indirect MIDI Control

MIDI controllers can access 1788A’s through the LAN indirectly by interfacing with one or more 1788A-R’s. A most basic example is illustrated below.

Fig. 1-3. Elementary Indirect MIDI Control

MIDI

Controller

DHCP

MIDIRouter

1788A-R 1788A

Cat 5/6

Ethernet LAN

Many applications call for more sophisticated remote control or control at greater distances than a MIDI port can handle. The Ethernet port is used to pipe UDP data between 1788A’s and dedicated hardware and computer-based control surfaces over a Local Area Network (LAN). Up to 128 1788A’s and 8 R/C units can be accommodated on a single LAN.

REFER to “Setting Up The LAN” for instructions on proper network hardware configuration.

Fig. 1-4. Some Of The Possibilities When Using A LAN

MIDI

Controller(s)

MIDI		DHCP
	Router
1788A-R			Switch
Additional
1788A-R’s
up to 8			Cat 5/6
Total

PC Software R/C

Max Qty. 1

Can Act As DHCP

Server

1788A

1788A

1788A

1788A

1788A

1788A

Max 128 1788A’s

1.3 CONCEPT OF BANKS & CONSTELLATIONS

When under LAN connected control, 1788A’s are addressed by their NET NUMBER which is manually assigned through each preamp’s front panel. This NET number identifies it as an individual unit and as a member of a BANK. Banks are contiguous Net numbers in groups of 16 according to the following table:

Table 1-1. Bank Definitions

Bank No.	1	2	3	4	5	6	7	8
Net Nos.	1-16	17-32	33-48	48-64	65-80	81-96	97-112	113-128

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