Primova MIDX-20 User Manual

MIDX-20 User’s Manual

1

MIDX-20

DUAL USB MIDI Host

Class Compliant USB MIDI devices

Roland/BOSS devices

BOSS Katana Amplifiers

Fender Mustang™ Amplifiers

USER’S MANUAL

Rev. 2016-11-23

MIDX-20 User’s Manual

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TableofContents

DESCRIPTION ............................................................................................................................. 3

CONNECTORS ............................................................................................................................ 4

MIDI IN AND MIDI OUT 5-PIN CONNECTORS ............................................................................ 4

USB CONNECTORS ..................................................................................................................... 4

POWER CONNECTORS ............................................................................................................... 5

PHYSICAL DIMENSIONS ............................................................................................................. 5

CONTROLLER JACKS 1 & 2 ......................................................................................................... 6

STATUS LEDS .............................................................................................................................. 7

Fender Mustang™ Bridge .......................................................................................................... 7

Fender Mustang™ Bridge - MIDI Implementation .................................................................... 8

SETTING UP THE UNIT ............................................................................................................. 10

MIDX-20 CONNECTION EXAMPLES.......................................................................................... 16

REAL-TIME MESSAGES ............................................................................................................. 18

MIDX-20 MODES / MIDI DATA FLOW ...................................................................................... 18

UPR IS ‘DEV OUT’ and MIDI THRU/MERGE is ‘OFF’ ............................................................. 19

UPR IS ‘DEV OUT’ and MIDI THRU/MERGE is ‘ON’ .............................................................. 19

UPR IS ‘DEV IN/OUT’ and MIDI THRU/MERGE is ‘OFF’ ........................................................ 20

UPR IS ‘DEV IN/OUT’ and MIDI THRU/MERGE is ‘ON’ ......................................................... 20

UPR IS ‘CTRL IN’ and MIDI THRU/MERGE is ‘OFF’ ............................................................... 21

UPR IS ‘CTRL IN’ and MIDI THRU/MERGE is ‘ON’ ................................................................ 21

UPR IS ‘CTRL IN/OUT’ and MIDI THRU/MERGE is ‘OFF’....................................................... 22

UPR IS ‘CTRL IN/OUT’ and MIDI THRU/MERGE is ‘ON’ ........................................................ 22

SETUP USING PC SOFTWARE ................................................................................................... 23

FIRMWARE UPGRADES ............................................................................................................ 23

WARRANTY .............................................................................................................................. 23

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MIDX-20 DUAL USB Host

DESCRIPTION

The MIDX-20 unit has two USB Host ports (USB A sockets), a MIDI IN and a MIDI
OUT (both 5 pin MIDI) port, plus two controller jacks for generating MIDI from

external expression pedals or dual foot switches.

There are various programmable MIDI routing possibilities between the connectors.
A USB MIDI (foot) controller may control a USB device as well as other 5-pin MIDI
equipment.

Another routing possibility is when a 5-pin MIDI (foot) controller controls up to two
USB devices (see separate chapter for full description of the routing capabilities).

When connecting a guitar synthesizer with Guitar-to-MIDI conversion an external
synthesizer can be used for playback.

The unit also has an optional MIDI THRU/MERGE mode, sending 5-pin MIDI IN to the
5-pin MIDI OUT at the same time as other data from the USB devices is transmitted.

The two USB connectors are fully Roland/Boss compatible allowing any Roland/Boss
USB device to be connected for control or playback. Roland/Boss devices use a
vendor-specific USB MIDI communication protocol. This unit is compatible with the
following Roland/BOSS Guitar devices: Katana Amplifiers, GT-10, GT-100, GT-001,
VG-99, GR-55, GP-10 and SY-300.

Both USB connectors recognize Fender Mustang™ Amplifiers allowing the amps to
be controlled using MIDI commands (see the Mustang MIDI implementation chart
elsewhere in this manual).

Any MIDI class compliant USB device may be used with the unit, such as Fishman
TriplePlay, KMM SoftStep2, Logidy UMI3 USB MIDI Foot Controller, etc.

The MIDI USB Host is powered by a regulated 8-12V (center negative) mains adaptor
(not supplied) or a 5V Mini USB cable via a phone charger (not supplied).

Important:

- The MIDX-20 does NOT support USB Hubs.

- Powering the unit using a Mini USB cable directly connected to a Personal
Computer works, but is not recommended as digital noise may be
introduced.

- The unit can deliver a current up to 1.0 Amp assuming the power supply
(pedal board adapter or Mini USB adapter) is rated at that level.

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CONNECTORS

MIDIINANDMIDIOUT5-PINCONNECTORS

The two 5-pin MIDI connectors allow for connection of ‘classic’ MIDI devices in the
communication stream. The unit provides an optional MERGE/MIDI THRU feature
(enabled with the SET button), which will forward any incoming MIDI message from
the MIDI IN 5-pin connector directly to the MIDI OUT 5-pin connector. If there’s a
collision between USB messages from the USB device with messages from MIDI IN,
the message that started first gets priority to complete before the other streams are
allowed to pass through.

USBCONNECTORS

The MIDX-20 USB Host connectors allow communication with two Roland/BOSS
devices, Mustang™ Amplifiers, or any other class compliant MIDI devices. The
connector is of ‘stacked’ type with an upper and a lower USB slot.

The lower connector (LWR) is intended for a device controlled either by the upper
(UPR) connector or via 5-pin MIDI, and cannot be reconfigured.

The upper connector (UPR) is configurable and may be programmed for a second
device controlled by 5-pin MIDI or may be configured for a USB Foot controller.



MIDI IN MIDI OUT USB Connectors

(LWR and UPR)

8V – 12VDC
(center negative)

Mini USB 5V)

SET Button

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POWERCONNECTORS

The MIDX-20 can be powered by:

1. Normal DC pedal board adapter (not included) 250mA – 2.0A (8V - 12V DC,
center pin negative). If the wrong polarity is used the unit will not be harmed,
but it will not work.

2. Mini USB cable (5V DC) from a phone charger (not included).

When connected to most devices the current draw by USB is negligible however the
LEDs and microcontroller circuitry require a few milliamps. The unit can deliver a
current up to 1.0 Amp assuming the power supply (pedal board adapter or Mini USB
adapter) is rated at that level.

PHYSICALDIMENSIONS

Dimensions 120 x 65 x 35 mm (max)
Weight 200g



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CONTROLLERJACKS1&2

Each of the jacks allows you to connect either a Roland EV-5
expression pedal, a Roland FS-6, or Roland FS-7 compatible
dual foot switch. The expression pedals or foot switches will
be continuously monitored and converted to MIDI control
commands.

EXPRESSION PEDALS (ANALOG CONTROL)

Expression pedals compatible with MIDX-20 require a
10 kOhm potentiometer. The stereo plug TIP is
connected to the center tap of the potentiometer
(Output), the SLEEVE is connected to one end of the
potentiometer (Ground) and the RING (Input) is
connected to the other end of the potentiometer. At
heel-down position the lowest resistance should be
obtained between Tip (Output) and Sleeve (Ground)

Recommended expression pedals:
Roland EV-5, EV-7, Boss FV-500L

DUAL FOOT SWITCHES (ON/OFF CONTROL OR PROGRAM CHANGE)

Dual footswitches compatible with MIDX-20 require:

- One switch to short the TIP to SLEEVE when pressed.

- The other switch short the RING to SLEEVE when pressed.

The switches must be of MOMENTARY type (or the switch unit
must be configured to MOMENTARY mode).

Recommended switches:
Boss FS-6 and Boss FS-7

IMPORTANT NOTE:

For FS-7 use these settings: Polarity = II (RIGHT), Mode = FS-5U Momentary.
For FS-6 set both switches: Polarity = RIGHT, Mode = FS-5U Momentary.

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STATUSLEDS

In normal operation the LED’s show the following information.

FenderMustang™Bridge

MIDX-20 contains special software that allows control of one or two Fender
Mustang™ Amplifiers using regular MIDI commands.

You may control the Mustang™ by using an external MIDI controller connected to
the MIDX-20 and/or by using expression pedals/foot switches connected to the
CTRL1 and CTRL2 jacks.

IMPORTANT NOTE:

If you connect a Mustang™ to the upper USB connector the MIDX-20 need to be in
“DEVICE IN/OUT” mode (the leftmost LED showing RED) for proper operation.

If you connect a Mustang™ to the lower USB connector all of the Upper USB Modes
may be used.



Status of upper USB connector

Yellow – USB Disconnected
Green – Connected OK
Red – Connection Failed

Status of lower USB connector

Yellow – USB Disconnected
Green – Connected OK
Red – Connection Failed

Upper USB mode

Not lit – DEVICE OUT
Red – DEVICE IN/OUT
GREEN – CONTROLLER IN
YELLOW – CONTROLLER IN/OUT

5-PIN MIDI OUT TRAFFIC

Blinks when sending data.

- Normal mode: LED is normally off but
turns on when data is transmitted.

- MERGE/MIDI THRU mode: LED is
normally on but turns off when data is
transmitted.

5-PIN MIDI IN TRAFFIC

Blinks when receiving data.

- Normal mode: LED is normally
off but turns on when data is
received.

- MERGE/MIDI THRU mode: LED
is normally on but turns off
when data is received.