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MIDI 16 Channel Duplicate Switches
 

MIDI 16 Duplicate Switches & 16 Volume Potentiometers

  

This unit provides the ability to send the single-channel MIDI output of a keyboard into a sort of "MIDI channel mixer/ muter" , where you have the ability (while on stage) to quickly change which channels (1-16) are duplicating the MIDI input signal, providing the ability to take one Midi channel on the MIDI Input and transmit/copy it to as many of the 16 MIDI channel Outputs as you want. This is very handy for creating multi-instrument layer stacks of differing instrument combinations.

 

There are also 16 potentiometer inputs which can control the MIDI Volume of each of the 1 to 16 MIDI Channels. The unit also has a Panic switch to switch ALL notes off.

 

 

 

 

 

MIDI 16 Duplicate SWITCHES & VOLUME POTS.

ITEM#: MIDI16DUPLSWSPOTS

PRICE:  €75.00


 

 

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The MIDI 16 Duplicate Switches and 16 Volume Potentiometers unit utilizes

  • An assembled, built and tested Arduino board including a suitable pre-programmed Atmega microcontroller,
  • A 2.1mm power socket, and associated LED, 
  • Select MIDI channel via toggle switches
  • A MIDI activity LED,
  • A power-on LED,
  • A MIDI IN & OUT board,
  • A 150mm wired MIDI 5-pin DIN input socket,
  • A 150mm wired MIDI 5-pin DIN output socket, 
  • 17 off 0.1" pin-terminal switch inputs, 
  • 16 off 0.1" pin-terminal potentiometer inputs, 

 

 

The MIDI 16 Duplicate Switches and 16 Volume Potentiometers also requires:

  • A 9v battery or equivalent DC power source,
  • 16 Toggle/SPST switches,
  • 16 10k ohm potentiometers or sliders,
  • 1 Momentary Push-button switch (Panic switch)
 

 

MIDI IN/OUT Wiring:

 

 MIDI_IN_OUT_CONNECTIONS.JPG (212235 bytes)

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The MIDI IN and OUT connectors use  5-Pin 180 degree DIN sockets. Note that the MIDI IN/OUT wiring is polarised and the correct pins should be used.

 

   

Circuit and Wiring  Diagrams:

The circuit schematic and the wiring diagram of the MIDI 16 Duplicate Switches and 16 Volume Potentiometers are both available.

 

Purpose:

The unit has a row of 16 channel-Duplicate/mute buttons. This provides the ability to take one Midi channel on the MIDI Input and convert it to as many of the 16 MIDI channels you want. So for example, if you had 8 of the buttons selected, you would be transmitting notes on 8 channels. This is very handy for creating multi-instrument layer stacks of differing combinations on the fly while playing a MIDI sampler/synthesiser, which you can set up with a separate instrument on each of the 16 channels. Note that MIDI Channel 10 is normally assigned to drums. The 16 potentiometers can also be used to control the MIDI Volume of each of the 16 MIDI channels.

 

MIDI Specification: 

When a MIDI 'Note-On' command is received, then MIDI 'Note-On' commands on the MIDI Channels corresponding to the MIDI Channel switches, which are Duplicated (ON), are transmitted.

 

When a MIDI 'Note-Off' command is received, then  MIDI 'Note-off' commands  corresponding to the MIDI Channel switches, which are Duplicated (ON), are transmitted.

  

Also, the outputs will switch off if a  MIDI 'Note-On' with a velocity of 00  is received. The unit also works in MIDI Running Status mode.

 

 

 

Panic Switch:

If the MIDI module  has MIDI note-on commands producing 'stuck' notes which drone on and on, then this switch will produce a series of 'All Notes Off' commands or individual 'Note Off' commands when the Panic switch is pressed, and switches all the notes off.

 

Because some older MIDI machines do not respond to the 'All Notes Off' command there are 2 modes of operation.

 

When the momentary action switch  is operated the MIDI panic unit first produces the 'All Notes Off' MIDI command on all 16 MIDI channels. These commands take approximately 16 mS.

 

Secondly the unit produces a 'Note Off'  MIDI command on all notes (0-127) and on all 16 MIDI channels. These commands take approximately 2048 mS to transmit.

 

Power Supply:

The  Arduino and MIDI board can be powered via the USB connection or with an external power supply. The power source is selected automatically.

 

External (non-USB) power can come either from an AC-to-DC adapter (wall-wart) or battery. The adapter can be connected by plugging a 2.1mm center-positive plug into the board's power jack. Leads from a battery can be inserted in the Gnd and Vin pin headers of the POWER connector. A low dropout regulator provides improved energy efficiency.

 

The board can operate on an external supply of 7 to 20 volts. If supplied with less than 7V, however, the 5V pin may supply less than five volts and the board may be unstable. If using more than 12V, the voltage regulator may overheat and damage the board. The recommended range is 7 to 12 volts.