MIDI Solutions Products Application Examples

Merger, Quadra Merge, M8

Thru, Quadra Thru, T8

Footswitch Controller, F8

Relay, R8

Event Processor, Event Processor Plus

Pedal Controller

Breath Controller


Velocity Converter

Custom Products




Quadra Merge



MIDI Solutions Mergers allow you to connect multiple MIDI Outs or Thrus to a single MIDI In. For example, if you are using a few MIDI keyboards and need to connect them to a sound module with a single MIDI input, a merger can be used to merge the keyboards' outputs to that input.

Mergers can also be used to merge System Exclusive data from sound modules back to computers running editor/librarian applications. This enables you to free up inputs of your MIDI interface which otherwise would have been used by the individual outputs of each sound module.

Another novel application for mergers is expanding the merging capabilities of MIDI patchbays that allow merging of only two MIDI inputs at a time. By connecting a patchbay's outputs to a merger and then looping the output of the merger back into the patchbay, you can effectively add more merging capabilities to the patchbay. The outboard merger can be thought of as in additional processor that is accessed simply by changing the patchbay's routing configuration.



Quadra Thru



MIDI Solutions Thru boxes provide additional MIDI Thrus wherever required in a MIDI setup. For example, if you need to send a single MIDI data stream from a sequencer to a number of sound modules, you can use a Thru box to provide extra MIDI connections to those modules.

As MIDI devices are daisy-chained from one to another, MIDI signals gradually lose their integrity due to passage through optoisolaters at the devices' MIDI inputs. MIDI Solutions Thru boxes can be used to clean up the MIDI signal at any point in the chain where it is starting to become unrecognizable (actually all MIDI Solutions products clean up MIDI data in this way). Be careful of other Thru boxes that amplify errors along with the signal; MIDI Solutions Thru boxes actually read in the data and re-clock it out at the correct baud rate, eliminating any errors that have accumulated due to daisy-chaining or long cable runs. Because of this, MIDI Solutions Thru boxes can also be used to extend a MIDI connection further than the standard 50 feet. By connecting Thru boxes in series it is possible to extend the MIDI cable length by 50 ft. at a time (to send MIDI over even longer distances, see the Power Adapter).

Click here to see an application of the Quadra Thru in Gus G's Ozzy stage rig

Footswitch Controller



The MIDI Solutions Footswitch Controller can be used to generate virtually any type of MIDI message. It can also be used to perform additional functions such as Transpose, Channelize, and Tap Tempo. The F8 is essentially eight Footswitch Controllers in a single rack space unit.

A common application for the Footswitch Controller is to remotely Start and Stop an external sequencer or drum machine. Check the operating instructions of the sequencer or drum machine to determine which MIDI messages it needs to receive in order to start and stop; some devices simply require the MIDI Start and Stop messages - in this case you can program the Footswitch Controller to toggle between sending these messages with each tap of the footswitch. Other devices require both MIDI Start/Stop messages and MIDI Clock messages - in this case you will need to use two Footswitch Controllers connected in series (or a single Dual Footswitch Controller, or two inputs of an F8), one programmed in tap tempo mode to send the MIDI Clock messages, and the other programmed to send Start and Stop messages (this setup allows you to tap in the tempo of the song you are about to play before the song is actually started). Or, if the sequencer or drum machine has the capability of responding to MIDI Machine Control messages, you can program a single Footswitch Controller to toggle between MIDI Machine Control Play and Stop messages with each tap of the footswitch (MIDI Machine Control messages are System Exclusive messages).

Quite a few MIDI devices other than musical instruments use MIDI Note or Control Change messages to activate their various MIDI functions. For example, some of the Yamaha mixing consoles require a middle C to activate their talkback function. The Footswitch Controller can be programmed to generate a middle C, allowing you to control the mixing console's talkback remotely. Cakewalk's Sonar offers a key binding function that enables users to control many of its functions by sending it a series of two notes. The Footswitch Controller can be programmed to send out two MIDI notes in succession, allowing you to control many of Sonar's functions such as Start/Stop, Record, even CAL program files.

The Footswitch Controller has some other useful functions such as Transpose and Channelize.
- The Transpose function allows you to transpose to any key by depressing the footswitch, playing any note above or below middle C, and then releasing the footswitch. For example to transpose up by a major third depress the footswitch, play E above middle C, and then release the footswitch. After doing this, all notes received by the Footswitch Controller are transposed up by a major third. An alternate method of transposing without releasing the notes that are currently playing is by using Pitch Bend - the Footswitch Controller can be programmed to send out a specific Pitch Bend value whenever the footswitch is depressed, and reset Pitch Bend to zero when it is released.
- In Channelize mode the operation is similar to Transpose mode, except that the number of notes is stored. After the footswitch is released all MIDI messages are rechannelized to the channel corresponding to the number of notes that were received. For example to rechannelize to channel five, depress the footswitch, hit any five keys, and then release the footswitch.

Click here to see another customer's wireless trigger application for the Footswitch Controller.




The MIDI Solutions Relay contains a contact closure that can be programmed to open and close in response to a variety of MIDI messages. The R8 is essentially eight MIDI Solutions Relays in a single rack space unit.

Probably the easiest way to use the MIDI Solutions Relay is to set it up to respond to a Note or Controller message. The relay can then be activated by an operation as simple as hitting a key on the keyboard or depressing a footswitch. If the key or footswitch movements are recorded into a sequencer, the sequence can later be replayed and the relay will respond in exactly the same way it was recorded.

The Relay can also be programmed to respond to Program Change messages. This can be useful for controlling non-MIDI devices while cycling through program changes during a live performance. For example, consider a setup that uses a MIDI pedal board to send program changes to an effects unit. Add to this a guitar amp that allows switching from clean to dirty via a 1/4" footswitch input, but not via MIDI. The relay can be connected directly to the footswitch input of the guitar amp to control it as program changes occur, placing this non-MIDI device under MIDI control. With both the effects unit and the guitar amp responding to program change messages sent by the MIDI pedal board, it is now possible to create customized effects that combine both of these products.

Another type of message that the Relay can be programmed to respond to is System Exclusive, including MIDI Show Control and MIDI Machine Control messages such as transport commands from devices like digital audio recorders or sequencers. For example you could set up the relay to close in response to a MIDI Machine Control Play message, and open in response to a MIDI Machine Control Stop message. The relay output could then be used to control an external device, such as an indicator light.



Processor Plus

Click here to see a video of a customer's application using an Event Processor Plus to map notes to CC messages to control a Korg Kaossilator Pro, along with a table showing the MIDI messages mapped here, and a file containing the Event Processor Plus settings required to achieve the mappings here. And another video here of his application controlling the Korg MicroSAMPLER from the Behringer FCB1010, along with a table showing the MIDI messages mapped here, and the Event Processor Plus settings required to achieve this here. Please note that the information posted is that which the customer has provided, we have not tested this application here and are not able to provide technical support for it.

More Event Processor Application Examples coming soon, meanwhile you can find lots of example files included with the Event Processor Programming Tools and the Event Processor Plus Programming Tools software.

Pedal Controller

Since the Pedal Controller can merge incoming MIDI messages with the messages it generates, it can be inserted inline at any point in the MIDI data stream, allowing you to add continuous control to any of your MIDI instruments. For example you can connect the Pedal Controller inline between the output of a MIDI keyboard and the input of a MIDI sound module. By setting the Pedal Controller to send volume, you can affect the volume of the sound module while playing the keyboard. You could also send this output to a sequencer which would record not only the notes from the keyboard, but also the pedal movements generated by the Pedal Controller.

Since the Pedal Controller accurately tracks the position of the pedal or potentiometer connected to it, it can be used to control more sensitive parameters such as filter cutoff. Many control wheels or knobs only update themselves every two or every four values, resulting in zipper noise. If the Pedal Controller detects even a slight movement in the pedal it will send an update even if the position has only changed by a single value, resulting in a smooth sweep.

The Pedal Controller can also be programmed to generate pitch bend messages. It's possible to program the minimum and maximum pitch values that the Pedal Controller sends, allowing you to set it up as an upward bend or downward bend only device. This makes it much easier to return to the zero pitch position at the top or the bottom of the pedal movement, rather than a position in the center.

Another application for the Pedal Controller is to use it to control specific parameters of a sound that can not normally be controlled by more common MIDI messages. The Pedal Controller allows you to send a System Exclusive message with a single variable byte, determined by the position of the pedal. These messages can be sent to synths that allow parameters to be controlled only via sysex, enabling you to experiment with sounds in new ways that were previously not possible using only MIDI controller messages.

It's not even necessary to use an expression pedal with the Pedal Controller - a custom-built knob or slider connected to the Pedal Controller can be used to send MIDI messages that typical knobs and sliders won't allow you to send. Potentiometers of resistances from 10k to 250k will work well with the Pedal Controller. As for connecting the potentiometer's three terminals to the tip, ring, and sleeve of the Pedal Controller's 1/4" input, just be sure that the wiper of the potentiometer is connected to either the tip or the ring, the other terminals can be connected in any way - the Pedal Controller will automatically determine the configuration on power-up.

Click here to see an application of how the MIDI Solutions Pedal Controller was used to help create a Desert Organ at the 2002 Burning Man Festival.

Breath Controller

The Breath Controller converts the voltage from the Yamaha BC3A Breath Controller to continuous MIDI data and can be inserted inline anywhere in the MIDI data stream. By connecting the Breath Controller between a MIDI keyboard and sound module you can add control of various parameters such as volume, modulation, aftertouch, etc. (the message type is programmable to most types of MIDI messages).

Just like pedal controller you can set up the Breath Controller to control a specific System Exclusive parameter. This enables you to control synth parameters that cannot be controlled by MIDI controller messages. The Breath Controller allows you to send a System Exclusive message with a single variable byte, determined by the amount of breath pressure applied to the unit. These messages can be sent to synths that allow certain parameters to be controlled via sysex only, enabling you to experiment with sounds in new ways that were not previously possible.

Patchman Music produces a wide range of wind controller soundbanks that are the perfect companion to the MIDI Solutions Breath Controller. For more information see Patchman Music Wind Controller Soundbanks.


One of the most obvious applications that is often overlooked for the Router is to filter specific types of MIDI messages or specific MIDI channels; not only can the Router can be programmed to route MIDI data to either of its two MIDI outputs, it's also possible to route MIDI data to neither of its outputs, effectively filtering it. The most common use of this function is to filter out selected MIDI channels to synthesizers or sound modules that receive in omni mode only and do not have the ability to turn individual MIDI channels on or off. Because the settings of the Router are stored in a most recent setting priority format, it's possible to filter or pass any combination of the 16 MIDI channels, using only 10 settings.

In addition to having the option of selecting the type of MIDI message to be routed or filtered, it's also possible to select a range of values to be routed or filtered within the MIDI data type itself. For example, if you need a sound module in your setup to respond to program change messages 1-10 only, you can filter out program change messages in the range 11-128.

The Router can also be used to split a keyboard that is sending on a single MIDI channel into multiple ranges on separate MIDI channels. For example you could route all notes below middle C to MIDI channel 1, and all notes middle C and above to MIDI channel 2, both to the same output of the Router. Or, since the Router has two outputs, you could also set it up to route the lower keyboard range to the first output, and the upper keyboard range to the second output. If you want to take things further you can add additional zones, or even set up unique split points for each incoming MIDI channel. The Router will store up to 10 settings so it can be configured to split, route, and filter MIDI data in almost any way you'd ever need to.

Velocity Converter

The main function of the Velocity Converter is to expand the velocity range of keyboards that are unable to send the full velocity range, like the older Yamaha DX7, however it can also be used to match the velocity sensitivity of a keyboard to a number of different sound modules. For example, let's say you are using a single keyboard to play two different sound modules, each receiving on a separate MIDI channel. If one of these sound modules is very sensitive to the slightest touch, while the other barely responds unless the keys are hit really hard, the MIDI Solutions Velocity Converter can be used to apply a separate velocity curve to each MIDI channel, so you can match the velocity response of your keyboard to each sound module in your setup, correcting for these differences.

The Velocity Converter also includes a function that can be used to apply continuous controller data to MIDI velocities. For example, if you play a wind controller that sends constant velocity values for each note played, then each note will produce a sound with identical attack, making for a sound that is boring and uninteresting. The Velocity Converter can actually apply the value of an incoming controller (with an offset, if necessary) to the velocity values, allowing you to add this inherent expressiveness to the sound to give it more depth.

Custom Products

MIDI Solutions Processors and Professional Series products are designed to provide solutions to almost any MIDI-processing task imaginable. However occasionally MIDI processing requirements arise that could never have been predicted, and often the solution can be accomplished by modifying the firmware in one of our existing products. Please note that we do not take on projects that require the design of new hardware. However if you are in need of a MIDI processing function that can be incorporated into one of our existing products by a making a modification to the microcontroller's firmware, we likely can provide the solution. Please see Custom Products for more information.


Products | FAQs | Support | About Us | Ordering

PO Box 3010, Vancouver, BC Canada V6B 3X5   Email: info@midisolutions.com   
Copyright 2016 MIDI Solutions Inc. All rights reserved.