MoltenVoltage Master Control MV-58 User manual

[e-mail] © 2015 - MoltenVoltage.com - All Rights Reserved.
v 1.09
OWNER’S MANUAL
Congratulations on purchasing the Molten Voltage™ Master Control MV-58
Master Control MV-58 is a programmable MIDI pedalboard controller that stores the tempo
associated with 128 programs, and transmits MIDI Clock to synchronize your MIDI-enabled effects.
Key Features
• Fully functional stand-alone Master Controller for MIDI-controlled PedalBoards
• Rock Solid MIDI Clock Generator
• Call up presets on your MIDI-enabled effects
• Solid, Professional-Grade construction, including
Riveted Steel MIDI Jack
• Large vivid LED display -- very easy to read
• Programmable pedalboard tempo control to
synchronize your effects
• Versatile tempo control, including precision tap
tempo
• MIDI Program Change and MIDI Start, Stop, and Clock output
• Robust, 128 program storage
• Causes other compatible Molten Voltage devices to self-program
• Simple, intuitive user interface

Molten Voltage™
Master Control MV-58
Owner’s Manual - p.2
[e-mail] © 2015 - MoltenVoltage.com - All Rights Reserved.
v 1.09
CONNECTING
Plug in a separate or isolated 9 volt, 2.1mm, 100mA minimum, tip negative DC Power supply into
the DC9V jack (I). Avoid powering Master Control using a "daisy chained" power supply that is also
connected to audio effects.
MV-58 - self-contained MIDI controller:
(A) CLOCK LED
(B) START Button
(C) Display
(D) DOWN Button
(E) UP Button
(F) TAP Button
(G) TEMPO LED
(H) SELECT Knob
(I) DC Power Jack
(J) MIDI OUT Jack
Designed with the end user in mind
The Master Control interface has been designed to make switching and storing programs as simple
as possible so the end-user can concentrate on being creative.
Programs are selected using the UP and DOWN buttons or by turning the SELECT Knob. The
selected program number is displayed on a large bright 3-segment LED display. The selected program is
engaged by pressing the START Button.
Making Master Control and all connected Molten Voltage devices save their current settings is even
easier - simply hold down the TAP Button for 2 seconds.
START Button (B)
The START Button is used to start and stop the MIDI Clock data output and to change Programs.
Each time the clock is started or stopped, a corresponding MIDI Start or MIDI Stop command is
sent. The Tempo will be reset and synchronized each time the clock is started.
Note: MIDI Start, Stop, and Clock are not channel-specific

Molten Voltage™
Master Control MV-58
Owner’s Manual - p.3
[e-mail] © 2015 - MoltenVoltage.com - All Rights Reserved.
v 1.09
If a Program is running (i.e. currently sending Clock data), pressing the START Button will stop the
clock unless a new Program number has been selected. In that case, pressing the START Button will send
the new Program Change message and the Clock data will continue uninterrupted.
When a new Program number has been selected but not yet engaged, the Display will flash. If no
Program is running, pressing the START Button will cause a MIDI Start command to be sent, together with
Program Change data, followed by a constant stream of Clock data.
Note: Stopping then re-starting the same Program does not cause additional Program Change
data to be sent.
Note: If the tempo has been altered but not saved, stopping then re-starting the same Program
does not recall the stored tempo, instead the altered tempo will continue to be used rather
than the stored tempo.
If a different Program is used, and later the previous Program is recalled, the previous
Program will recall its stored tempo rather than the altered tempo. In order to keep an
altered tempo, the Program must be saved, as described below.
Note: No program change is sent when powering up. To send the first program change, the start
button must be pressed.
TAP Button (F)
The TAP Button performs two separate functions, Tempo Control and Program Storage.
Tempo Control
When the TAP Button is first pressed, the current tempo is displayed. This provides a simple way
to check the tempo without altering it.
Pressing the TAP Button again within 2.5 seconds will adjust the tempo to the interval between the
taps. The new tempo starts right after the second or most recent tap. The time between the two most
recent taps always corresponds to the length of a quarter note.
The Display will show the adjusted tempo and light up the far right decimal point to indicate a new
tempo has been received.
Once at least one tap is received, the UP and DOWN Buttons and the SELECT Knob can be used to
"fine tune" the tempo.
Note: After the UP or DOWN Buttons are pressed or the SELECT Knob is turned, additional taps
have no effect.
Maximum tap interval = 2.5 seconds (24 bpm)
Minimum tap interval = 0.25 seconds (240 bpm)

Molten Voltage™
Master Control MV-58
Owner’s Manual - p.4
[e-mail] © 2015 - MoltenVoltage.com - All Rights Reserved.
v 1.09
Tempo change times out after 2.5 seconds. If a single tap was received, then the display again
shows the currently selected Program number.
If multiple taps were received, then “tPo” “SEt” (Tempo Set) will be displayed to indicate that a
new tempo has been received. The Display will then show the currently selected Program number.
Note: This new tempo is only temporary and will not be saved unless the Program is saved.
Tempo can be continually adjusted on-the-fly with the TAP TEMPO Button, whether or not MIDI
Clock is being sent.
Tempo changes affect only the current Program and are not stored unless the SAVE function is
used.
Similarly, Tempo changes do not affect any pending Program (indicated by a flashing Program
number). However, if the pending Program uses the "oLd" tempo, it will use the existing tempo.
Program Storage
Master Control stores the tempo associated with each of the 128 programs.
Holding down the first press of the TAP Button for more than 2.5 seconds causes Master Control to
save the current tempo at the selected Program location. Once the TAP Button has been held long
enough, the Display shows the letter “P”. Release the button to store the program.
At the time the tempo is stored, Master Control simultaneously sends a command to all
compatible Molten Voltage devices connected to the MIDI OUT, causing them to self-program
and store their settings for the selected Program.
The selected Program is the one that is shown by the Display. If the Program number is flashing,
the selected Program is not the same as the one that is currently running.
As such, the current Program can be copied into a new Program location by selecting a
different program number but not engaging that Program (normally done by pressing the START Button).
Instead, hold down the TAP Button until the letter “P” appears. The current settings will be saved to the
selected Program when the button is released.
If the DOWN Button is pressed while the TAP Button is being held (and after the letter “P”
appears), the decimal point after the “P” will turn on. This indicates that Master Control will not save the
current tempo, but instead will set the tempo status to "oLd", meaning that Program will use the then-
current tempo when it is recalled.
Following a SAVE, the saved Program becomes the current Program and Program Change data is
sent.
Note: If you tap in a new tempo, you need to wait until you are done tapping and Tap Mode ends
(about 2.5 seconds after the last tap) before you can store the new tempo.
Note: MIDI Clock output will stop while Molten Voltage self-program data is sent. As such, it will
usually be necessary to restart drum machines, sequencers, etc. after storing a tempo.

Molten Voltage™
Master Control MV-58
Owner’s Manual - p.5
[e-mail] © 2015 - MoltenVoltage.com - All Rights Reserved.
v 1.09
DOWN Button (D)
Pressing and releasing the DOWN Button will decrease the Program number by one. Pressing and
holding the DOWN Button will quickly decrease the Program numbers.
If the TAP Button has been pressed and released, pressing the DOWN Button will decrease the
tempo by one bpm. Pressing and holding the DOWN Button will quickly decrease the tempo.
Once the DOWN Button has been pressed, subsequent Taps will not affect the tempo until the 2.5
second tempo change time-out occurs, however the UP Button and SELECT Knob can still be used to
change the tempo.
UP Button (E)
Pressing and releasing the UP Button will increase the Program number by one. Pressing and
holding the UP Button will quickly increase the Program numbers.
If the TAP Button has been pressed and released, pressing the UP Button will increase the tempo
by one bpm. Pressing and holding the UP Button will quickly increase the tempo.
Once the UP Button has been pressed, subsequent Taps will not affect the tempo until the 2.5
second tempo change time-out occurs, however the DOWN Button and SELECT Knob can still be used to
change the tempo.
MIDI OUT Jack (J)
Connect Master Control to your MIDI device that will receive MIDI data by plugging a standard 5-
pin DIN MIDI cable into the MIDI OUT jack.
For best results, keep the MIDI output cable length under
fifteen (15) feet. If you need more distance, use a MIDI
repeater such as MIDI SPLITTY
The MIDI OUT Jack sends MIDI data as well as Molten Voltage self-programming messages.
SELECT Knob (H)
Turning the SELECT Knob will cause the program number to increase or decrease.
When a new program number has been selected, the Display will flash until the START Button has
been pressed and the selected program is engaged.