Alesis wedge User Manual
Chapter 2 – Connections
26
Wedge Reference Manual
perfect condition for stray buzzes. Since most electronic devices of a sound
system don’t require a lot of current (except for power amplifiers), it’s usually
safe to run a multi-outlet box or two from a SINGLE wall outlet and plug in all
system don’t require a lot of current (except for power amplifiers), it’s usually
safe to run a multi-outlet box or two from a SINGLE wall outlet and plug in all
of the components of your system there.
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KEEP AUDIO WIRING AS FAR AWAY FROM AC WIRING AS POSSIBLE.
Many hums come from audio cabling being too near AC wiring. If a hum
occurs, try moving the audio wiring around to see if the hum ceases or
diminishes. If it’s not possible to separate the audio and AC wiring in some
instances, make sure that the audio wires don’t run parallel to any AC wire
(they should only cross at right angles, if possible).
Many hums come from audio cabling being too near AC wiring. If a hum
occurs, try moving the audio wiring around to see if the hum ceases or
diminishes. If it’s not possible to separate the audio and AC wiring in some
instances, make sure that the audio wires don’t run parallel to any AC wire
(they should only cross at right angles, if possible).
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TO ELIMINATE HUM IF THE ABOVE HAS FAILED:
A) Disconnect the power from all outboard devices and tape machines except
A) Disconnect the power from all outboard devices and tape machines except
for the mixer and control room monitor power amp.
B) Plug in each tape machine and outboard effects device one at a time. If
possible, flip the polarity of the plug of each device (turn it around in the
socket) until the quietest position is found.
socket) until the quietest position is found.
C) Make sure that all of the audio cables are in good working order. Cables
with a detached ground wire will cause a very loud hum!!
D) Keep all cables as short as possible, especially in unbalanced circuits.
If the basic experiments don’t uncover the source of the problem, consult your
dealer or technician trained in proper studio grounding techniques. In some cases, a
“star grounding” scheme must be used, with the mixer at the center of the star
providing the shield ground on telescoping shields, which do NOT connect to the
chassis ground of other equipment in the system.
dealer or technician trained in proper studio grounding techniques. In some cases, a
“star grounding” scheme must be used, with the mixer at the center of the star
providing the shield ground on telescoping shields, which do NOT connect to the
chassis ground of other equipment in the system.
MIDI Connections
MIDI (Musical Instrument Digital Interface) is an internationally-accepted protocol
that allows musical-related data to be conveyed from one device to another. The
MIDI connections on the Wedge provide four different functions:
that allows musical-related data to be conveyed from one device to another. The
MIDI connections on the Wedge provide four different functions:
• To recall Programs using MIDI program change messages
• To control (modulate) parameters inside the Wedge in realtime via MIDI
controllers (example: A keyboard’s mod wheel, or pedals, etc.)
• To record and play back edits from the Wedge front panel into a sequencer for
playback during a track
• To send and receive Sysex (System Exclusive) dumps of individual programs or
the entire bank of programs for storage and retrieval purposes
• To pass-on MIDI information thru the Wedge to another MIDI device.
To connect the Wedge’s MIDI ports to another MIDI device:
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Connect a MIDI cable from the Wedge’s MIDI [IN] connector to the other MIDI
device’s MIDI OUT connector.
device’s MIDI OUT connector.