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Appendix
Working With Multiple Devices on Separate USB Ports
You can connect as many
eDRUM
in
devices to the same computer as you have USB
connections. Each
eDRUM
in
4 needs about 70mA and each
eDRUM
in
10 needs about
100mA, so you should be fine using a standard unpowered 4 port USB hub. Updating the
firmware while connected though a hub is not recommenced.
Managing Crosstalk Between Devices
Because multiple
eDRUM
in
devices connected to separate USB port don’t have any direct
connection, crosstalk issues can occur when two adjacent pads, connected to the same
mounting structure, are connected to separate
eDRUM
in
devices.
There are two ways to avoid crosstalk problems. One way involves physical isolation of
pads and cymbals, and the other involves routing MIDI from one device into the other.
Physical Isolation
Any pads connected to a common structure will experience crosstalk and so should be
connected to a single
eDRUM
in
so that the device can prevent this crosstalk from causing
mistriggers. Pads and cymbals that use separate stands will not experience any crosstalk
and therefore can be connected to a second unit without causing any mistriggering.
Crosstalk Cancellation via USB MIDI In
In some situations, physical isolation is not
possible. In these cases, the only option for
processing crosstalk between devices is to
route MIDI from each device into each other
device.
Because this method involves complicated
MIDI routing, the only support I offer is a
screenshot of the routing in Ableton Live.
How this is accomplished in various hosts
differs, but the general concept is the same.
The first track is the MIDI from both
eDRUM
in
devices, which is sent to Superior Drummer.
The second track routes MIDI from the
BLACK
eDRUM
in
to the BLUE
eDRUM
in
.
The last track routes MIDI from the BLUE
eDRUM
in
to the BLACK
eDRUM
in
.
There’s no need to record the MIDI used for
crosstalk processing, but the tracks do need
to have monitoring enabled.
e
DRUM
in
Manual
Page 43 of 49
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