MOTU Digital Timepiece Instruction Manual download pdf (Page 42)

USING MICRO EXPRESS CONSOLE

Filtering channelized messages

Each channel in the Channelized section has its

own ﬁltering settings. Think of the channel

selection as letting you step through the 16

different ﬁlter combinations on each channel on a

particular port (as conceptualized in Figure 6-14).

Figure 6-14: The channel settings in the Filter window lets you have

“layers” of ﬁltering. Each channel has its own ﬁlter settings.

☛ When “All” is selected as the channel,

adjusting the message check boxes affects the

ﬁltering of the messages on every channel. Under

this circumstance, the check boxes have a third

state (a “hatched-out” box as shown in Figure 6-13)

to indicate that a message is both ﬁltered on one or

more channels and not ﬁltered on one of more

channels. When the check box contains an “X”, the

message is ﬁltered on all channels and when it

contains a “check” the message is not ﬁltered on any

channel. You may cycle through the “all not

ﬁltered”, “all ﬁltered” and “combination ﬁltered”

states by adjusting the check box from “check” to

“X” to “box” and back.

You can use the + and - keys to scan up and down

through the 16 channels at any time in the Filter

window. This makes it easy to adjust the ﬁlter

setting for a particular type of message at one time

without having to shift focus between the channel

setting and the ﬁlter setting.

For example, suppose you wanted to ﬁlter the

MIDI Timing Clock messages being generated by a

drum machine connected to input 1. MIDI Timing

Clock messages are from a general class of MIDI

messages called “real time” messages. All real time

messages are from the even more general class of

“non-channelized” messages. So, ﬁrst, you would

access the Filter window for the input 1 (see

“Changing a ﬁlter setting” on page 39). In the Non-

Channelized section, click the check box next to

Real time so a red “X” appears. This setting will

prevent MIDI Timing Clock messages from

passing through the port. The overall effect of this

setting will prevent Timing Clocks from being

routed to any outputs connected to input 1 or being

received by any MIDI software using “In 1”.

CHANNEL MAP WINDOW

The Channel Map window allows you to change

the MIDI channel of all messages passing through

an input or output port. You can “remap” the

channels in any way you wish. Remap only one

particular channel, any combination or all

channels. As with the ﬁlter settings, each port can

be conﬁgured to have independent channel

remapping settings. The Micro Express defaults to

no channel remapping (meaning channel 1 maps

to channel 1, channel 2 maps to channel 2, etc.),

and in most cases, this should be the desired

default.

Figure 6-15: The Channel Map window for the input named “K2500”

showing channel 1 being mapped to channel 3.

Making a channel map setting

To remap channels of MIDI messages for a

particular port:

1 Click on the port’s icon in the MIDI Routing

window.

Original

channel

Remapped

channel

!USB Interfaces Manual Book Page 40 Tuesday, October 10, 2000 12:43 PM

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MOTU Digital Timepiece Instruction Manual Page 42

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