Recording - August 2015 - 45
3
inputs and outputs. You often had to filter
out certain messages, rechannel others,
and sometimes remap others still.
A MIDI interface that could do all that
stuff was worth its weight in gold; the best
example is the late and much lamented
Opcode Studio 5, a huge 15 x 15 interface that could process MIDI data in a
4
MIDI Channels each. There are also
eight streams from devices hooked up to
the Host Port, and one stream dedicated
to the 5-pin DIN MIDI In and Out jacks.
And while the DIN jacks move data at
MIDI's original and now glacially slow
31.25 kbps, the other streams are virtual and can throw huge amounts of information at USB speeds, allowing for solid
timing and networking. (Oh, speaking
of timing, you can set a global clock
source for the network so that all the
pieces stay locked in sync to one another.) A total of 29 streams, or 464 independent MIDI Channels, are available...
if you need more than that, I'd love to
know what for.
But the iCA4+ doesn't just provide MIDI
routing and control. As anyone who's
done work with the MIDI spec for more
than a few weeks can probably tell you,
there's a lot of extraneous data in every
MIDI stream, or data that's on the wrong
channel, or set to the wrong Continuous
Controller number because a USB control
surface can't be easily reconfigured, and
so on and so forth. Back in the bad old
days, when every manufacturer had a different (and usually horrible) way of misinterpreting how MIDI was supposed to
work, it wasn't enough to simply connect
variety of ways (but which required Mac
OS 9 to be programmed). The iCA4+,
via its internal DSP engine, can do almost
everything the Studio 5 could. It's controlled by a series of iConfig tabs called
MIDI Port Routing, MIDI Port Filters, MIDI
Channel Remap, MIDI Controller Filters,
and MIDI Controller Remap.
Figures 3, 4, and 5 show typical layouts
of how data looks in these tabs. In Figure
3, we're in the MIDI Port Routing Tab,
looking at data from the first USB controller hooked up to the Host Jack (HST1).
It's being routed to MIDI stream (called a
Port in iConnectivitySpeak) number 3 on
both the connected Devices, and also to
all seven of the other USB controllers
hooked up to the Host Jack, presumably
via a powered hub. It's also being routed
to the physical MIDI Out on the actual
hardware box (labeled DIN here).
Figure 4 shows the MIDI Port Filters tab.
In this example, we have a series of input
filters set up on data coming from the
physical DIN port on the interface and
being routed to the Device on Jack 1.
Data on MIDI Channels 1 through 4 are
having polyphonic key pressure events
removed, while 5 through 8 are having
channel pressure removed, and the
device on Channel 10 is having Program
5
RECORDING August 2015
45
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Table of Contents for the Digital Edition of Recording - August 2015
Contents
Recording - August 2015 - Intro
Recording - August 2015 - Cover1
Recording - August 2015 - Cover2
Recording - August 2015 - 1
Recording - August 2015 - 2
Recording - August 2015 - 3
Recording - August 2015 - 4
Recording - August 2015 - 5
Recording - August 2015 - Contents
Recording - August 2015 - 7
Recording - August 2015 - 8
Recording - August 2015 - 9
Recording - August 2015 - 10
Recording - August 2015 - 11
Recording - August 2015 - 12
Recording - August 2015 - 13
Recording - August 2015 - 14
Recording - August 2015 - 15
Recording - August 2015 - 16
Recording - August 2015 - 17
Recording - August 2015 - 18
Recording - August 2015 - 19
Recording - August 2015 - 20
Recording - August 2015 - 21
Recording - August 2015 - 22
Recording - August 2015 - 23
Recording - August 2015 - 24
Recording - August 2015 - 25
Recording - August 2015 - 26
Recording - August 2015 - 27
Recording - August 2015 - 28
Recording - August 2015 - 29
Recording - August 2015 - 30
Recording - August 2015 - 31
Recording - August 2015 - 32
Recording - August 2015 - 33
Recording - August 2015 - 34
Recording - August 2015 - 35
Recording - August 2015 - 36
Recording - August 2015 - 37
Recording - August 2015 - 38
Recording - August 2015 - 39
Recording - August 2015 - 40
Recording - August 2015 - 41
Recording - August 2015 - 42
Recording - August 2015 - 43
Recording - August 2015 - 44
Recording - August 2015 - 45
Recording - August 2015 - 46
Recording - August 2015 - 47
Recording - August 2015 - 48
Recording - August 2015 - 49
Recording - August 2015 - 50
Recording - August 2015 - 51
Recording - August 2015 - 52
Recording - August 2015 - 53
Recording - August 2015 - 54
Recording - August 2015 - 55
Recording - August 2015 - 56
Recording - August 2015 - 57
Recording - August 2015 - 58
Recording - August 2015 - 59
Recording - August 2015 - 60
Recording - August 2015 - 61
Recording - August 2015 - 62
Recording - August 2015 - 63
Recording - August 2015 - 64
Recording - August 2015 - 65
Recording - August 2015 - 66
Recording - August 2015 - 67
Recording - August 2015 - 68
Recording - August 2015 - 69
Recording - August 2015 - 70
Recording - August 2015 - 71
Recording - August 2015 - 72
Recording - August 2015 - Cover3
Recording - August 2015 - Cover4
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