Roland GI-10 - Understanding MIDI Channels; Poly vs. Mono Modes; Using MIC IN for External Sound; Setting MIC IN Receive Channel

10
What are MIDI channels?
The GI-10 converts the input signal from the GK
IN connector or MIC IN jack into MIDI data. MIDI
stands for Musical Instrument Digital Interface,
and is an international standard for the exchange
of data between computers and musical instru-
ments. MIDI data is exchanged only when both
sending and receiving equipment are set to the
same MIDI channel (channels range from 1 to 16).
Refer to p. 9 for details on setting channels.
About the Poly/Mono modes...
The GI-10 provides two modes that can be used for
sending MIDI data: the Poly mode and the Mono
mode.
In the Poly mode, the data for all strings is sent
using a single MIDI channel specified using the C.
MIDI CH parameter. Because the guitar part uses
only one MIDI channel, this allows the remaining
channels to be used for other purposes. It also
allows you to achieve satisfactory results using
sound generators that are not capable of receiving
on six channels at once. When multiple strings
sound at the same time, however, the bend data is
not sent, so all pitch changes occur in semitone
steps. As a result, string bending techniques (for
example) will not be fully reflected by the external
MIDI device.
In the Mono mode, the data for each string is sent
on its own MIDI channel. Six consecutive channels
will be used, starting with the one specified for the
C. MIDI CH parameter. So, if the MIDI transmit
channel is set to channel 1, then channels 1 to 6 will
be mapped to strings 1 to 6, in that order. For
Mono mode send, continuous pitch change data is
sent independently for each string, allowing for
full representation of guitar performance tech-
niques. However, you need to be using a multitim-
bral sound generating unit that offers 6 or more
parts (or a unit capable of handling Mono mode
reception even though it does not actually provide
six parts, such as the Roland D-50/550, etc.).
Refer
to
p.
9
for
details
on
setting
the
send
mode.
Sounding External Sound Generator
Using
Device
Connected
to
MIC
IN
Signals from a microphone, or normal guitar out-
put (i.e., not using a divided pickup) can be input
to the GI-10’s MIC IN for conversion to MIDI data.
<Setting the External Sound Generator>
The GI-10 converts the MIC IN signal into MIDI
data, and this data is always sent in the Poly mode.
This means it is set to only one part on the sound
generating side. See left for details on Poly mode
transmission.
1. Set the MIDI receive channel.
2. Set the MIDI receive channel Bend Range.
The Bend Range used for transmission by the GI-10
can be set to 0, 2, 12 or 24. Select the largest value
which is supported by your MIDI sound generator.
3. Seiect the sound.
Select the sound to be played on the MIDI receive
channel.
For details on setting up, refer to the manual that
came with your MIDI sound generator.
<Setting the GI-10 >
1. Set the play mode to GK.
Press the PARAMETER + or — button to select
the P. PLAY MODE.
Press the VALUE + or — button to change the
play mode.
2.Set the MIDI transmit channel to match the
external MIDI sound generator’s MIDI receive
channel.
Press the PARAMETER + or — bution to select
C. MIDI CH.
Press the VALUE + or — button to set the MIDI
transmit channel.