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8.Data
8.Data
43
8. Appendices
About MIDI
1. MIDI channels
Similarly to a television, data can be received when the channel
of the receiving device matches the channel on which the data
is being transmitted.
The transmit/receive channel of the EA-1 is set by the MIDI
channel setting in MIDI mode.
2. Note-on/off
When you use the Keyboard function and press a step key, the
note number assigned to that step key will be transmitted as a
Note-on message [9n, kk, vv] (n: channel, kk: note number, vv:
velocity) on the MIDI channel specified for that part. On the
EA-1, the vv: velocity value is fixed at 64H (100). When you
release the step key, a note-off message [8n, kk, vv] is transmit-
ted. However, most devices do not transmit note-off velocity,
and neither does the EA-1. When note-on/off messages are re-
ceived on the MIDI channel assigned to a part, that part will
sound.
Note-on/off messages are transmitted and received on the MIDI
channels that you specify for part 1 and part 2 in MIDI mode.
3. Switching patterns
When you switch patterns, Program Change and Bank Select
messages [Bn, 00, mm] (control change #00), [Bn, 20, bb] (con-
trol change #32) (mm: bank number upper byte, bb: bank num-
ber lower byte, together allowing 16,384 banks to be selected)
will be transmitted.
If a Program Change is received on the MIDI channel of the
EA-1, patterns will be switched within the same group (e.g.,
from A01 to A02). After a Bank Select has been received, the
next-received Program Change will be able to switch to a pat-
tern of a different group (e.g., from A01 to C01).
Transmission and reception of Program Change messages can
be controlled by the MIDI mode MIDI Filter setting.
Bank Select
Program Change Pattern number
MSB LSB
00 00 0...127 A01...b64
00 01 0...127 C01...d64
4 Applying pitch bend
Pitch bend messages [En, vv, vv] (vv, vv: lower and upper bytes
of the value, together expressing 16,384 steps, where 8192 (vv,
vv = 00H, 40H) is the center value) are not transmitted, but can
be received to apply a pitch bend effect. The range of pitch bend-
ing is specified by the Pitch Bend Range setting of MIDI mode.
5. Using NRPN messages to edit
NPRN (Non Registered Parameter No.) messages are messages
to which manufacturers are free to assign their own functions.
On the EA-1, NRPN messages are assigned to all knobs and
keys of the Synthesizer section other than Motion Seq.
To edit, first use NRPN (LSB) [Bn, 62, rr] and NRPN (MSB) [Bn,
63, mm] (control change #98 and 99) (rr, mm: lower and upper
bytes of the parameter no.) to select the parameter. Then trans-
mit Data Entry (MSB) [Bn, 06, mm] and Data Entry (LSB) [Bn,
26, vv] (control change #06 and 38) (mm, vv: upper and lower
bytes of the value, together expressing 16,384 steps) to set the
value. The EA-1 uses only the MSB value (128 steps) of the Data
Entry message.
6. If "stuck notes" occur
If for some reason a note fails to stop sounding, you can usually
switch modes to stop the sound. If a note played via MIDI fails
to stop, you can simultaneously press the Shift key and the Stop/
Cancel key to perform a MIDI Reset.
7. About synchronization
Two or more sequencers can be connected via MIDI and made
to playback in synchronization. Messages used for synchroni-
zation (realtime messages) include Timing Clock [F8], Start [FA],
Continue [FB], and Stop [FC].
In a synchronized system, one synthesizer (the master) will
transmit these messages, and the other sequencer(s) (the slave(s))
will receive these messages. The slave devices will playback
according to the tempo specified by the Timing Clock messages
transmitted by the master. Twenty-four Timing Clock messages
are transmitted for each quarter note. When the EA-1’s Global
mode parameter Clock is set to INT, it will be the master de-
vice, and will transmit these realtime messages. When Clock is
set to EXT, it will be the slave device, and will receive these
realtime messages. However even when Clock is set to EXT, the
EA-1 will operate according to its own internal clock if no Tim-
ing Clock messages are being received. The Start message speci-
fies when playback will begin. When the Start/Pause key is
pressed on the master device, it will transmit a Start message.
Slave devices that receive this Start message will synchronize
to the Timing Clock messages subsequently received, and will
begin playback from the beginning. If the Start/Pause key is
pressed on the master devices when it is paused, the master
will transmit a Continue message. When a slave device receives
the Continue message, it will resume playback from the point
where it is currently stopped. If the Stop key is pressed during
playback, the master will transmit a Stop message. Slave de-
vices will stop playback when they receive a Stop message.
8. Synchronization in Song mode
In Song mode, the EA-1 can transmit and receive Song Select
and Song Position Pointer messages. When you switch songs, a
Song Select [F3 ss] message will be transmitted (ss: song num-
ber, where one of 128 songs can be selected. On the EA-1 you
can select 16 songs.) If the EA-1 receives a Song Select message
in Song mode, it will switch songs. Transmission and reception
of Song Select messages can be restricted by the MIDI Filter
settings of MIDI mode. If you change the current position on
the master device (i.e., the device whose Clock is set to INT)
when the song is stopped, a Song Position Pointer message [F2
pp pp] will be transmitted. (pp: the number of MIDI beats from
the beginning of the song; i.e., the number of Timing Clocks
divided by six.) Song Position Pointer indicates the location at
which the sequencer is currently stopped. When Song Position
Pointer is received in Song mode by a slave device (i.e., a de-
vice whose Clock is set to EXT), it will change the location at
which its song is currently stopped to match the location of the
master. However on the EA-1, the length of each pattern may
be different, so the master and slave will not necessarily be in