Table of Contents
Advertisement
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
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
II, the vv: velocity value is fixed at 64H (100). When you
mk
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
mk
received 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
II, patterns will be switched within the same group (e.g.,
mk
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
MSB
LSB
00
00
0...127
00
01
0...127
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
II, NRPN messages are assigned to all knobs and
mk
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
II is set by the MIDI
mk
II. When note-on/off messages are
Pattern number
A01...b64
C01...d64
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
II uses only the MSB value (128 steps) of the
mk
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
bal mode parameter Clock is set to INT, it will be the master
device, 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
II will operate according to its own internal clock if no
EA-1
mk
Timing Clock messages are being received. The Start message
specifies 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
II can transmit and receive Song Se-
mk
lect and Song Position Pointer messages. When you switch
songs, a Song Select [F3 ss] message will be transmitted (ss: song
number, where one of 128 songs can be selected. On the EA-
II you can select 16 songs.) If the EA-1
1
mk
Select message in Song mode, it will switch songs. Transmis-
sion and reception of Song Select messages can be restricted by
the MIDI Filter settings of MIDI mode. If you change the cur-
rent 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 lo-
cation at which the sequencer is currently stopped. When Song
Position Pointer is received in Song mode by a slave device (i.e.,
a device 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
tern may be different, so the master and slave will not necessar-
ily be in the same location. When the Start/Pause key is pressed
8.Data
II's Glo-
mk
II receives a Song
mk
II, the length of each pat-
mk
43
Advertisement
Table of Contents
