Akai MPC 3000 Operator's Manual page 263

MPC3000 Software Update Version 3.1 Operator's Manual
"<<", "<", LOCATE, ">", and ">>": In addition to their normal
MPC3000 functions, these keys cause MMC "Locate" commands to
be sent out, repositioning the external recorder.
RECORD + PLAY pressed together: This does not enter record
mode on the MPC3000's sequencer. Instead, it sends an MMC "Record
strobe" command to the external recorder, causing it to enter record
mode.
Whenever an MMC command is sent, the bottom line of the screen briefly
displays a message indicating that the command was sent.
MMC is most useful if the MPC3000 is also set to respond to SMPTE or MIDI
Time Code from the external recorder. This allows the MPC3000 not only to
remotely control the external recorder's transport functions, but also for both
devices to play in sync. (To learn how to set the MPC3000 to receive incoming
SMPTE or MIDI Time Code sync, read the chapter of the operator's manual:
"Syncing to tape and other devices".)
If both MMC is on and the MPC3000 is receiving SMPTE or MTC sync from
the external recorder, the PLAY, STOP and PLAY START keys act as follows:
PLAY: When pressed, the external recorder starts playing, causing
its sync signal to be sent. When the MPC3000 receives the sync sig-
nal, it starts playing in sync.
STOP: When pressed, the external recorder stops playing, causing
its outgoing sync signal to stop. When the MPC3000 stops receiving
sync, it stops playing.
PLAY START: When pressed, the external recorder repositions to
the start of the song and starts playing, causing its sync signal to be
sent. When the MPC3000 receives the sync signal, it starts playing
in sync.
When using MMC, it is useful to quickly turn MMC on or off. For example,
you may want to quickly turn MMC off in order to hear the MPC3000 play
alone, then turn it back on in order to play both devices together. As the MMC
screen shows, a shortcut has been provided for this purpose: from the Play/
Record or Song screens, hold the STOP key and press PLAY.
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