•Song Position Point

This message tell the connected sequencer to move the current location in the song.

With the SPD-20, you can return to the first measure of a sequencer song by striking the pad (p. 61).

•Active sensing

These messages are used to monitor the integrity of MIDI connections. If no MIDI messages are
received within a specific length of time, the device assumes that the connection has been broken (e.g., a
cable disconnected) and will reset itself according to a specific procedure.
How to Read the MIDI Implementation Chart
MIDI has made it possible for a wide variety of devices to exchange information, but it is not always
true that all types of MIDI messages can be exchanged between all types of devices.
To help you quickly determine what types of MIDI messages can be exchanged between master and
slave, the manual of each MIDI device includes a MIDI Implementation chart. By looking at this chart,
you can quickly see what messages the device is able to transmit and receive. MIDI Implementation
charts are standardized, so you can fold the charts together to see at a glance how the two devices will
communicate.
fig.68

A MIDI Implementation chart for the SPD-20 is included in page 102 .

MEMO
Function
Transmitted Recognized
Remarks
MIDI Implementation
Chart for the receiver
MIDI Implementation
Chart for the transmitter
MEMO
60