100
MIDI Implementation

●OMNI OFF (Controller number 124)

Status 2nd byte 3rd byte
BnH 7CH 00H
n = MIDI channel number:0 H - FH (ch.1 - ch.16)
* The same processing will be carried out as when All Notes Off is received.

●OMNI ON (Controller number 125)

Status 2nd byte 3rd byte
BnH 7DH 00H
n = MIDI channel number: 0H - FH (ch.1 - ch.16)
* The same processing will be carried out as when All Notes Off is received.

●MONO (Controller number 126)

Status 2nd byte 3rd byte
BnH 7EH mmH
n = MIDI channel number: 0H - FH (ch.1 - ch.16)
mm = mono number: 00H - 10H (0 - 16)
* The same processing will be carried out as when All Sound Off or All Notes Off is
received.

●POLY (Controller number 127)

Status 2nd byte 3rd byte
BnH 7FH 00H
n = MIDI channel number: 0H - FH (ch.1 - ch.16)
* The same processing will be carried out as when All Sound Off or All Notes Off is
received.

■System Realtime Message

* Following System Realtime Messages cannot be recorded in recording mode.

●Timing Clock

Status
F8H
* Recognized only when the [SYSTEM]-(UTILITY) Seq Sync is set to "Ext".

●Start

Status
FAH
* Recognized only when the [SYSTEM]-(UTILITY) Seq Sync is set to "Ext" or "Remote".

●Continue

Status
FBH
* Recognized only when the [SYSTEM]-(UTILITY) Seq Sync is set to "Ext" or "Remote".

●Stop

Status
FCH
* Recognized only when the [SYSTEM]-(UTILITY) Seq Sync is set to "Ext" or "Remote".

●Active Sensing

Status
FEH
* When Active Sensing is received, the unit will begin monitoring the intervals of all
further messages. While monitoring, if the interval between messages exceeds about 420
ms, the same processing will be carried out as when All Sounds Off, All Notes Off and
Reset All Controllers are received, and message interval monitoring will be halted.

■System Exclusive Message

* Following System Exclusive Messages cannot be recorded.
Status Data byte Status
F0H iiH, ddH, ......, eeH F7H
F0H: System Exclusive Message status
ii = ID number: an ID number (manufacturer ID) to indicate the manufacturer whose
Exclusive message this is. Roland’s manufacturer ID is 41H.
ID numbers 7EH and 7FH are extensions of the MIDI standard;
Universal Non-realtime Messages (7EH) and Universal Realtime
Messages (7FH).
dd,..., ee = data: 00H - 7FH (0 - 127)
F7H: EOX (End Of Exclusive)
The System Exclusive Messages received by the normal mode of HPD-15 are; Universal
Non-realtime System Exclusive Messages, Data Requests (RQ1), and Data Set (DT1).

●Universal Non-realtime System Exclusive Messages

❍Identity Request

Status Data byte Status
F0H 7EH, dev, 06H, 01H F7H
Byte Explanation
F0H Exclusive status
7EH ID number (universal non-realtime message)
dev Device ID (dev:00H - 1FH (1 - 32) Initial value is 10H (17))
06H, 01H Identity request
F7H EOX (End Of Exclusive)
* Even if the Device ID is 7FH (Broadcast), Identity reply message will be transmitted.
* When Identity Request is received, Identity reply message will be transmitted (p. 104).

●Data transmission

HPD-15 can transmit and receive the various parameters using System Exclusive messages.
The exclusive message of HPD-15's data has a model ID of 00H 2EH and a device ID of 10H
(17). Device ID can be changed in HPD-15.

❍Request data 1 RQ1 (11H)

This message requests the other device to send data. The Address and Size determine the
type and amount of data to be sent.
When a Data Request message is received, if the device is ready to transmit data and if the
address and size are appropriate, the requested data will be transmitted as a "Data Set 1
(DT1)" message. If not, nothing will be transmitted.
Status Data byte Status
F0H 41H, dev, 00H, 2EH, 11H, aaH, bbH, F7H
ccH, ddH, ssH, ttH, uuH, vvH, sum
Byte Explanation
F0H Exclusive status
41H ID number (Roland)
dev Device ID (dev: 00H - 1FH (1 - 32) Initial value is 10H (17))
00H 2EH Model ID (HPD-15)
11H Command ID (RQ1)
aaH Address MSB: upper byte of the starting address of the requested data
bbH Address 2nd: 2nd byte of the starting address of the requested data
ccH Address 3rd: 3rd byte of the starting address of the requested data
ddH Address LSB: lower byte of the starting address of the requested data
ssH Size MSB
ttH Size 2nd
uuH Size 3rd
vvH Size LSB
sum Checksum
F7H EOX (End Of Exclusive)
* The amount of data that can be transmitted at once time will depend on the type of data,
and data must be requested using a specific starting address and size. Refer to the
Address and Size listed in "Parameter Dump Request" (p. 108).
* Regarding the checksum please refer to p. 109.