Roland EDIROL UM-880 Manual Download

Page: 51 / 64

MIDI Implimentation

1. Receive data

■

Channel Voice Messages

●

Note off

Status

2nd byte

BFH

ppH

pp = memory number:

01H – 08H (Memory 1 - Memory 8)

Used to switch patches.

When using Patch Change or system exclusive to change the current patch, the
UM-880 will require up to 200 milliseconds of processing time in order to
process the changes. When changing the current patch of the UM-880 from a
sequencer, please allow an interval of 200 ms or more before the next data.

■

System Exclusive Message

●

Data transmission

The UM-880 can use Exclusive messages to transmit internal settings to other devices.
There are two types of Exclusive data transmission;

Individual Parameter

Transmission

(p. 52) in which single parameters are transmitted one by one, and

Bulk Dump Transmission

(p. 54) in which a large amount of data is transmitted at

once.

❍

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. There are two types of request;
Individual Parameter Request which requests data for an individual parameter,
and Bulk Dump Request which requests a large amount of data at once. In either
case, the “Data Request 1 (RQ1)” message format is used, and the Address and Size
included in the message determine the type and amount of data that is desired.
For Individual Parameter Request,

Individual Parameter Transmission

(p. 52)

For Bulk Dump Request, refer to

Bulk Dump

(p. 54)

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, 10H, 00H, 49H, 11H, 0AH, 00H, 00H, ssH, sum

F7H

Byte

Explanation

F0H

Exclusive status

41H

ID number (Roland)

10H

Device ID

00H

UM-880 ID MSB

49H

UM-880 ID LSB

11H

Command ID (RQ1)

0AH

Address MSB: upper byte of the starting address of the requested

data

00H

Address LSB:

lower byte of the starting address of the requested
data

00H

Size MSB

ssH

Size LSB

sum

Checksum

F7H

EOX

(End Of Exclusive)

The amount of data that can be transmitted at one 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

Individual Parameter Transmission

(p.

52)

Regarding the checksum, please refer to

Section 5

(p. 56)

❍

Data set 1 DT1 (12H)

This is the message that actually performs data transmission, and is used when you
wish to transmit the data.

Status

Data byte

Status

F0H

41H, 10H, 00H, 49H, 12H, aaH, bbH, ccH, sum

F7H

Byte

Explanation

F0H

Exclusive status

41H

ID number (Roland)

10H

Device ID

00H

UM-880 ID MSB

49H

UM-880 ID LSB

12H

Command ID (DT1)

aaH

Address MSB: upper byte of the starting address of the transmitted

data

bbH

Address LSB:

lower byte of the starting address of the transmitted
data

ccH

Data:

the actual data to be transmitted. Multiple bytes of
data are transmitted starting from the address.

sum

Checksum

F7H

EOX

(End Of Exclusive)

The amount of data that can be transmitted at one time depends on the type of
data, and data can be received only from the specified starting address and size.
Refer to the Address and Size given in

Individual Parameter Transmission

(p.

52)

Data larger than 128 bytes must be divided into packets of 128 bytes or less. If
“Data Set 1” is transmitted successively, there must be an interval of at least 40
ms between packets.

Regarding the checksum, please refer to

Section 5

(p.56)

❍

Bulk Dump Format

Internal parameters of the UM-880 will be transmitted and received.

Status

Data byte

Status

F0H

41H, 10H, 00H, 49H, 12H, 0AH, 00H, Data0,...,Data24, sum

F7H