Notes On Mdr Data Reception And Transmission - Yamaha MDF3 Owner's Manual

Notes on MDR Data Reception and Transmission

Reception
MDR file size:
On a newly formatted 2HD disk, a single
MDR data file can hold up to about 1,200 kilobytes of
data. When using a disk that already contains several files,
check the amount of available space on the disk (page
57) before you try to receive the bulk data.
Bulk data blocks:
The MDF3 recognizes bulk data blocks
by their header (System Exclusive status: F0H) and footer
(End of Exclusive: F7H) values.
Block intervals:
When the MDF3 creates MDR files, it
also records timing data at 10 millisecond intervals. If the
interval between any two data blocks exceeds one sec-
ond, the MDF3 will record it as one second. When re-
ceiving data from a MIDI device that will require inter-
vals greater than one second between blocks when you
attempt to transmit the data back to the device, record
the bulk data in SEQ mode. (Refer to "Recording bulk
data" on page 38)
Transmission
MDR file formats:
In addition to its own files, the MDF3
is capable of transmitting bulk data files which other de-
vices save to disk using Standard MIDI File format 0. More-
over, it can transmit MDR bulk data files written by the
Yamaha MDF2 and the QX3 in that device's MDR mode.
It distinguishes between these two types of files by check-
ing the header of each file before it begins transmitting
the data in the file.
Transmitting QX3 data:
MDR data files written to a disk by the QX3, it will auto-
matically insert a 100 millisecond interval after every data
block, as well as after each kilobyte of data (when a block
is longer than one kilobyte).
When the MDF3 transmits
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