Retrieving
the Sequence Division Type
The division
type of a MIDI sequence determines the amount of time between MIDI events
in the sequence. To determine the division type of a sequence, use the MCI_STATUS command and set the dwItem
member of the MCI_STATUS_PARMS structure to MCI_SEQ_STATUS_DIVTYPE .
If the MCI_STATUS
command is successful, the dwReturn member of the MCI_STATUS_PARMS
structure will contain one of the following values to indicate the division
type.
|
Value |
Division
type |
|
MCI_SEQ_DIV_PPQN |
PPQN (parts-per-quarter
note) |
|
MCI_SEQ_DIV_SMPTE_24 |
SMPTE, 24
fps (frames per second) |
|
MCI_SEQ_DIV_SMPTE_25 |
SMPTE, 25
fps |
|
MCI_SEQ_DIV_SMPTE_30 |
SMPTE, 30
fps |
|
MCI_SEQ_DIV_SMPTE_30DROP |
SMPTE, 30
fps drop frame |
You must know
the division type of a sequence to change or query its tempo. You cannot change
the division type of a sequence by using the MCI sequencer.