Specifications

B-6 File Format
Here is a discussion of various fields:
bBlockID
The Block Type identifier is 3.
nBlockLen
Length of the block (in bytes), excluding the bBlockID and nBlockLen
fields.
The value is 3.
wPausePeriod
This is a 2-byte field which specifies the pause period in units of
sampling cycles. Total pause cycle is wPausePeriod plus 1.
bTimeConstant
This is a 1-byte field which indicates the Time Constant of the pause
period. The Time Constant calculation is the same as described in Block
Type 1.
Block Type 4
This is a special block that specifies a Marker in the digitized sound data. The
Block Header is organized as follows:
BYTE bBlockID; // == 4
BYTE nBlockLen[3]; // 3-byte block length
WORD wMarker; // marker value
Here is a discussion of various fields:
bBlockID
The Block Type identifier is 4.
nBlockLen
Length of the block (in bytes), excluding the bBlockID and nBlockLen
fields.
The value is 2.
wMarker
This is a 2-byte field which specifies the marker value. The marker value
can be any value between 1 to 0FFFE hex inclusive. The 0 and 0FFFF
hex values are reserved by the digitized sound drivers.