home *** CD-ROM | disk | FTP | other *** search
-
- Creative Voice (VOC) file format
- --------------------------------
-
- HEADER (bytes 00-19)
- Series of DATA BLOCKS (bytes 1A+) [Must end w/ Terminator Block]
-
- ----------------------------------------------------------------
-
- HEADER:
- =======
- byte # Description
- ------ ------------------------------------------
- 00-12 "Creative Voice File"
- 13 1A (eof to abort printing of file)
- 14-15 Offset of first datablock in .voc file (std 1A 00
- in Intel Notation)
- 16-17 Version number (minor,major) (VOC-HDR puts 0A 01)
- 18-19 2's Comp of Ver. # + 1234h (VOC-HDR puts 29 11)
-
- ----------------------------------------------------------------
-
- DATA BLOCK:
- ===========
-
- Data Block: TYPE(1-byte), SIZE(3-bytes), INFO(0+ bytes)
- NOTE: Terminator Block is an exception -- it has only the TYPE byte.
-
- TYPE Description Size (3-byte int) Info
- ---- ----------- ----------------- -----------------------
- 00 Terminator (NONE) (NONE)
- 01 Sound data 2+length of data *
- 02 Sound continue length of data Voice Data
- 03 Silence 3 **
- 04 Marker 2 Marker# (2 bytes)
- 05 ASCII length of string null terminated string
- 06 Repeat 2 Count# (2 bytes)
- 07 End repeat 0 (NONE)
- 08 Extended 4 ***
-
- *Sound Info Format: **Silence Info Format:
- --------------------- ----------------------------
- 00 Sample Rate 00-01 Length of silence - 1
- 01 Compression Type 02 Sample Rate
- 02+ Voice Data
-
- ***Extended Info Format:
- ---------------------
- 00-01 Time Constant: Mono: 65536 - (256000000/sample_rate)
- Stereo: 65536 - (25600000/(2*sample_rate))
- 02 Pack
- 03 Mode: 0 = mono
- 1 = stereo
-
-
- Marker# -- Driver keeps the most recent marker in a status byte
- Count# -- Number of repetitions + 1
- Count# may be 1 to FFFE for 0 - FFFD repetitions
- or FFFF for endless repetitions
- Sample Rate -- SR byte = 256-(1000000/sample_rate)
- Length of silence -- in units of sampling cycle
- Compression Type -- of voice data
- 8-bits = 0
- 4-bits = 1
- 2.6-bits = 2
- 2-bits = 3
- Multi DAC = 3+(# of channels) [interesting--
- this isn't in the developer's manual]