home *** CD-ROM | disk | FTP | other *** search
- --------S-GF1 PATCH-------------------------
-
- The GF1 Patch files are multipart sound files for the Gravis Ultrasound
- sound card to emulate MIDI sounds in high quality. Each Patch can
- consist of many samples (for example, a string ensemble consists of
- Violin, Viola, Cello, Bass) which are played depending on the note to
- play. A patch can also contain a part to be played before the loop and a
- part to be played after the tone has been released.
-
- OFFSET Count TYPE Description
- 0000h 12 char ID='GF1PATCH110'
- 000Ch 10 char Manufacturer ID
- 0018h 60 char Description of the contained Instruments
- or copyright of manufacturer.
- 0054h 1 byte Number of instruments in this patch
- 0055h 1 byte Number of voices for sample
- 0056h 1 byte Number of output channels
- (1=mono,2=stereo)
- 0057h 1 word Number of waveforms
- 0059h 1 word Master volume for all samples
- 005Bh 1 dword Size of the following data
- 0060h 36 byte reserved
-
- Following this header, the instruments with their headers follow. An
- instrument header contains the name and other data about one instrument
- contained within the patch.
-
- OFFSET Count TYPE Description
- 0000h 1 word Instrument number. ?Maybe the MIDI instrument
- number?. In the Gravis patches, this is 0, in
- other patches, I found random values.
- 0002h 16 char ASCII name of the instrument.
- 0012h 1 dword Size of the whole instrument in bytes.
- 0016h 1 byte Layers. Needed for whatever.
- 0017h 40 byte reserved
-
- About the patch, I don't know anything. Maybe somebody could enlighten
- me. Each patch record has the following format :
-
- OFFSET Count TYPE Description
- 0000h 7 char Wave file name
- 0007h 1 byte Fractions
- 0008h 1 dword Wave size.
- Size of the wave digital data
- 000Ch 1 dword Start of wave loop
- 0010h 1 dword End of wave loop
- 0012h 1 word Sample rate of the wave
- 0014h 1 word Minimum frequency to play the wave
- 0016h 1 word Maximum frequency to play the wave
- 0018h 1 dword Original sample rate of the wave data
- 001Ch 1 int Fine tune value for the wave
- 001Eh 1 byte Stereo balance, values unknown**
- 001Fh 6 byte Filter envelope rate
- 0025h 6 byte Filter envelope offse
- 002Bh 1 byte Tremolo sweep
- 002Ch 1 byte Tremolo rate
- 002Dh 1 byte Tremolo depth
- 002Fh 1 byte Vibrato sweep
- 0030h 1 byte Vibrato rate
- 0031h 1 byte Vibrato depth
- 0032h 1 byte Wave data, bitmapped
- 0 - 8/16 bit wave data
- 1 - signed/unsigned data
- 2 - de/enable looping
- 3 - no/has bidirectional looping
- 4 - loop forward/backward
- 5 - Turn envelope sustaining off/on
- 6 - Dis/Enable filter envelope
- 7 - reserved
- 0033h 1 int Frequency scale, whatever that means
- 0035h 1 word Frequency scale factor
- 0037h 36 byte Reserved
-
- EXTENSION:PAT
- OCCURENCES:PC
- PROGRAMS:Patch Maker
- SEE ALSO:VOC,WAVe
-