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????? Velvet Studio. AMS Format v2.2 ??????
Advanced Module System
Offs Byte(s).Desc
[Header]
0 7 Header: "AMShdr",1ah
7 1 Length of ModName (max 30 bytes)
8 x ModName
? 2 Version of format (Hi = MainVer, Low = SubVer e.g. 0202 = 2.2)
+2 1 Nr of Instruments (0-255)
+3 2 Nr of Patterns (1-1024)
+5 2 Nr of Positions (1-65535)
+7 2 Initial BPM (High byte=Integer part, Low byte=Fraction)
+9 1 Initial Speed
+10.1.Default Channels (1-32)
+11.1.Default Commands (1-7)
+12.1.Default.Rows (0-255)
+13 2 Flags:uuuuuuuumfsuuuuu
????????????????? Unused
?????????????????.1=Stereo,0=Mono
????????????????? Use Linear freq table.
????????????????? MIDI channels are used in tune.
.. ????????????????? Unused
[Instrument]
1 Length of InstrumentName (max 30 bytes)
x Instrument name
1 Number of samples in instrument (0-16) (if 0, skip this inst.)
120 Inst number for all notes
1 Volume Env. Speed
1 Volume sustain point
1 Volume loop start point
1 Volume loop end point
1 Number of volume points (0-63)
x*3 Volume envelope info.
uuuuuttx xxxxxxxx yyyyyyyy
???????? ???????? ????????? Volume (0-7f)
??????????????????????????? Delta X
??????????????????????????? Curve (0=Line,1=sine 1, 2=sine 2)
??????????????????????????? Reserved for future use.
1 Panning Env. Speed
1 Panning sustain point
1 Panning loop start point
1 Panning loop end point
1 Number of panning points (0-63)
x*3 Points for panning envelope
uuuuuttx xxxxxxxx yyyyyyyy
???????? ???????? ????????? Pan value (0-ff)
??????????????????????????? Delta X
??????????????????????????? Curve (0=Line,1=sine 1, 2=sine 2)
??????????????????????????? Reserved for future use.
1 Vibrato Env. Speed
1 Vibrato sustain point
1 Vibrato loop start point
1 Vibrato loop end point
1 Number of vibrato points (0-63)
x*3 Points for vibrato envelope
uuuuuttx xxxxxxxx yyyyyyyy
???????? ???????? ????????? Vibrato depth (0-ff)
??????????????????????????? Delta X
??????????????????????????? Curve (0=Line,1=sine 1, 2=sine 2)
??????????????????????????? Reserved for future use.
1 Shadow Instrument. If non-zero, the value=the shadowed inst.
2 Vib.Amplify+Volume fadeout
fedcba9876543210
???????????????? Volume Fadeout.
???????????????? Vibrato Amplify
???????????????? Reserved
2 Envelope flags:
fedcba9876543210
???????????????? Volume :Loop on
???????????????? Volume :Sustain on
???????????????? Volume :Envelope on
???????????????? Panning:Loop on
???????????????? Panning:Sustain on
???????????????? Panning:Envelope on
???????????????? Vibrato:Loop on
???????????????? Vibrato:Sustain on
???????????????? Vibrato:Envelope on
???????????????? Volume :Break Loop
???????????????? Panning:Break Loop
???????????????? Vibrato:Break Loop
???????????????? Reserved
[Sample] (repeated for each sample in the Instrument)
1 Length of SampName (max 22 bytes)
x SampName
4 Length Of Sample (if 0, skip this sample.)
.4.Repeat Start for sample
.4.Repeat End for sample
2 Sampled rate (the rate the sample is sampled in)
.1.Hi Nibble=PanPosition, Lo Nibble=FineTuneValue
2 SampleRate for C-4 (normally 8363Hz)
1 Relative note (signed byte)
1 Volume (0-127)
1 Info Byte 76543210
????????? Reserved
????????? 16 bit sample
????????? Looped sample
????????? PingPong loop
????????? Reserved
????????? Direction (1=Reversed)
????????? Reserved
Data for rest of Instruments are exactly the same!
[Text]
1 Length of Composer name (max 30 bytes)
x Composer Name
?>1 Length of ChannelName (max 11 bytes)
??x ChannelName
4 Length of Description (packed, inclusive header)
4 Length of Description (unpacked)
1 Version of packroutine (currently 01h)
1 PreProcessing type (currently none)
1 Packing method (Currently RLE with #255 as packbyte)
x Description of Module
The Number of ChannelNames are always 32.
[PatternOrder]
.x.PatternNr. Holds number (0-65535) to tell the tracker what
pattern to play at that position (x=Nr of Positions)
[PatternData]
.4.PatternSize (packed)
1 PatternLength-1 (0-255)
1 cccsssss
c = Nr of Commands used in pattern
s = Nr of Channels-1 used in pattern (0-31)
1 Length of PatternName (max 10 bytes)
x PatternName
x PatternData
fp0aaaaa ennnnnnn iiiiiiii [rgcccccc bbbbbbbb...]
..Legend:
f 1=Last data chunk on the row.
p 0=Read Note+InstNr 1=Don't Read Note+Instnr
a Channel (0-31)
e 1=Read one command
n Note. 2-121 (C-0 to B-9), 1=Key off note.
i InstrumentNr (0-255)
r 1=Read one more command
g 1=Low 6 bits are volume/2
c Command-nr
b Command-byte
If first byte = -1 then this row is empty
..If g is set, the command only consist of that byte and
..the low 6 bits are assumed to be a volume command. You
..have to multiply the volume by 2 to get the proper value
(Volume will only be stored this way if it's even)
[Samples]
All samples stored after eachother, packed with a special packing
method not described here since we're so lazy! You've got a routine
that does the unpacking instead. (You can also save the samples
unpacked, and it that case they are in twos complement form.)
** MIDI not yet supported. If MIDI Bit=0 then skip this section **
[MIDI Section]
4 MIDI Section Size
????? Velvet Studio. AIS Format v1.0 ??????
Advanced Instrument System
The only that differs the AIS format from the Instrument used in the AMS is
the following header before the other info:
Offset bytes Desc
0 7 Header: "AIShdr",1ah
7 1 Type: 0aah=new version, <1fh=old version (Only new versions
should exist, so don't bother with this flag)
8 2 Version of format (Hi = MainVer, Low = SubVer e.g. 0100 = 1.0)
The actual sampledata is stored right after the Instrument data.
????? Velvet Studio ASE Format v1.0 ??????
Advanced Sample System
Offset Bytes Desc
0.7 Header: "ASEhdr",1ah
7.2 Version of format (Hi = MainVer, Low = SubVer e.g. 0100 = 1.0)
9.1.Length of SampName (max 22 bytes)
10.x.SampName
.4.Length Of Sample
.4.Repeat Start for sample
.4.Repeat End for sample
.2.Sampled rate (the rate the sample is sampled in)
.1.Hi Nibble=PanPosition, Lo Nibble=FineTuneValue
.2.SampleRate for C-4 (normally 8363Hz)
.1.Relative note (signed byte)
.1.Volume (0-127)
.1.Info Byte 76543210
????????? Reserved
????????? 16 bit sample
????????? Looped sample
????????? PingPong loop
????????? Reserved
????????? Direction (1=Reversed)
????????? Reserved
.x.Sample data. Maybe packed.
????== Velvet Studio Misc Info ==????