Subfunction 23 : Play a sample

 AH    = 82
 AL    = 23
 DX:CX = Buffer with the folowing data
 If the function is successful, AX will hold 5722h on return.

 ┌────────┬────────┬────────────────────────────────────────────────────────┐
 │ Offset │ Length │ Description                                            │
 ├────────┼────────┼────────────────────────────────────────────────────────┤
 │   00   │  Byte  │ This byte must be set to 'S'.                          │
 │   01   │  Byte  │ This byte must be set to 'P'.                          │
 │   02   │  Word  │ This word holds the segment of the sample to be        │
 │        │        │ played. The sample data must therefore be paragraph    │
 │        │        │ aligned. The sample data, is the data described in     │
 │        │        │ section 6 of the MOD file structure above.             │
 │   04   │  Word  │ The length of the sample. In old versions of MODRES,   │
 │        │        │ this length was in bytes (limiting the length of       │
 │        │        │ samples to 64K). In new versions, this length is in    │
 │        │        │ words. For both cases the length must be in 8086       │
 │        │        │ format as opposed to the Amiga format in which it is   │
 │        │        │ stored in the MOD file.                                │
 │   06   │  Byte  │ Output device number - see description at offset 02 of │
 │        │        │ subfunction 20h.                                       │
 │   07   │  Word  │ This word holds a value corresponding to the frequency │
 │        │        │ of the note to be played. See section 5 of the MOD     │
 │        │        │ file docs for a description of how the frequency is    │
 │        │        │ represented.                                           │
 ├────────┼────────┼────────────────────────────────────────────────────────┤
 │   09   │  Byte  │ This byte is used to specify the volume at which the   │
 │        │        │ sample is to be played. If the value is not zero, it   │
 │        │        │ is decremented and then used as a multiplier (in six-  │
 │        │        │ teenths). A value of 2, for example, will multiply the │
 │        │        │ volume by 1/16; 3 will multiply by 2/16, etc. Zero and │
 │        │        │ one produce the same effect - no volume at all.        │
 │   10   │  Word  │ This is the loop start (if the loop length is greater  │
 │        │        │ than or equal to 4). This value is an offset in words  │
 │        │        │ ans is in 8086 format.                                 │
 │   12   │  Word  │ If this value is less than 4 then the sample does not  │
 │        │        │ loop, otherwise this is the loop length. This value is │
 │        │        │ measured in words and is in 8086 format.               │
 │   14   │  Byte  │ This byte is used to specify the quality of sound      │
 │        │        │ output required. It can have a value in the range 0 to │
 │        │        │ 6 - the lower the value, the better the quality. Note, │
 │        │        │ however, that you will need a fast machinve to use the │
 │        │        │ low values without crashing. A value of 1 is assumed   │
 │        │        │ if an out of range value is specified.                 │
 └────────┴────────┴────────────────────────────────────────────────────────┛

 Note that bytes 9 to 14 were not available in the old versions of MODRES.