smp(4)

NAME
     smp, SampleVision - Sample Vision Audio File Format

SYNOPSIS
     #include <dmedia/audiofile.h>

DESCRIPTION
     The Audio File Library currently supports 13 of the commonly found audio
     file formats, i.e., is able to recognize, read, and write sample data and
     header information to and from files in these formats.  It is important
     not to confuse sample or audio data formats with file formats.  The
     former refers to the bit-wise organization of the sound samples in the
     file, i.e., whether the format is 8-bit integer or 16-bit unsigned, etc.
     Audio file format refers to the structure of the audio file header, the
     chunk of on-disk data which preceeds the samples and which provides
     information about the file to the audio program.  A single audio file
     format may support a large variety of sample formats.

     The Sample Vision File Format (smp) was developed for use with the Sample
     Vision software program, which was designed to send and receive samples
     via the MIDI interface on a PC.  It consists of a variable-length header
     followed by a contiguous block of binary data representing the sound
     samples.

DATA FORMAT SPECIFICATIONS
     Sample Formats:
          Two's complement integer only.

     Sample Widths:
          16 bit only.

     Byte Orders:
          Always littleendian.

     Channel Counts:
          1 channel only.

     Compression Formats:
          None.

FILE FORMAT SPECIFICATIONS
     SMP file headers contain additional information.

     Instrument Configurations:
          Maximum of 1 allowed.  Up to eight loops are allowed.  Instparams
          associated with this inst:  AF_INST_MIDI_BASENOTE only.   See
          afSetInstParamLong(3dm) for more information about these parameters.

     Markers:
          Unlike AIFF(3dm) and WAVE(3dm) files, there is no direct association
          between markers and loops.  However, for backwards compatibility, an
          application may choose to specify loop start and end points via the
          traditional AIFF-style method using mark id's (afSetLoopStart(3dm),
          etc.) or via the newer afSetLoopStartFrame(3dm) and related
          routines.  In the former case, both the loops and the markers will
          be written out to the header; in the latter case, only the loops
          will be written out (unless other markers have been created).

     Miscellaneous Chunks:

               AF_MISC_NAME        name string

               AF_MISC_COMMENT     comment string

SEE ALSO
     afInitFileFormat(3dm), afGetFileFormat(3dm), afIntro(3dm),
     afSetLoopStart(3dm), afSetLoopEnd(3dm)