Electronic Arts 1SNx

• Company: Electronic Arts
• Samples: TBD.

1SNx is an audio stream format used in various games published by companies under the Electronic Arts umbrella.

Chunk Types

See Electronic Arts Formats for file format description.

1SNh

The header chunk contains codec initialisation parameters. The byte-order varies for different platforms.

offset

  0   byte     Tag, 'EACS'
  4   int32    Sample rate (hz)
  8   byte     number of bits (1=8-bit, 2=16-bit)
  9   byte     number of channels
  10  byte     compression type
                   0 = Signed PCM (8-bit or 16-bit Little Endian)
                   1 = 8-bit mu-Law
                   2 = EACS ADPCM (IMA ADPCM Variant)
  11  byte     file type
  12  int32    number of samples
  16  int32    loop start
  20  int32    data start
  24  int32    unknown
  28  int32    unknown

The remainder of the header chunk contains codec-specific data.

1SNd

Contains the codec-specific data.

1SNl

Loop.

1SNe

Indicates end of the stream. Contains no data.