Waveform Archiver

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File Format
Name Waveform Archiver
Ontology
Extension(s) .wa
Released 1994 (beta), 1997 (v1.0)

Waveform Archiver (WA, informally called WavArc) is a specialized archive utility for DOS, and its associated file format. It was developed by Dennis Lee.

It only compresses a certain class of WAV file. Other files types are supported but not compressed.

Contents

File structure

A WA file seems to be structured as a sequence of "member files", each of which begins with these fields:

(1 byte) Length of filename field
(variable size) Filename
(1 byte) Unknown, observed to be 0x00
(4 bytes) A FourCC-like identifier for the compression level.
  The following IDs are used:
    0CPY
    1DIF
    2SLP
    3NLP
    4ALP
    5ELP

Identification

WA files have no signature. Identification could be done by checking for one of the compression IDs at offset {2 + {the value of the byte at offset 0}}.

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