The addhdr command adds a voice or code header to a speech file.
Synopsis
addhdr [voice | pcm64 | adpcm32 | adpcm16 | celp16][tag]
Description
The addhdr command is a filter that adds a header to a speech file. Two mutually exclusive types of headers are supported: voice and code. A voice header identifies a file as being editable, and includes an optional identifying tag. A code header (which can be PCM64, ADPCM32, ADPCM16, SBC24, SBC16, or CELP16) identifies the way in which the file is encoded. Code headers are required on any file that is played on the voice system.
Before converting between voice and code headers, you must strip off any existing headers.