Metadata pertaining to this request.
Optional
AudioOptional
Content Specifies the type audio stream. This should reflect the
OutputFormat
parameter in your request.
If you request mp3
as the
OutputFormat
, the ContentType
returned is
audio/mpeg.
If you request ogg_vorbis
as the
OutputFormat
, the ContentType
returned is
audio/ogg.
If you request pcm
as the
OutputFormat
, the ContentType
returned is
audio/pcm in a signed 16-bit, 1 channel (mono), little-endian format.
If you request json
as the
OutputFormat
, the ContentType
returned is
application/x-json-stream.
Optional
RequestNumber of characters synthesized.
The output of SynthesizeSpeechCommand.