8-bit samples that compand 14-bit audio samples using G.711 PCMU/A-law.
Audio content returned as ALAW also contains a WAV header.
Linear16
Uncompressed 16-bit signed little-endian samples (Linear PCM).
Audio content returned as LINEAR16 also contains a WAV header.
Mp3
MP3 audio at 32kbps.
Mp364Kbps
MP3 at 64kbps.
Mulaw
8-bit samples that compand 14-bit audio samples using G.711 PCMU/mu-law.
Audio content returned as MULAW also contains a WAV header.
OggOpus
Opus encoded audio wrapped in an ogg container. The result will be a
file which can be played natively on Android, and in browsers (at least
Chrome and Firefox). The quality of the encoding is considerably higher
than MP3 while using approximately the same bitrate.
Pcm
Uncompressed 16-bit signed little-endian samples (Linear PCM).
Note that as opposed to LINEAR16, audio will not be wrapped in a WAV (or
any other) header.
Unspecified
Not specified. Will return result
[google.rpc.Code.INVALID_ARGUMENT][google.rpc.Code.INVALID_ARGUMENT].
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-07 UTC."],[[["\u003cp\u003eThe \u003ccode\u003eAudioEncoding\u003c/code\u003e enum in the Google Cloud Text-to-Speech v1beta1 API specifies the desired output audio format.\u003c/p\u003e\n"],["\u003cp\u003eAvailable encoding options include \u003ccode\u003eAlaw\u003c/code\u003e, \u003ccode\u003eLinear16\u003c/code\u003e, \u003ccode\u003eMp3\u003c/code\u003e, \u003ccode\u003eMp364Kbps\u003c/code\u003e, \u003ccode\u003eMulaw\u003c/code\u003e, \u003ccode\u003eOggOpus\u003c/code\u003e, \u003ccode\u003ePcm\u003c/code\u003e, and \u003ccode\u003eUnspecified\u003c/code\u003e, each with unique characteristics and header information.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eLinear16\u003c/code\u003e, \u003ccode\u003eAlaw\u003c/code\u003e, and \u003ccode\u003eMulaw\u003c/code\u003e will have a WAV header, while \u003ccode\u003ePcm\u003c/code\u003e will not have any header, and \u003ccode\u003eOggOpus\u003c/code\u003e will be wrapped in an Ogg container.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eUnspecified\u003c/code\u003e option is not a valid encoding, resulting in an \u003ccode\u003eINVALID_ARGUMENT\u003c/code\u003e error.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eOggOpus\u003c/code\u003e option offers high-quality audio encoding, comparable to MP3, while maintaining similar bitrates.\u003c/p\u003e\n"]]],[],null,[]]
