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.
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.
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"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-07 UTC."],[[["\u003cp\u003eThe latest version available for the Google Cloud Text-to-Speech v1 API is 3.10.0, with multiple prior versions listed, including 3.9.0, 3.8.0, and down to 2.2.0.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eAudioEncoding\u003c/code\u003e enum within the API defines the format of the output audio, allowing options like \u003ccode\u003eAlaw\u003c/code\u003e, \u003ccode\u003eLinear16\u003c/code\u003e, \u003ccode\u003eMp3\u003c/code\u003e, \u003ccode\u003eMulaw\u003c/code\u003e, \u003ccode\u003eOggOpus\u003c/code\u003e, and \u003ccode\u003eUnspecified\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eOggOpus\u003c/code\u003e encoding provides high-quality audio in an ogg container, compatible with browsers and Android, and is considered higher quality than MP3.\u003c/p\u003e\n"],["\u003cp\u003eEncodings like \u003ccode\u003eAlaw\u003c/code\u003e, \u003ccode\u003eLinear16\u003c/code\u003e, and \u003ccode\u003eMulaw\u003c/code\u003e include a WAV header in the returned audio content.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eUnspecified\u003c/code\u003e field is not a valid option and will result in a \u003ccode\u003egoogle.rpc.Code.INVALID_ARGUMENT\u003c/code\u003e error.\u003c/p\u003e\n"]]],[],null,[]]
