8-bit samples that compand 13-bit audio samples using G.711 PCMU/a-law.
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 audio at 64kbps.
Mulaw
8-bit samples that compand 14-bit audio samples using G.711 PCMU/mu-law.
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.
[[["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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-07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."],[[["The `OutputAudioEncoding` enum in the Google Cloud Dialogflow v2beta1 API defines the format of audio output in Text-To-Speech."],["The latest version of this enum is `1.0.0-beta23`, with `1.0.0-beta22` also available, and both are part of the `Google.Cloud.Dialogflow.V2Beta1` namespace."],["Available audio encoding options include `Alaw`, `Linear16`, `Mp3`, `Mp364Kbps`, `Mulaw`, `OggOpus`, and `Unspecified`, each with specific characteristics like bitrate and compression."],["The `Linear16` option returns uncompressed audio with a WAV header, while `OggOpus` offers high-quality encoding suitable for Android and modern browsers."]]],[]]
