public sealed class SynthesisInput : IMessage<SynthesisInput>, IEquatable<SynthesisInput>, IDeepCloneable<SynthesisInput>, IBufferMessage, IMessage
Contains text input to be synthesized. Either text or ssml must be
supplied. Supplying both or neither returns
[google.rpc.Code.INVALID_ARGUMENT][]. The input size is limited to 5000
characters.
The SSML document to be synthesized. The SSML document must be valid
and well-formed. Otherwise the RPC will fail and return
[google.rpc.Code.INVALID_ARGUMENT][]. For more information, see
SSML.
[[["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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-07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 of the \u003ccode\u003eGoogle.Cloud.TextToSpeech.V1\u003c/code\u003e library is 3.10.0, and multiple previous versions, ranging from 2.2.0 to 3.9.0, are also documented.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eSynthesisInput\u003c/code\u003e is a class that contains the text to be converted to speech, and it requires either the \u003ccode\u003etext\u003c/code\u003e property or the \u003ccode\u003essml\u003c/code\u003e property to be populated, but not both, and the input is limited to 5000 characters.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eSynthesisInput\u003c/code\u003e class inherits from \u003ccode\u003eObject\u003c/code\u003e and implements several interfaces, including \u003ccode\u003eIMessage\u003c/code\u003e, \u003ccode\u003eIEquatable\u003c/code\u003e, \u003ccode\u003eIDeepCloneable\u003c/code\u003e, and \u003ccode\u003eIBufferMessage\u003c/code\u003e, within the \u003ccode\u003eGoogle.Protobuf\u003c/code\u003e namespace.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eSynthesisInput\u003c/code\u003e has a \u003ccode\u003eInputSourceCase\u003c/code\u003e property, and two other important properties which are \u003ccode\u003eSsml\u003c/code\u003e and \u003ccode\u003eText\u003c/code\u003e to be synthesized which are of type string.\u003c/p\u003e\n"],["\u003cp\u003eThe class can be constructed either empty, or by copying an existing \u003ccode\u003eSynthesisInput\u003c/code\u003e object via its constructors.\u003c/p\u003e\n"]]],[],null,[]]
