# init(inputSequence:modules:options:analysisContext:volatileRangeChangedHandler:) Creates an analyzer and begins analysis. ``` convenience init(inputSequence: InputSequence, modules: [any SpeechModule], options: SpeechAnalyzer.Options? = nil, analysisContext: AnalysisContext = .init(), volatileRangeChangedHandler: sending ((CMTimeRange, Bool, Bool) -> Void)? = nil) where InputSequence : Sendable, InputSequence : AsyncSequence, InputSequence.Element == AnalyzerInput ``` ## Parameters `inputSequence` An asynchronous sequence of audio inputs to analyze. Analysis will begin when the first audio input is added to the sequence. `modules` An initial list of modules that will analyze the audio. `options` A structure specifying analysis options. `analysisContext` An object containing contextual information to improve or inform the analysis. `volatileRangeChangedHandler` A closure called to report the analysis’ progress. The closure takes the following parameters: - range: The current volatile range. - changedStart: If `true`, the volatile range contains an updated start time. This indicates that prior results have been finalized. - changedEnd: If `true`, the volatile range contains an update end time. This indicates that analysis of that time has started. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)