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Update History

This page lists the major update history for AmiVoice API and this manual. Minor updates and fixes are made regularly in addition to those listed here.

Major Functional Update History for AmiVoice API​

Multiple new features related to speech recognition processing have been released, and maxDecodingTime, maxResponseTime, maxDecodingRate, targetResponseTime, targetDecodingRate, recognitionTimeout, and noInputTimeout have been added as request parameters to enable these features.

Additionally, the Retrieving Profile List has been released for the user word registration API.

2025-10-31: "Usage Aggregation Tag" now supports Asynchronous HTTP interface v2​

Usage Aggregation Tag now supports Asynchronous HTTP interface v2, making it available for all interfaces.

2025-10-02: Language labels added to recognition results of multilingual End to End engine​

Language labels indicating the language of words recognized by the engine have been added to the word-level recognition results of the multilingual End to End engine. For details, please see results[0].tokens[].language in Word-level Results.

2025-09-30: Release of new feature "Usage Aggregation Tag"​

Usage Aggregation Tag, which enables obtaining usage by attribute when sharing the same account, has been released. However, this feature is not yet supported for Asynchronous HTTP interface v2.

2025-08-13: Support for Opus audio data stored in WebM container​

AmiVoice API now supports Opus audio data stored in WebM container. For details, please see Audio formats with headers.

2025-06-23: Word Registration API now supports 8k audio​

Word Registration API can now handle operations for 8k audio profiles. For details, please see adf in the "Request Parameters" of each operation description in User Word Registration.

Major Update History for the Manual​

2025-01-08: Added instructions for setting email addresses for failure notifications​

We have added documentation explaining how to set up email addresses for receiving notifications about AmiVoice API failures. Along with this, we have partially changed the structure of the manual.

Location: Setting Up Failure Notification Recipients

Updated sections: "Speaker diarization parameters" in segmenterProperties, Adjusting speaker detection sensitivity in speaker diarization

2025-12-02: Addition of Statuspage information​

Information about Statuspage, which provides information on AmiVoice API outages and delays, has been added.

Added section: Outage and delay information

2025-10-01: Information on Rule Grammar published​

Information about grammar files used with the "音声入力_ルール" engine (-a-rule-input-private) available in AmiVoice API Private has been published.

Location: Rule Grammar

2025-08-13: Information on segmenterProperties published​

Information about parameters related to adjusting speech segment detection in speech recognition within the request parameter segmenterProperties has been published.

Location: "Speech segment detection parameters" in segmenterProperties