> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.jambonz.org/changelog/2024/4/20/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.jambonz.org/_mcp/server.

#### 0.9.0

Major release

#### New Features

* Add support for google v2 STT api
* Add support for additional TTS vendors: [PlayHT](https://play.ht/), [RimeLabs](https://rime.ai/), and [Deepgram](https://deepgram.com/product/text-to-speech)
* Add support for streaming TTS (reduces latency) for Deepgram, ElevenLabs, Microsoft, PlayHT, RimeLabs, and Whisper
* Add support for [bidirectional audio](/docs/supporting-articles/bidirectional-audio) in [listen](/docs/webhooks/listen) verb
* Add new verb: [dub](/docs/webhooks/dub/) to insert additional audio tracks into the conversation; see [here](/docs/supporting-articles/using-dub-tracks/) for example usage.
* Add `boostAudioSignal` to [config](/docs/webhooks/config) verb allowing the volume of a conversation to be increased or lowered.
* Add support for "filler" audio to the [gather](/docs/webhooks/config) verb allowing brief audio to be played to a caller while the user application is processing a user utterance or dtmf collection, this can be useful in scenarios where an AI bot is expected to take a lengthy time to process a request
* Add [coach mode](/docs/supporting-articles/conferencing-coach-mode) to conferencing, allowing for instance a manager to "whisper" to an agent on a 3-way conference with a customer
* Add support for sending outbound OPTIONS pings to configured SIP trunks
* If Deepgram endpointing is enabled, default utterance\_end\_ms to 1000 if none specified by the application (per Deepgram recommendation)
* various improvements and enhancements to [node-client-ws](https://github.com/jambonz/node-client-ws)

#### Bug fixes

* various fixes for Deepgram STT
* [714](https://github.com/jambonz/jambonz-feature-server/issues/714) bargein "sticky" only works twice
* [710](https://github.com/jambonz/jambonz-feature-server/issues/710) fix for actionHookDelay action
* [671](https://github.com/jambonz/jambonz-feature-server/issues/671) handling of siprec invite failure
* [666](https://github.com/jambonz/jambonz-feature-server/issues/666) transcribe on dial verb does not transcribe B leg by default
* fix for precaching of TTS
* check if sip gateway is in blacklist before sending outbound call

#### SQL changes

```
ALTER TABLE sip_gateways ADD COLUMN send_options_ping BOOLEAN NOT NULL DEFAULT 0
ALTER TABLE applications MODIFY COLUMN speech_synthesis_voice VARCHAR(256)
ALTER TABLE applications MODIFY COLUMN fallback_speech_synthesis_voice VARCHAR(256)
```

#### Availability

* Available now on jambonz.cloud
* devops scripts (packer, cloudformation, helm) available now for subscription customers

**Questions?** Contact us at [[support@jambonz.org](mailto:support@jambonz.org)](mailto:support@jambonz.org)