### Answer I don't have specific documentation about the "Enable bridging audio cue (1.5s ringtone) " setting in the available sources. What I can tell you is that warm transfers include an On-hold music option, which is the audio played to the caller while they are on hold, and the default is a standard ringtone. [(1) ]() The on-hold music options include: Ringtone, Relaxing Sound, Uplifting Beats, and No Music. [(2) ]() The "bridging audio cue" setting you're asking about may be a newer feature or a specific UI element not covered in my current sources. I'd recommend checking the latest documentation or reaching out to support for clarification. Check out these potentially useful sources: - [Transfer call]() - [Warm Transfer vs Cold Transfer]() - [Platform Changelogs]() Would you like me to provide a general answer based on what this setting likely does?

​ To learn more, see the sources I considered: [[1] Transfer call](https://docs.retellai.com/build/single-multi-prompt/transfer-call) [[2] Warm Transfer vs Cold Transfer - The AI Advantage in Call Centers | Retell AI](https://www.retellai.com/blog/effortless-handoffs-with-retell-ais-warm-transfer-feature) ​

Feel free to tag @AI Evy with additional questions. I also appreciate feedback, it helps me improve.