Can anyone help with where and how to host audio mp3 url for holdaudio for twillio phone number during warm transfer, I hand only sucess with the cowbeell mp3 that vapi offers in documentations but with whyp.it/dropbox/drive I had no access. Thank you for any reply!

Hi Herbynator, To host an audio file for the

holdAudioUrl

in a

warm-transfer-experimental

mode, you need to ensure that the URL is publicly accessible. Here are some steps you can follow: 1. **Select a Hosting Service**: Use a reliable hosting provider like AWS S3, Google Cloud Storage, or a similar service that offers public URL access to files. 2. **Upload Your File**: Upload your MP3 file to the service. Ensure that it's set to public access so that your phone system can retrieve it. 3. **Get the Public URL**: After uploading, retrieve the public URL for your audio file. This URL will be used as the

holdAudioUrl

. 4. **Verify Access**: Before using it in your configuration, test the URL in a web browser to confirm it's accessible without requiring login or permissions. Using an accessible URL ensures your hold music will stream correctly during call transfers. Let me know if you have any other questions. If this doesn’t resolve the issue, please let us know and we’ll be happy to step in and assist further.

Hi Aniah, I have got a problem with the transfer assistant, it takes from 5 seconds to 35 unitl the hold audio starts playing or the phone bz bz jumps in, I see the tool is triggered with the message: I am forwarding your call..... but it takes ages for the music or the bz bz so I can see the hold audio is not the problem - even compressed and short, REALLY NEED YOUR HELP, thank you

i can help u

Hi Herbynator, The delay you're experiencing between the transfer message and hold music could be related to several factors described in the documentation [1](https://docs.vapi.ai/calls/assistant-based-warm-transfer): 1. Configuration Check:

"transferPlan": {  "mode": "warm-transfer-experimental",  "holdAudioUrl": "https://assets.example.com/hold-music.mp3",  "transferAssistant": {    "firstMessage": "...",    "maxDurationSeconds": 120  }}

2. Best Practices: - Keep

firstMessage

brief and clear - Set appropriate

maxDurationSeconds

(60-120 seconds recommended) - Configure proper system prompts for handling transitions 3. Known Limitations: - Only works with Twilio phone numbers - Requires

warm-transfer-experimental

mode - Built-in tools have predefined behavior that cannot be modified Given your specific issue with the delay before hold music, you should: 1. Verify your

transferPlan

configuration 2. Check that your hold audio file is properly hosted and accessible 3. Consider using the fallback plan configuration to handle delays