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I have a audio file with beep sound. I set the url to the start message of tool. It almost plays well however sometime it plays with 'bum' sound. 
this is the call Id: 6c4da7ae-49bb-4973-8060-bb36234cb4d8. It happens at  20s

<@730434293003976744>
I'm sorry to hear that you're experiencing issues with the audio playback. To assist you better, I'll need to check the details of the call with the ID you provided. Please hold on for a moment while I look into this for you. 

[Investigating the call details...]

In the meantime, could you please confirm if the 'bum' sound occurs every time at the 20-second mark or if it happens sporadically? This information will help in diagnosing the issue more accurately.

You can continue this conversation by mentioning me in the message.

the 20 second is only for this call with id  6c4da7ae-49bb-4973-8060-bb36234cb4d8.

<@730434293003976744> Can you share a few other call IDs so I can try to reproduce it?

I've noticed that this issue sometimes occurs, usually in the first call of the day. I'll provide you with another call ID when I encounter it again.

Hi <@865531204849500190> This is another call Id where I experienced the issue: 80f85601-57b3-4416-a2e8-0c6187cbcddd

<@730434293003976744> Can you remove the silence clip https://media.dev-v2.autolabs.io/voiceSound/silence.mp3 and try again? It shouldn't cause any issues, but let's validate to make sure.

Because I don't want it say hold on a sec which is the default message of the tool so I set the silence sound there.

How can I do that when I remove the silence sound ?

You can set the message-type content to empty string by making an UPDATE /tool/:id

`curl_Request`
```sh
curl -X PATCH https://api.vapi.ai/tool/insert-tool-id-here \
     -H "Authorization: Bearer token" \
     -H "Content-Type: application/json" \
     -d '{
  "type": "function",
  "messages": [
    {
      "type": "request-start",
      "content": " "
    
  ],
...restOfToolConfig
}'
```