Wrong audio format override - SIP

[danigian]

Describe the bug

In case of SIP integration, input_audio_format and output_audio_format should not be overridden with the defaults specified here:

openai-agents-python/src/agents/realtime/openai_realtime.py

Lines 145 to 146 in 9bcf081

	"input_audio_format": "pcm16",
	"output_audio_format": "pcm16",

Debug information

• Agents SDK version: v0.5.1
• Python version 3.13

Repro steps

1. Initiate a SIP call from a client that is using g711-ulaw or g711-alaw
2. Realize that audio is going to be distorted because of the defaults

Expected behavior

When call_id is present (indicating a SIP session), the client should not override the audio format imposed by SIP, when doing the connect on the websocket.

[seratch]

Thank you so much for reporting this issue. I've sent a pull request #2105 aiming to resolve this, and we'll include changes in the next patch release.