Item.input_audio_transcription.logprobs induces white noise

API
, ,
1

I use the following Realtime API session settings:

     const sessionUpdate = {
        type: "session.update",
        session: {          
          turn_detection: {
            type: "server_vad",
            threshold: 0.3,
            prefix_padding_ms: 300,
            silence_duration_ms: 500,
            create_response: true, 
            interrupt_response: true, 
          },

          input_audio_format: "g711_ulaw",
          output_audio_format: "g711_ulaw",
          voice: voiceName,
          instructions: SYSTEM_MESSAGE, 
          modalities: ["text", "audio"],
          temperature: 0.6,
          speed: 1.05,

          input_audio_transcription: {
            model: "gpt-4o-transcribe", 
            prompt: transcriptionPrompt,
            language: "fr",
          },
          tools: sessionTools,
        },

        // include: ["item.input_audio_transcription.logprobs"], // PROBLEM !!! WHITE NOISE WHEN UNCOMMENTED !!!!
      };

I want to use logprobs as mentioned here in the doc.

So I just added:

"include: ["item.input_audio_transcription.logprobs"],"

When I make a call, I immediately get a white noise.

How to solve this issue ?

Thanks.