Speaker Diarization Support for Stereo Audio Files (Left/Right Channels) – Configuration Guidance and Sample Code Needed

[sthorat789]

Dear Deepgram Community,
I hope this post finds you well. We're currently integrating Deepgram's speech-to-text API into our application and have encountered an issue with speaker diarization when processing stereo audio files. Specifically, we're working with audio inputs that utilize distinct left and right channels to represent different speakers (e.g., one speaker per channel).

Observed Behavior
When we enable speaker diarization via the diarize=true parameter in our API requests, Deepgram consistently assigns all utterances to speaker 0 across both channels, regardless of the audio separation. This results in no differentiation between the left and right channel speakers, which defeats the purpose of diarization in our multi-channel setup.

Questions

1. Does Deepgram natively support speaker diarization for stereo audio files, treating left and right channels as separate speaker sources? If so, could you please clarify any prerequisites (e.g., audio format, sample rate, or channel mapping requirements)?
2. What specific configuration options are recommended to enable proper channel-based diarization?

For instance:

• Are there additional parameters like multichannel=true, custom diarization_config, or endpoint-specific flags (e.g., for the Whisper or Nova models) that we should include?
• Should the audio be pre-processed (e.g., via FFmpeg to split channels) before submission, or can Deepgram handle this natively?

Request for Assistance
To help us troubleshoot and implement this effectively, could you provide:

• A sample Python code snippet demonstrating a successful API call for stereo diarization? Ideally, this would include:
• Audio upload or buffer handling for a stereo file.
• Relevant configuration parameters.
• Parsing of the response to extract channel-specific speaker labels.

[deepgram-community[bot]]

Thanks for asking your question. Please be sure to reply with as much detail as possible so the community can assist you efficiently.
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[deepgram-community[bot]]

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[deepgram-community[bot]]

It looks like we're missing some important information to help debug your issue. Would you mind providing us with the following details in a reply?

• A request ID that triggered your error or issue.

[sthorat789]

We are running over websockets so we dont have Request ID
config we using -

• DEEPGRAM_API_KEY='xxxxxx'
• DEEPGRAM_SPEECH_DIARIZE =True
• DEEPGRAM_SPEECH_DIARIZE_VERSION = latest
• DEEPGRAM_CHANNELS = 2

We sending stereo stream, Deepgram successfully identifies channel 0 and 1 but always returns speaker 0

Logs:
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