How should I use speech2text in Chatflow?

[SeanWang918]

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In the Agent, I can use the speech2text tool normally to receive the user's voice output, and then receive the result of voice-to-text conversion on the dify client. As shown in the figure below:

However, in Chatflow, the "speech2text" function requires an input variable, and this variable should be the audio file uploaded by the client.

Does the built-in client of Dify not automatically invoke the audio-to-text interface in the chatflow project? Wouldn't it do the same as the Agent's client and automatically invoke it?