Obsidian Whisper: "Error parsing audio: Request failed with status code 400"


I started using the Whisper plugin a few days ago. I am amazed how well it transcribes my speech into text and embeds it directly into a markdown link.

Unfortunately I get this error, when I want to upload an already recorded file (in m4a-format and size of 1MB). I still have 10$ left in my OpenAI credit balance, so lack of credit cannot be the reason.

Do you have an idea, what the problem could be?

Thanks in advance
kind regards,


when I converted the file from m4a to webm the transcription worked - now error was thrown…