AssemblyAI transcription and LeMUR analysis
AssemblyAI is the audio-AI platform — transcription with speaker diarization, sentiment analysis, content moderation, plus LeMUR (the LLM that operates on transcripts: summarise, ask questions, extract structured data from a transcript). Tiny Command exposes three actions, no triggers: Transcribe Audio (submit audio for transcription — returns a transcript ID immediately; AssemblyAI processes async), Get Transcript (poll for status; when complete, returns text + word-level timestamps + speakers + optional sentiment per utterance), LeMUR Task (run an LLM task against a completed transcript — summarise, question-answer, extract structured data into a schema). The connection uses an AssemblyAI API key from the dashboard. Transcription latency is roughly 25% of audio duration (a 60-minute call transcribes in ~15 minutes) on the Best tier; faster on the Nano tier with slightly lower accuracy. The LeMUR layer is the differentiator — instead of post-processing transcripts with your own LLM, LeMUR does it natively with context-window optimisations.
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Every action accepts dynamic inputs from upstream nodes, whether that's an AI output, a form field, or a search result.
| Action | What it does | Open action |
|---|---|---|
| Get Transcript | Returns the transcript by ID with the full text, word-level timestamps, speaker labels (if diarization was on), sentiment per utterance (if enabled), and the AI-generated summary. Poll until status=completed or pair with the transcript-ready webhook. | |
| LeMUR Task on Transcript | Runs an LLM task (summarise, Q&A, extract structured data) against one or more completed transcripts. Saves the chain of "fetch transcript → LLM call" by bundling both server-side. Useful for "summarise this call, extract action items as JSON" post-call workflows. | |
| Transcribe Audio | Submits an audio URL for transcription with options for speaker diarization, language detection, sentiment analysis, PII redaction, custom vocabulary. Returns the transcript ID; processing takes ~25% of audio duration on the Best tier. |
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Connect AssemblyAI once and every workflow on your account can use its triggers and actions. You don't have to re-auth per workflow.
Every AssemblyAI field shows up in the visual picker for downstream nodes. The raw payload is there for power users, optional for everyone else.
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