{"product_id":"n8n-interview-coach-workflow-whisper-gpt-4-1-tts","title":"n8n Interview Coach Workflow: Whisper + GPT-4.1 TTS","description":"\u003ch3\u003eTurn every interview question into a voice-first coaching session\u003c\/h3\u003e\n\u003cp\u003eThis \u003cstrong\u003en8n Interview Coach Workflow\u003c\/strong\u003e receives a candidate’s audio via webhook, transcribes it with \u003cstrong\u003eOpenAI Whisper\u003c\/strong\u003e, analyzes delivery metrics, and then responds with a \u003cstrong\u003espoken coaching feedback\u003c\/strong\u003e using \u003cstrong\u003eOpenAI GPT-4.1 TTS\u003c\/strong\u003e—including a next interview question and structured scoring.\u003c\/p\u003e\n\n\u003ch3\u003eWhat this workflow does\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWebhook-based intake:\u003c\/strong\u003e Handles a \u003ccode\u003ePOST\u003c\/code\u003e webhook request with \u003ccode\u003esessionId\u003c\/code\u003e, \u003ccode\u003erole\u003c\/code\u003e (optional), \u003ccode\u003eturnNumber\u003c\/code\u003e, and an audio recording from the candidate.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpeech-to-Text (Whisper):\u003c\/strong\u003e Sends the audio to OpenAI Speech-to-Text (Whisper) to generate a transcript.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDelivery metrics analysis:\u003c\/strong\u003e Computes coaching-relevant signals such as filler-word usage, words per minute, pace assessment, short-answer flags, and whether the session reached the final turn.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSession-aware coaching:\u003c\/strong\u003e Uses an OpenAI chat agent with \u003cstrong\u003eWindow Buffer Memory\u003c\/strong\u003e keyed by \u003ccode\u003esessionId\u003c\/code\u003e to produce structured JSON feedback, encouragement, a score, and a follow-up question (or a wrap-up on the final turn).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eText-to-Speech response:\u003c\/strong\u003e Converts the coaching output and next question into audio via OpenAI Text-to-Speech (GPT-4.1 TTS).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDelivery confirmation:\u003c\/strong\u003e Waits for a delivery-confirmation callback; then returns the transcript, coaching outputs, score, next question, and generated audio—or sends a retry message if not confirmed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eUse cases\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMock interview coaching\u003c\/strong\u003e for job candidates using voice recordings.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInterview practice for SaaS recruiters\u003c\/strong\u003e who want consistent, session-based feedback and scoring.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFounder-led hiring enablement\u003c\/strong\u003e where automation engineers need an end-to-end n8n voice loop.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical details\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eOpenAI integration for \u003cstrong\u003eWhisper\u003c\/strong\u003e transcription and \u003cstrong\u003eText-to-Speech (GPT-4.1 TTS)\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003cli\u003en8n nodes\/workflow building blocks mentioned: \u003cstrong\u003ewebhook\u003c\/strong\u003e, \u003cstrong\u003ewait\u003c\/strong\u003e, \u003cstrong\u003eset\u003c\/strong\u003e, \u003cstrong\u003ecode\u003c\/strong\u003e, \u003cstrong\u003eif\u003c\/strong\u003e, plus workflow notes (\u003cstrong\u003esticky note\u003c\/strong\u003e).\u003c\/li\u003e\n  \u003cli\u003eSession state handled via \u003cstrong\u003eWindow Buffer Memory\u003c\/strong\u003e keyed by \u003ccode\u003esessionId\u003c\/code\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eBest for n8n users, automation engineers, and SaaS operators\u003c\/strong\u003e who want a production-style, webhook-driven voice interview coach with measurable delivery coaching.\u003c\/p\u003e","brand":"N8N Commerce","offers":[{"title":"Default Title","offer_id":45830458015923,"sku":"N8N-18212","price":63.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/6279\/6723\/files\/bhUPYZsOgljq53iF76AK1_skA3P4oe.png?v=1786698990","url":"https:\/\/buyflowscripts.com\/products\/n8n-interview-coach-workflow-whisper-gpt-4-1-tts","provider":"N8N Commerce","version":"1.0","type":"link"}