This workflow follows the Execute Workflow Trigger → OpenAI recipe pattern — see all workflows that pair these two integrations.
The workflow JSON
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{
"name": "Transcription Service",
"nodes": [
{
"parameters": {
"workflowInputs": {
"values": [
{
"name": "fileId"
},
{
"name": "chatId"
}
]
}
},
"type": "n8n-nodes-base.executeWorkflowTrigger",
"typeVersion": 1.1,
"position": [
-200,
300
],
"id": "workflow-trigger",
"name": "When Executed by Another Workflow"
},
{
"parameters": {
"jsCode": "// Process input parameters\nconst fileId = $json.fileId || '';\nconst chatId = $json.chatId;\n\n// Validate file ID\nconst isValidFileId = fileId && fileId.length > 0;\n\nreturn {\n json: {\n file_id: fileId,\n chat_id: chatId,\n is_valid_file_id: isValidFileId\n }\n};"
},
"type": "n8n-nodes-base.code",
"typeVersion": 2,
"position": [
0,
300
],
"id": "input-processor",
"name": "Input Processor"
},
{
"parameters": {
"conditions": {
"options": {
"caseSensitive": false,
"leftValue": "",
"typeValidation": "strict"
},
"conditions": [
{
"leftValue": "={{ $json.is_valid_file_id }}",
"rightValue": true,
"operator": {
"type": "boolean",
"operation": "equal"
}
}
],
"combinator": "and"
},
"options": {}
},
"type": "n8n-nodes-base.if",
"typeVersion": 2,
"position": [
200,
300
],
"id": "file-validator",
"name": "File ID Validator"
},
{
"parameters": {
"chatId": "={{ $json.chat_id }}",
"text": "\ud83d\udeab Invalid voice file. Please send a valid voice message.",
"additionalFields": {
"appendAttribution": false
}
},
"type": "n8n-nodes-base.telegram",
"typeVersion": 1.2,
"position": [
200,
500
],
"id": "invalid-file-response",
"name": "Invalid File Response"
},
{
"parameters": {
"chatId": "={{ $json.chat_id }}",
"text": "\ud83c\udfa4 Transcribing your voice message...\n\n\u23f3 This will take a few seconds...",
"additionalFields": {
"appendAttribution": false
}
},
"type": "n8n-nodes-base.telegram",
"typeVersion": 1.2,
"position": [
400,
200
],
"id": "transcription-notification",
"name": "Transcription Notification"
},
{
"parameters": {
"resource": "file",
"fileId": "={{ $json.file_id }}"
},
"type": "n8n-nodes-base.telegram",
"typeVersion": 1.2,
"position": [
600,
200
],
"id": "download-voice-file",
"name": "Download Voice File"
},
{
"parameters": {
"resource": "audio",
"operation": "transcribe",
"options": {
"language": "auto",
"temperature": 0,
"response_format": "text"
}
},
"type": "@n8n/n8n-nodes-langchain.openAi",
"typeVersion": 1.8,
"position": [
800,
200
],
"id": "transcribe-audio",
"name": "Transcribe Audio"
},
{
"parameters": {
"jsCode": "// Process transcription result\nconst transcriptionText = $json.text || '';\nconst originalInput = $('Input Processor').item.json;\n\n// Clean up the transcription\nconst cleanedText = transcriptionText.trim();\n\nif (cleanedText && cleanedText.length > 0) {\n return {\n json: {\n success: true,\n chat_id: originalInput.chat_id,\n file_id: originalInput.file_id,\n transcription: cleanedText,\n word_count: cleanedText.split(' ').length,\n message: `\u2705 Voice transcribed successfully!\\n\\n\ud83d\udcdd Transcript: \"${cleanedText}\"`\n }\n };\n} else {\n return {\n json: {\n success: false,\n chat_id: originalInput.chat_id,\n file_id: originalInput.file_id,\n error: 'Failed to transcribe the voice message',\n message: '\u274c Could not transcribe the voice message. Please try again or speak more clearly.'\n }\n };\n}"
},
"type": "n8n-nodes-base.code",
"typeVersion": 2,
"position": [
1000,
200
],
"id": "transcription-processor",
"name": "Transcription Processor"
},
{
"parameters": {
"conditions": {
"options": {
"caseSensitive": false,
"leftValue": "",
"typeValidation": "strict"
},
"conditions": [
{
"leftValue": "={{ $json.success }}",
"rightValue": true,
"operator": {
"type": "boolean",
"operation": "equal"
}
}
],
"combinator": "and"
},
"options": {}
},
"type": "n8n-nodes-base.if",
"typeVersion": 2,
"position": [
1200,
200
],
"id": "success-check",
"name": "Success Check"
},
{
"parameters": {
"chatId": "={{ $json.chat_id }}",
"text": "={{ $json.message }}",
"additionalFields": {
"appendAttribution": false
}
},
"type": "n8n-nodes-base.telegram",
"typeVersion": 1.2,
"position": [
1400,
100
],
"id": "success-notification",
"name": "Success Notification"
},
{
"parameters": {
"chatId": "={{ $json.chat_id }}",
"text": "={{ $json.message }}",
"additionalFields": {
"appendAttribution": false
}
},
"type": "n8n-nodes-base.telegram",
"typeVersion": 1.2,
"position": [
1400,
300
],
"id": "error-notification",
"name": "Error Notification"
},
{
"parameters": {
"content": "# Input Validation\n\n\ud83d\udccb Validate voice file parameters",
"height": 260,
"width": 440,
"color": 5
},
"type": "n8n-nodes-base.stickyNote",
"typeVersion": 1,
"position": [
-220,
180
],
"id": "input-validation-label",
"name": "#InputValidation"
},
{
"parameters": {
"content": "# Voice Processing\n\n\ud83c\udfa4 Download and transcribe voice files",
"height": 260,
"width": 440,
"color": 3
},
"type": "n8n-nodes-base.stickyNote",
"typeVersion": 1,
"position": [
380,
80
],
"id": "voice-processing-label",
"name": "#VoiceProcessing"
},
{
"parameters": {
"content": "# Result Processing\n\n\ud83d\udcca Process transcription results",
"height": 260,
"width": 440,
"color": 7
},
"type": "n8n-nodes-base.stickyNote",
"typeVersion": 1,
"position": [
1180,
80
],
"id": "result-processing-label",
"name": "#ResultProcessing"
}
],
"connections": {
"When Executed by Another Workflow": {
"main": [
[
{
"node": "Input Processor",
"type": "main",
"index": 0
}
]
]
},
"Input Processor": {
"main": [
[
{
"node": "File ID Validator",
"type": "main",
"index": 0
}
]
]
},
"File ID Validator": {
"main": [
[
{
"node": "Transcription Notification",
"type": "main",
"index": 0
}
],
[
{
"node": "Invalid File Response",
"type": "main",
"index": 0
}
]
]
},
"Transcription Notification": {
"main": [
[
{
"node": "Download Voice File",
"type": "main",
"index": 0
}
]
]
},
"Download Voice File": {
"main": [
[
{
"node": "Transcribe Audio",
"type": "main",
"index": 0
}
]
]
},
"Transcribe Audio": {
"main": [
[
{
"node": "Transcription Processor",
"type": "main",
"index": 0
}
]
]
},
"Transcription Processor": {
"main": [
[
{
"node": "Success Check",
"type": "main",
"index": 0
}
]
]
},
"Success Check": {
"main": [
[
{
"node": "Success Notification",
"type": "main",
"index": 0
}
],
[
{
"node": "Error Notification",
"type": "main",
"index": 0
}
]
]
}
},
"active": false,
"settings": {
"executionOrder": "v1"
},
"versionId": "1.0.0",
"meta": {
"templateCredsSetupCompleted": false
},
"id": "TranscriptionService",
"tags": [
"transcription",
"voice-processing",
"openai-whisper",
"module"
]
}
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About this workflow
Transcription Service. Uses executeWorkflowTrigger, telegram, openAi. Event-driven trigger; 14 nodes.
Source: https://github.com/0xabstracted/socialmedia-audio-extractor/blob/main/n8n/workflows/03_Transcription_Service.json — original creator credit. Request a take-down →
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