> ## Documentation Index > Fetch the complete documentation index at: https://docs.poix.io/llms.txt > Use this file to discover all available pages before exploring further. # Get audio files list > This endpoint retrieves a list of audio files for a specified YouTube video. ## OpenAPI ````yaml get /files/audio/{videoId} openapi: 3.1.0 info: version: 1.0.0 title: Poix API servers: - url: https://api.poix.io description: Production server security: [] paths: /files/audio/{videoId}: get: summary: Get audio files list description: >- This endpoint retrieves a list of audio files for a specified YouTube video. operationId: getAudioFilesList parameters: - schema: type: string minLength: 11 maxLength: 11 description: The YouTube video ID example: dQw4w9WgXcQ required: true name: videoId in: path responses: '200': description: Successful response content: application/json: schema: type: array items: type: object properties: itag: type: integer exclusiveMinimum: 0 description: The itag of the audio format url: type: string format: uri description: The URL of the audio file mimeType: type: string description: The MIME type of the audio file bitrate: type: integer exclusiveMinimum: 0 description: The bitrate of the audio in bits per second initRange: type: object properties: start: type: string description: The start byte of the initialization range end: type: string description: The end byte of the initialization range required: - start - end description: The initialization range for the audio file indexRange: type: object properties: start: type: string description: The start byte of the index range end: type: string description: The end byte of the index range required: - start - end description: The index range for the audio file lastModified: type: string description: The last modified timestamp of the audio file contentLength: type: string description: The content length of the audio file in bytes quality: type: string description: The quality label of the audio projectionType: type: string description: The projection type of the audio averageBitrate: type: integer exclusiveMinimum: 0 description: The average bitrate of the audio in bits per second audioQuality: type: string description: The audio quality label approxDurationMs: type: string description: The approximate duration of the audio in milliseconds audioSampleRate: type: string description: The audio sample rate audioChannels: type: integer exclusiveMinimum: 0 description: The number of audio channels parsedContentLength: type: string description: The parsed content length in a human-readable format lengthSeconds: type: string description: The length of the audio in seconds parsedLastModified: type: string description: The parsed last modified date in ISO 8601 format highReplication: type: boolean description: Indicates if the audio has high replication required: - itag - url - mimeType - bitrate - initRange - indexRange - lastModified - contentLength - quality - projectionType - averageBitrate - audioQuality - approxDurationMs - audioSampleRate - audioChannels - parsedContentLength - lengthSeconds - parsedLastModified description: List of available audio files example: - itag: 139 url: >- https://rr1---sn-8vq54voxpu-925e.googlevideo.com/videoplayback?expire=1727179901&ei=HVjyZoX0DraCi9oPuJLFyAI&ip=31.26.138.243&id=o-AGFdx643g1zp1pVHAn6l5PANXDz8Nvmg7DncE_45cMM6&itag=139&source=youtube&requiressl=yes&xpc=EgVo2aDSNQ%3D%3D&mh=7c&mm=31%2C29&mn=sn-8vq54voxpu-925e%2Csn-hpa7zns6&ms=au%2Crdu&mv=m&mvi=1&pl=21&initcwndbps=1255000&vprv=1&svpuc=1&mime=audio%2Fmp4&rqh=1&gir=yes&clen=1295035&dur=212.183&lmt=1717047826596234&mt=1727157900&fvip=2&keepalive=yes&c=ANDROID_TESTSUITE&txp=4532434&sparams=expire%2Cei%2Cip%2Cid%2Citag%2Csource%2Crequiressl%2Cxpc%2Cvprv%2Csvpuc%2Cmime%2Crqh%2Cgir%2Cclen%2Cdur%2Clmt&sig=AJfQdSswRQIgWMJorIvdLaJa5oqpWV2xWTAuk1sV8oTZ1wjj0TeXq6gCIQCc0aP2FLhIo6RzJJTNQZQs5HSHpoG2h5Xv3gTQ0Bn8RQ%3D%3D&lsparams=mh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpl%2Cinitcwndbps&lsig=ABPmVW0wRQIhALudieGQmoIh_qLTgz_EaXn6q9wm5H7WjebX_se0h7RUAiBSsjkCUszwNDJH4RTT4nHrhSy_BFuKV4TuG7ll5go6_A%3D%3D mimeType: audio/mp4; codecs="mp4a.40.5" bitrate: 50079 initRange: start: '0' end: '731' indexRange: start: '732' end: '1027' lastModified: '1717047826596234' contentLength: '1295035' quality: tiny projectionType: RECTANGULAR averageBitrate: 48827 audioQuality: AUDIO_QUALITY_LOW approxDurationMs: '212183' audioSampleRate: '22050' audioChannels: 2 parsedContentLength: 1.24 MiB lengthSeconds: '212' parsedLastModified: '2024-05-30T05:43:46.596Z' - itag: 140 url: >- https://rr1---sn-8vq54voxpu-925e.googlevideo.com/videoplayback?expire=1727179901&ei=HVjyZoX0DraCi9oPuJLFyAI&ip=31.26.138.243&id=o-AGFdx643g1zp1pVHAn6l5PANXDz8Nvmg7DncE_45cMM6&itag=140&source=youtube&requiressl=yes&xpc=EgVo2aDSNQ%3D%3D&mh=7c&mm=31%2C29&mn=sn-8vq54voxpu-925e%2Csn-hpa7zns6&ms=au%2Crdu&mv=m&mvi=1&pl=21&initcwndbps=1255000&vprv=1&svpuc=1&mime=audio%2Fmp4&rqh=1&gir=yes&clen=3433605&dur=212.091&lmt=1717047821006373&mt=1727157900&fvip=2&keepalive=yes&c=ANDROID_TESTSUITE&txp=4532434&sparams=expire%2Cei%2Cip%2Cid%2Citag%2Csource%2Crequiressl%2Cxpc%2Cvprv%2Csvpuc%2Cmime%2Crqh%2Cgir%2Cclen%2Cdur%2Clmt&sig=AJfQdSswRAIga0ETV3wIzfWxNuu_lGfcvjsfUXpH8E-WIyji7IufSAMCICJcXNhLSWKt7P7r6FRQIwWeui_BseZ7jSYCAf6esbDh&lsparams=mh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpl%2Cinitcwndbps&lsig=ABPmVW0wRQIhALudieGQmoIh_qLTgz_EaXn6q9wm5H7WjebX_se0h7RUAiBSsjkCUszwNDJH4RTT4nHrhSy_BFuKV4TuG7ll5go6_A%3D%3D mimeType: audio/mp4; codecs="mp4a.40.2" bitrate: 130675 initRange: start: '0' end: '722' indexRange: start: '723' end: '1018' lastModified: '1717047821006373' contentLength: '3433605' quality: tiny projectionType: RECTANGULAR averageBitrate: 129514 highReplication: true audioQuality: AUDIO_QUALITY_MEDIUM approxDurationMs: '212091' audioSampleRate: '44100' audioChannels: 2 parsedContentLength: 3.27 MiB lengthSeconds: '212' parsedLastModified: '2024-05-30T05:43:41.006Z' - itag: 249 url: >- https://rr1---sn-8vq54voxpu-925e.googlevideo.com/videoplayback?expire=1727179901&ei=HVjyZoX0DraCi9oPuJLFyAI&ip=31.26.138.243&id=o-AGFdx643g1zp1pVHAn6l5PANXDz8Nvmg7DncE_45cMM6&itag=249&source=youtube&requiressl=yes&xpc=EgVo2aDSNQ%3D%3D&mh=7c&mm=31%2C29&mn=sn-8vq54voxpu-925e%2Csn-hpa7zns6&ms=au%2Crdu&mv=m&mvi=1&pl=21&initcwndbps=1255000&vprv=1&svpuc=1&mime=audio%2Fwebm&rqh=1&gir=yes&clen=1232413&dur=212.061&lmt=1717047819209140&mt=1727157900&fvip=2&keepalive=yes&c=ANDROID_TESTSUITE&txp=4532434&sparams=expire%2Cei%2Cip%2Cid%2Citag%2Csource%2Crequiressl%2Cxpc%2Cvprv%2Csvpuc%2Cmime%2Crqh%2Cgir%2Cclen%2Cdur%2Clmt&sig=AJfQdSswRQIgT1IgHRdP6_0ejnZKkTKrWFF3UWNbYA4N9MNbKOQQJL4CIQDu5ccVYqi0UDWjx3vm9IXdnutM514_3yRrzqczVavudQ%3D%3D&lsparams=mh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpl%2Cinitcwndbps&lsig=ABPmVW0wRQIhALudieGQmoIh_qLTgz_EaXn6q9wm5H7WjebX_se0h7RUAiBSsjkCUszwNDJH4RTT4nHrhSy_BFuKV4TuG7ll5go6_A%3D%3D mimeType: audio/webm; codecs="opus" bitrate: 49668 initRange: start: '0' end: '265' indexRange: start: '266' end: '635' lastModified: '1717047819209140' contentLength: '1232413' quality: tiny projectionType: RECTANGULAR averageBitrate: 46492 audioQuality: AUDIO_QUALITY_LOW approxDurationMs: '212061' audioSampleRate: '48000' audioChannels: 2 parsedContentLength: 1.18 MiB lengthSeconds: '212' parsedLastModified: '2024-05-30T05:43:39.209Z' - itag: 250 url: >- https://rr1---sn-8vq54voxpu-925e.googlevideo.com/videoplayback?expire=1727179901&ei=HVjyZoX0DraCi9oPuJLFyAI&ip=31.26.138.243&id=o-AGFdx643g1zp1pVHAn6l5PANXDz8Nvmg7DncE_45cMM6&itag=250&source=youtube&requiressl=yes&xpc=EgVo2aDSNQ%3D%3D&mh=7c&mm=31%2C29&mn=sn-8vq54voxpu-925e%2Csn-hpa7zns6&ms=au%2Crdu&mv=m&mvi=1&pl=21&initcwndbps=1255000&vprv=1&svpuc=1&mime=audio%2Fwebm&rqh=1&gir=yes&clen=1630086&dur=212.061&lmt=1717047822840442&mt=1727157900&fvip=2&keepalive=yes&c=ANDROID_TESTSUITE&txp=4532434&sparams=expire%2Cei%2Cip%2Cid%2Citag%2Csource%2Crequiressl%2Cxpc%2Cvprv%2Csvpuc%2Cmime%2Crqh%2Cgir%2Cclen%2Cdur%2Clmt&sig=AJfQdSswRQIgI4Vwy12m6UidKdL0SqCi5G7nbKx1UAXev-TObNRRlGICIQDA0SL6AnZEqhpvypdLKdwR2QtcsUZQSVk-exV4Z10Vaw%3D%3D&lsparams=mh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpl%2Cinitcwndbps&lsig=ABPmVW0wRQIhALudieGQmoIh_qLTgz_EaXn6q9wm5H7WjebX_se0h7RUAiBSsjkCUszwNDJH4RTT4nHrhSy_BFuKV4TuG7ll5go6_A%3D%3D mimeType: audio/webm; codecs="opus" bitrate: 65984 initRange: start: '0' end: '265' indexRange: start: '266' end: '636' lastModified: '1717047822840442' contentLength: '1630086' quality: tiny projectionType: RECTANGULAR averageBitrate: 61494 audioQuality: AUDIO_QUALITY_LOW approxDurationMs: '212061' audioSampleRate: '48000' audioChannels: 2 parsedContentLength: 1.55 MiB lengthSeconds: '212' parsedLastModified: '2024-05-30T05:43:42.840Z' - itag: 251 url: >- https://rr1---sn-8vq54voxpu-925e.googlevideo.com/videoplayback?expire=1727179901&ei=HVjyZoX0DraCi9oPuJLFyAI&ip=31.26.138.243&id=o-AGFdx643g1zp1pVHAn6l5PANXDz8Nvmg7DncE_45cMM6&itag=251&source=youtube&requiressl=yes&xpc=EgVo2aDSNQ%3D%3D&mh=7c&mm=31%2C29&mn=sn-8vq54voxpu-925e%2Csn-hpa7zns6&ms=au%2Crdu&mv=m&mvi=1&pl=21&initcwndbps=1255000&vprv=1&svpuc=1&mime=audio%2Fwebm&rqh=1&gir=yes&clen=3437753&dur=212.061&lmt=1717047822556748&mt=1727157900&fvip=2&keepalive=yes&c=ANDROID_TESTSUITE&txp=4532434&sparams=expire%2Cei%2Cip%2Cid%2Citag%2Csource%2Crequiressl%2Cxpc%2Cvprv%2Csvpuc%2Cmime%2Crqh%2Cgir%2Cclen%2Cdur%2Clmt&sig=AJfQdSswRAIgPQ-Q-5PkH0mnKI6pXIOEj7f_qrvovoGY7VCh8F4M7ZQCIGy0TOgdwKUHiE3xi0Jm8VqfgUXpQ9TlSSZtk4xXHdcV&lsparams=mh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpl%2Cinitcwndbps&lsig=ABPmVW0wRQIhALudieGQmoIh_qLTgz_EaXn6q9wm5H7WjebX_se0h7RUAiBSsjkCUszwNDJH4RTT4nHrhSy_BFuKV4TuG7ll5go6_A%3D%3D mimeType: audio/webm; codecs="opus" bitrate: 136946 initRange: start: '0' end: '265' indexRange: start: '266' end: '636' lastModified: '1717047822556748' contentLength: '3437753' quality: tiny projectionType: RECTANGULAR averageBitrate: 129689 audioQuality: AUDIO_QUALITY_MEDIUM approxDurationMs: '212061' audioSampleRate: '48000' audioChannels: 2 parsedContentLength: 3.28 MiB lengthSeconds: '212' parsedLastModified: '2024-05-30T05:43:42.556Z' '400': description: Bad Request content: application/json: schema: type: object properties: success: type: boolean enum: - false error: type: object properties: issues: type: array items: type: object properties: code: type: string maximum: type: number type: type: string inclusive: type: boolean exact: type: boolean message: type: string path: type: array items: type: string required: - code - type - message - path name: type: string enum: - ZodError required: - issues - name required: - success - error example: success: false error: issues: - code: too_big maximum: 11 type: string inclusive: true exact: true message: String must contain exactly 11 character(s) path: - videoId name: ZodError '403': description: Forbidden content: application/json: schema: type: object properties: error: type: object properties: message: type: string required: - message required: - error example: error: message: Forbidden security: - Bearer: [] components: securitySchemes: Bearer: type: http scheme: bearer bearerFormat: JWT ````