Audio tools - Infery.ai

4 tools. Each one is deterministic: the same input gives the same output, and nothing is inferred. Call one directly with POST /v1/capabilities/{id}/run, or use it as a step in a workflow. Prices are on the live catalogue — they change, and a stale price here would be worse than none.

Tool	Does	In → out
`audio.concat`	Join multiple audio clips end-to-end.	audio → audio
`audio.pipeline`	Chain multiple audio operations in one step.	audio → audio
`audio.transcode`	Re-encode an audio file to a different format/bitrate.	audio → audio
`audio.trim`	Extract a time range from an audio file.	audio → audio

`audio.concat`

audio → audio · Billed per second Join two or more audio clips end-to-end into a single continuous output file.

When to use

Assemble a podcast — stitch intro, body segments, and outro together.
Merge split recordings — combine parts recorded in separate sessions.
Build playlists — produce a single deliverable file from ordered tracks.

Inputs & outputs


Input modality	Audio files (list of URLs)
Output modality	Audio file (GCS URL)
Min clips	2
Max clips	10
Max total size	5 GB

Parameters

No operation-level parameters. All input URLs are supplied as audios in the input object.

Param	Required	Description
(none)	—	Clips are joined in the order provided in `audios`.

Examples

Join two podcast segments

{
  "type": "audio.concat",
  "input": {
    "audios": [
      "https://example.com/example/part1.mp3",
      "https://example.com/example/part2.mp3"
    ]
  },
  "params": {}
}

Assemble three tracks in order

{
  "type": "audio.concat",
  "input": {
    "audios": [
      "https://example.com/example/intro.mp3",
      "https://example.com/example/main.mp3",
      "https://example.com/example/outro.mp3"
    ]
  },
  "params": {}
}

audio.trim — trim individual clips before concatenating
audio.transcode — re-encode the concatenated output
audio.pipeline — chain concat with other audio ops in one step
video.concat — equivalent operation for video files

Examples

Join two clips

{
  "type": "audio.concat",
  "params": {}
}

`audio.pipeline`

audio → audio · Billed per second Chain up to 10 audio operations in a single execution, eliminating intermediate uploads.

When to use

Trim then transcode — cut a segment and immediately re-encode it.
Complex workflows — multiple dependent steps without round-trip overhead.
Atomic processing — all operations succeed or the whole pipeline fails cleanly.

Inputs & outputs


Input modality	Audio file (URL)
Output modality	Audio file (GCS URL)
Max operations	10
Max input size	2 GB

Parameters

Param	Required	Description
`operations`	yes	Ordered array of 1–10 operation objects. Each object is one of: `{ trim }`, `{ transcode }`, `{ concat }`.

Each operation uses the same parameter shape as the corresponding standalone capability.

Examples

Trim first 30 s, then convert to MP3

{
  "type": "audio.pipeline",
  "input": { "audio_url": "https://example.com/example/recording.wav" },
  "params": {
    "operations": [
      { "trim": { "start": 0, "end": 30 } },
      { "transcode": { "format": "mp3", "bitrate": "192k" } }
    ]
  }
}

Transcode to AAC at reduced bitrate

{
  "type": "audio.pipeline",
  "input": { "audio_url": "https://example.com/example/master.flac" },
  "params": {
    "operations": [
      { "trim": { "start": 10, "end": 120 } },
      { "transcode": { "format": "aac", "bitrate": "128k" } }
    ]
  }
}

audio.transcode — standalone format conversion
audio.trim — standalone time-range extraction
audio.concat — standalone clip joining
video.pipeline — equivalent multi-op pipeline for video files

Examples

Trim then transcode

{
  "type": "audio.pipeline",
  "params": {
    "operations": [
      {
        "trim": {
          "start": 0,
          "end": 30
        }
      },
      {
        "transcode": {
          "format": "mp3"
        }
      }
    ]
  }
}

`audio.transcode`

audio → audio · Billed per second Re-encode an audio file to a different container format and/or bitrate.

When to use

Convert for compatibility — WAV or FLAC source needs MP3/AAC for web delivery.
Reduce file size — lower bitrate for streaming or podcast distribution.
Normalize format — standardize uploads to a single codec before pipeline processing.

Inputs & outputs


Input modality	Audio file (URL)
Output modality	Audio file (GCS URL)
Max input duration	3 hours
Max input size	2 GB

Parameters

Param	Required	Description
`format`	yes	Output container — `mp3`, `wav`, `aac`, `flac`
`bitrate`	no	Target bitrate as `<int>[k\|M]`, e.g. `192k`, `320k`. Lossy formats only (`mp3`, `aac`) — sending it with `wav` or `flac` is rejected, because a lossless encoder has no bitrate to set.

Examples

WAV to MP3 at 192k

{
  "type": "audio.transcode",
  "input": { "audio_url": "https://example.com/example/recording.wav" },
  "params": { "format": "mp3", "bitrate": "192k" }
}

FLAC to AAC for mobile delivery

{
  "type": "audio.transcode",
  "input": { "audio_url": "https://example.com/example/master.flac" },
  "params": { "format": "aac", "bitrate": "128k" }
}

audio.trim — cut to a time range before transcoding
audio.concat — join clips first, then transcode the combined output
audio.pipeline — chain trim + transcode in one step
video.extract_audio — pull the audio track out of a video first

Examples

WAV → MP3 192k

{
  "type": "audio.transcode",
  "params": {
    "format": "mp3",
    "bitrate": "192k"
  }
}

`audio.trim`

audio → audio · Billed per second Extract a specific time range from an audio file, discarding everything outside it.

When to use

Create a clip — isolate a highlight or excerpt from a long recording.
Remove silence — cut leading/trailing silence from a podcast or voiceover.
Prepare for concatenation — trim individual segments before joining with audio.concat.

Inputs & outputs


Input modality	Audio file (URL)
Output modality	Audio file (GCS URL)
Max input duration	3 hours
Max input size	2 GB

Parameters

Param	Required	Description
`start`	yes	Start time in seconds (non-negative). `0` = beginning of file.
`end`	yes	End time in seconds (positive, must be > `start`).

Examples

Extract the first 60 seconds

{
  "type": "audio.trim",
  "input": { "audio_url": "https://example.com/example/podcast.mp3" },
  "params": { "start": 0, "end": 60 }
}

Extract a mid-section highlight (90–150 s)

{
  "type": "audio.trim",
  "input": { "audio_url": "https://example.com/example/podcast.mp3" },
  "params": { "start": 90, "end": 150 }
}

audio.transcode — re-encode the trimmed output to a different format
audio.concat — join multiple trimmed segments end-to-end
audio.pipeline — combine trim with other audio ops in a single execution
video.trim — equivalent operation for video files

Examples

First 60 seconds

{
  "type": "audio.trim",
  "params": {
    "start": 0,
    "end": 60
  }
}

​audio.concat

​When to use

​Inputs & outputs

​Parameters

​Examples

​Join two podcast segments

​Assemble three tracks in order

​Related capabilities

​Examples

​audio.pipeline

​When to use

​Inputs & outputs

​Parameters

​Examples

​Trim first 30 s, then convert to MP3

​Transcode to AAC at reduced bitrate

​Related capabilities

​Examples

​audio.transcode

​When to use

​Inputs & outputs

​Parameters

​Examples

​WAV to MP3 at 192k

​FLAC to AAC for mobile delivery

​Related capabilities

​Examples

​audio.trim

​When to use

​Inputs & outputs

​Parameters

​Examples

​Extract the first 60 seconds

​Extract a mid-section highlight (90–150 s)

​Related capabilities

​Examples

`audio.concat`

When to use

Inputs & outputs

Parameters

Examples

Join two podcast segments

Assemble three tracks in order

Related capabilities

Examples

`audio.pipeline`

When to use

Inputs & outputs

Parameters

Examples

Trim first 30 s, then convert to MP3

Transcode to AAC at reduced bitrate

Related capabilities

Examples

`audio.transcode`

When to use

Inputs & outputs

Parameters

Examples

WAV to MP3 at 192k

FLAC to AAC for mobile delivery

Related capabilities

Examples

`audio.trim`

When to use

Inputs & outputs

Parameters

Examples

Extract the first 60 seconds

Extract a mid-section highlight (90–150 s)

Related capabilities

Examples