# Make.com - Concatenate Audio Files

**URL:** <https://community.transloadit.com/t/make-com-concatenate-audio-files/17536>\
**Category:** Transloadit\
**Created:** [April 5, 2025, 5:59am UTC](https://community.transloadit.com/t/make-com-concatenate-audio-files/17536 "2025-04-05T05:59:20Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![salardo](https://yyz2.discourse-cdn.com/flex032/user_avatar/community.transloadit.com/salardo/32/1357_2.png) [@salardo](https://community.transloadit.com/u/salardo)\
**Post date:** [April 5, 2025, 5:59am UTC](https://community.transloadit.com/t/make-com-concatenate-audio-files/17536/1 "2025-04-05T05:59:20Z")

</div>

Hi,

I am trying to create a [make.com](http://make.com) automation flow where I concatenate 3 audio files in order. I am facing issues when parsing the following data. I am using Transloadit native integration module \> “Create an assembly”. As for The method of presenting the instructions of the assembly \*I have chosen a “Step” and have pasted the following in the Steps body:

```auto
{
  "steps": {
    "first": {
      "robot": "/http/import",
      "result": true,
      "url": "https://demos.transloadit.com/inputs/powered-by.mp3"
    },
    "second": {
      "robot": "/http/import",
      "result": true,
      "url": "https://demos.transloadit.com/inputs/powered-by.mp3"
    },
    "merged": {
      "robot": "/audio/concat",
      "preset": "mp3",
      "result": true,
      "ffmpeg_stack": "v6.0.0",
      "use": {
        "steps": [
          {
            "name": "first",
            "as": "audio_1"
          },
          {
            "name": "second",
            "as": "audio_2"
          }
        ]
      }
    },
    "export": {
      "robot": "/export/url",
      "use": "merged"
    }
  }
}

```

I am not sure what the issue is but it keeps giving me a 400 error.