Mix volume between background audio and video clip audio

[jamtartley]

Is it possible to fade in/out the background audio track while certain video clips are playing their audio?
This is how I am currently attempting to do that - by setting the mixVolume of the clip to 1 if it is marked as requiring audio.
As it is now, the background audio file just plays at full volume and the audio from the video clips isn't audible.

await editly({
  outPath,
  audioFilePath,
  loopAudio: true,
  keepSourceAudio: true,
  audioNorm: { enable: true, gaussSize: 3, maxGain: 100 },
  clips: [
    ...schedule.map(take => ({
        layers: [
          {
            type: "video",
            path: pathForLocalTake(take._id),
            resizeMode: "contain-blur",
            mixVolume: take.prompt.requiresAudio ? 1 : 0,
          },
      ]
    })),
  ],
  defaults: {
    transition: {
      name: "dummy",
    },
  },
});

• I have tried with the newest version of editly: npm i -g editly or npm i editly@latest
• I have tried ffmpeg newest stable version
• I have searched for existing issues

[mifi]

not currently possible to fade audio of a video clip at arbitrary times inside the clip's duration.