set duration from audio file length

I wonder what you think about this:

clips: [{ audio: './audioclip.ogg', layers: [{ type: "fabric", func }] }]

if duration isn't set then it will set the duration to the length of the audio file?

maybe the default could be to use the length of the video first but a person could set duration to be the length of the audio:

defaults: {
    duration = audio,
},
clips: [{ audio: './audioclip.ogg', layers: [{ type: "fabric", func }] }]

or

clips: [{ duration: length('./audioclip.ogg'), audio: './audioclip.ogg', layers: [{ type: "fabric", func }] }]

No files, tests, or entry points are identified in the issue. Start by reviewing how the shown clip configuration handles duration and decide which proposed behavior is intended. Done means the chosen duration rule is implemented and covered by appropriate validation or tests.