track with a specific time frame

I would like to make a file with a track that is a specific time frame (5:04 seconds) and no more, no less. I do not have any audio and in fact I just want a soundless time keeper in my playlist. How do I create such a file?

Open Audacity and before opening any file: Generate → Silence.

Then, File → Export in your desired format.

Note this may not be absolute silence when you export because Audacity may add very quiet dither noise - see .