A short rhythm can become longer without changing the relationship between its parts. Doubling every sound and gap offers a way to hear that relationship clearly.
Invent a pattern using counts: one count of sound, one count of silence, two counts of sound. For the second version, use two counts of sound, two of silence and four of sound. Keep a comfortable counting pace throughout both versions.
You can use a gentle hum for sustained sounds, stopping whenever it feels uncomfortable, or draw the durations while somebody else counts. There is no need to hold a note beyond an easy breath.
Include the gaps
If you double only the sounds while leaving the silences unchanged, you have made a different transformation. Try that version separately and compare it with the fully stretched phrase.
Ask a listener what remains recognisable. They might point to the order of long and short events or to the location of the pause. Their answer need not use formal terminology to be precise.
Finish by placing the original and stretched versions next to each other in a tiny composition. Decide whether the second feels like a reply, an explanation or a slowing of attention. The comparison becomes useful when you can identify the particular durations responsible for that impression.
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