Two people making sounds together can quickly produce a crowded texture. A simple agreement—leave some openings unanswered—creates another possibility for a small improvised duet.
Choose quiet sounds you can make comfortably, such as a soft tabletop tap or a short hum. Begin with one person offering a phrase. The other may answer, wait, or remain silent. Nobody has to fill the space merely because it is available.
Try a different responsibility
For one round, make the second person responsible for ending rather than continuing. Their single response should suggest a stopping point. For another round, let both people decide independently when the piece is complete.
Discuss what signalled an ending: a longer gap, a repeated gesture, or a change in the shape of a response. Disagreement is part of the exercise. It shows which signals each person heard.
Do not judge the result by the amount of material produced. A short exchange may have a clearer identity than a minute of constant activity.
If you record a round, get everyone’s agreement first and keep it for the purpose you discussed. The most useful replay question is specific: which moment allowed the other person’s idea to become audible?