Зайти на сайт фирмы Graupner, порыться в каталогах ит.д.
Помню в 80-тые продавались брелки с разными звуками из серии Blaster войны … там одна “капля” на плате и пьезо\излучател. (или миниатюрный динамик)
Может в этом направлении поискать, хотя антиквар блин. (но было зашито очень много и очень разного!)
Например: есть одна морская ракушка … а где то есть две! Стерео типа. (вообще улет) … и кто то этим занимается.
“По чём” вопрос не стоит. Наверняка 0.5$ мешок чипов … где всё это ?
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