right|thumb|A cluster of four homemade octobans.
right|thumb|A cluster of four homemade octobans.
Octobans, also known as tube toms, are deep, small diameter, single-head tom-toms. Octobans were originally grouped in melodically tuned sets of eight, hence the name, in reference to octave and from octo meaning "eight".
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).