Not always. In parts of northern Australia, naturally hollow branches were common enough that makers could select a suitable piece rather than bore out a solid log from end to end.
Baldwin Spencer wrote that in northern parts of the Northern Territory it was “very rare” to find branches that were not hollow, making it easy to find one suitable for a trumpet. Herbert Basedow also described long hollow limbs being used.
The instrument still needed preparation. Writers recorded trimming the tube, smoothing the mouth end and adding wax or resin so the lips fitted tightly. Bamboo instruments also had internal sections removed where necessary.
So a traditional wooden didgeridoo could involve skilled selection and finishing rather than simply drilling a solid branch. The exact method depended on the material and local practice.
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