Output in terms of flitches ranged from one tree to another: between 19 and 32% if calculated from logs volume, and between 13 and 30% if calculated from volume of the standing trees.
Evolution of defects along the trees indicated the tree section from 1 m to 12 m above the ground for musical instruments manufacturing. The frequency of zero defective samples was 60%. The material was analysed for defects in all stages of conversion.
Ten resonance spruces were felled and gradually turned into semi-manufactured musical instruments. This study was completed on the largest Romanian resonance wood resource, to maximize outputs of flitches for violin, cello, and double bass instruments by optimizing traditional requirements regarding quality of raw material with its current level. Consequently, to meet the need for raw material to manufacture musical instruments, sorting has become the key operation of exploitation.
Increasing demand for resonance spruce has led to gradual depletion of resources in traditional areas. ' Musical instrument lumber recovery from Romanian resonance spruces,' BioRes. T., Dinulica, F., Bartha, S., Vasilescu, M.
