This trademark will be associated with copyright material delivered via media such as CD or by WEB site download, which guides a choral singer using a step-by-step warm-up exercise sequence to avoid voice strain, and improve singing range and vocal stamina.
This trademark will be associated with copyright material delivered via media such as CD or by WEB site download, which guides a choral singer using a step-by-step warm-up exercise sequence to avoid voice strain, and improve singing range and vocal stamina.
This trademark will be associated with copyright material delivered vi...
