Inclusion Criteria:  All classifications of hearing loss (sensorineural, conductive, mixed)  If the hearing loss is conductive or mixed it must be approved for amplification by a physician All shapes of hearing loss (flat, sloping, reverse slope, notch) Severity ranging from mild to severe German speaking Play a musical instrument Both genders Ages 18 and older Ability and willingness to sign the consent form  Exclusion Criteria:  Normal hearing  Contraindications for amplification Active ear disease Don't play an instrument Inability to follow the procedures of the study due to language problems, psychological disorders, dementia, or other cognitive problems of the participant A reduced mobility making them unable to attend weekly study appointments A reduced ability to describe auditory impressions and the usage of the hearing aids Uncooperative so that it is not possible to record a valid pure tone audiogram A strongly reduced dexterity Central hearing disorders Bernafon employees Family members of Bernafon employees