ɛndˈoːɹsmənts fɹʌm pɹˈɑːdʌkt mˌænjuːfˈæktʃɚɹɚz, sˈɜːʔn̩li ɪnðə kˈeɪs ʌv mjˈuːzɪkəl ˈɪnstɹəmənts, ɹᵻkwˈaɪɚz ɐ pˈɜːsənəl ɹᵻlˈeɪʃənʃˌɪp bᵻtwˌiːn ɐn ˈɑːɹɾɪst ænd pɹəfˈɛʃənəl sˈɜːvɪsᵻz ɹˌɛpɹᵻzˈɛntətˌɪv.
Endorsements from product manufacturers, certainly in the case of musical instruments, requires a personal relationship between an artist and professional services representative.