▁micro phone ▁on ▁the ▁device . ▁The ▁software ▁is ▁available ▁for ▁Android , ▁mac OS , ▁iOS , ▁watch OS , ▁tv OS , ▁and ▁Windows . ▁▁ ▁The ▁original ▁developer ▁of ▁the ▁app , ▁Sh az am ▁Entertainment ▁Limited ▁was ▁founded ▁in ▁ 1 9 9 9 ▁by ▁Chris ▁Bart on , ▁Philip ▁Ing hel bre cht , ▁A very ▁Wang , ▁and ▁D hi raj ▁M uk her je e . ▁On ▁ 2 4 ▁September ▁ 2 0 1 8 , ▁the ▁company ▁was ▁acquired ▁by ▁Apple ▁for ▁a ▁reported ▁$ 4 0 0 ▁million . ▁ ▁Over view ▁Sh az am ▁ident ifies ▁songs ▁based ▁on ▁an ▁audio ▁finger print ▁based ▁on ▁a ▁time - fre quency ▁graph ▁called ▁a ▁spect ro gram . ▁It ▁uses ▁a ▁smart phone ▁or ▁computer ' s ▁built - in ▁micro phone ▁to ▁gather ▁a ▁brief ▁sample ▁of ▁audio ▁being ▁played . ▁Sh az am ▁stores ▁a ▁catalog ue ▁of ▁audio ▁finger print s ▁in ▁a ▁database . ▁The ▁user ▁tags ▁a ▁song ▁for ▁ 1 0 ▁seconds ▁and ▁the ▁application ▁creates ▁an ▁audio ▁finger print . ▁Sh az am ▁works ▁by ▁analyz ing ▁the ▁captured ▁sound ▁and ▁seeking ▁a ▁match ▁based ▁on ▁an ▁ac oust ic ▁finger print ▁in ▁a ▁database ▁of ▁millions ▁of ▁songs . ▁If ▁it ▁finds ▁a ▁match , ▁it ▁sends ▁information ▁such ▁as ▁the ▁artist , ▁song ▁title , ▁and ▁album ▁back ▁to ▁the ▁user . ▁Some ▁implementations ▁of ▁Sh az am ▁incorpor ate ▁relevant ▁links ▁to ▁services