Update README.md

README.md

 # Amsterdam Sounds Serval
 
-Sound recordings used for training the Serval sound classification sensor.
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+Sound recordings used for training the Serval sound classification sensor.
+
+**this library contains:**
+
+(A) moped/scooter alarms
+(B) mopeds/scooters
+(C) horns
+(K) shutting car doors
+(M) noisy people
+(O) motor bikes
+(T) terrace sounds
+(V) amplified music