Set different notification sounds for email, sms etc

SET SMS NOTIFICATION
To Messaging > Press Option key > Settings > Select Ringtone > Select your choice




































SET EMAIL NOTIFICATION
To Gmail > Press Option key > Settings > Select email account > Rigntone & vibrate > Ringtone > Select your choice



































SET WHATSAPP NOTIFICATION
To WhatsApp > Press Option key > Settings > Notifications > Notification tone  >  Select your choice
[Note: You have to set Message and Group notification]