Why are there two voices in the SMS sent by htc g7?

I don't quite understand the landlord's question, but the SMS sound can be set by myself except the one that comes with the fuselage. Create the following folders on the SD card: alarm clock, ringtone and notification. These three folders are alarm clock, incoming call and SMS notification. Put your ringtones into these folders, and these files will automatically appear in the previous settings. If it doesn't appear immediately, you need to restart your phone. I hope I can help you.