Support digital beep via input layer

configname: CONFIG_SND_HDA_INPUT_BEEP

Linux Kernel Configuration
└─>Device Drivers
└─>Sound card support
└─>Advanced Linux Sound Architecture
└─>HD-Audio
└─>Support digital beep via input layer
In linux kernel since version 2.6.28 (release Date: 2008-12-24)  
Say Y here to build a digital beep interface for HD-audio
driver. This interface is used to generate digital beeps.