Verbose printk

configname: CONFIG_SND_VERBOSE_PRINTK

Linux Kernel Configuration
└─>Device Drivers
└─>Sound card support
└─>Advanced Linux Sound Architecture
└─>Verbose printk
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
Say Y here to enable verbose log messages. These messages
will help to identify source file and position containing
printed messages.

You don't need this unless you're debugging ALSA.