The RightMark Audio Analyzer suite is designed for testing quality of analog and digital paths of any audio devices, be it a sound card, an MP3 player, a consumer CD/DVD player or an acoustic set. The results are obtained by playing and recording test signals passed through the tested audio path by means of frequency analysis algorithms. The latest version of RightMark Audio Analyzer can be found here.
The GIGABYTE Z77X-UP7 pretty much rocked the ASUS P8Z77-V in all things audio. Rightmark Audio Analyzer gave the Z77X-UP7 a general performance rating of Very Good while the ASUS P8Z77-V was given a rating of good.