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.
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The Intel DX58S02 X58 motherboard brought some hurt to the GIGABYTE G1 Assassin. The Intel DX58S02 uses an Intel High Definition audio subsystem, while the GIGABYTE G1 Assassin uses the Creative CA20K2 processor. The frequency response of the Intel DS58S02 had a rating of Excellent while the Creative CA20K2 had a rating of Very Good. The GIGABYTE G1 Assassin and the Creative CA20K2 had better Noise level, Dynamic range, and Stereo crosstalk ratings while the Intel DX58S02 scored better in the THD, THD + Noise, IMD + Noise, and the IMD at 10 kHz. When it came down the the general performance rating the Intel DX58S02 with the Intel High Definition Audio had a Very Good rating while the GIGABYTE G1 Assassin had a rating of Good.