In sound card application settings (ASUS Audio Center, C-Media Panel, XonarSwitch): Let us know if the issue persists, and we will be glad to assist you.Guide to achieve best audio quality, performance and functionality for Xonar cards and other CMI8788 audio chipset cards.
Set Sample Rate to 44.1 kHz, this is generally good for most media (games, movies, music), while video DVDs and Blu-rays and some of the Hi-Res Audio music have a sample rate of 48 kHz. Increasing Sample Rate without having a source that’s sampled at a higher rate won’t improve sound quality, in fact, it will degrade it. Select Audio Channel/System input (present only in Win Vista, 7, 8, 10) and Analog Out/System Output settings based on the number of speakers that you have. For a 2.1 audio system, select Audio Channel to 2 and Analog Out to 2.įor a 5.1 audio system select Audio Channel to 6 and Analog Out to 5.1. If you wish to emulate 8 channels surround on 2 channel headphones, set the number of channels to 8, analog output to “Headphones”, enable “Dolby Headphones” and “7.1 virtual speaker shifter”.īy default, selecting more channels than the number of speakers you have connected won’t enable you to hear more sounds or hear the footsteps and positioning of enemies better in games. If you have 2 speakers and a standalone subwoofer that is connected directly to the audio card check this guide. GX is responsible with emulating EAX effects in some older games, but it’s know to cause crashes, audio loops in games and BSODs while it's enabled. 
If your Xonar card has a dedicated headphone amplifier, set the soundcards output impedance/gain ( Ω = ohm) to a value close to the headphones input impedance (look for it in specifications, data sheet or manual). Do not set the impedance much higher as it may damage the headphones. Headphones AMP (impedance) options are only available when Analog Out is set to Headphone. In ASUS Audio Center click the Hammer icon to select a different output impedance. In XonarSwitch this is available under Headphones Gain. 
I'm not aware of an option to control the output impedance being available in C-Media Panel. The effects will increase the DPC latency, which in turn could cause other problems like audio/video desynchronization or slow network/internet speed.
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