•Check if you are using a Dolby Digital Live encoder through the S/PDIF output. If this is the case, the analog output is muted to get rid of any interference between your digital speaker system and analog speakers or headphones.

•Try rebooting your computer.

I cannot hear any sound from the S/PDIF output.

•Ensure that you have enabled S/PDIF output in the Xonar Essence ST Audio Center.

•Ensure that you have connected the correct S/PDIF output jack on the card to the decoder’s (AV receiver) S/PDIF input jack.

•You may need to select the correct input and mode of your decoder or AV receiver. For Dolby Digital output, double-check that the AV receiver is in that decoding mode.

•If you are using 192KHz PCM output, ensure your decoder can support 192KHz decoding. Try changing it to 44.1K or 48KHz first.

I cannot hear audio input (Mic, Line-in, or AUX) from my speakers.

•Go to the Mixer recording page in the Xonar Essence ST Audio Center and select the correct input as the recording source. If you are using Windows® Vista, go to the system audio control panel to ensure that the current default recording/input device is correct.

•Remember to turn on the digital monitoring button for that recording source.

I cannot hear the TV tuner audio from my speakers.

•If you are using a traditional TV tuner card that has an analog audio output, connect it to the Aux-In header on the audio card.

•Select Aux-In as the recording source and remember to turn on the digital monitoring button on the recording mixer page.

•IIf you are using a TV tuner card which has a digital audio output instead of an analog output, check that the sound is not muted and whether other applications can play sound out. If you still have problems, read the TV tuner card’s software user manual.

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ASUS Xonar Essence ST