General Audio Problems IMPORTANT NOTE: You may encounter distorted sound and/or choppy gameplay if your sound card is not 100% DirectX® compatible. The following sound cards may not fully support DirectX: Yamaha® OPL3 series AD (Analog Devices) Sound 2 Ensoniq™ (Gateway™ 2000) IBM™'s MWAVE Compaq's ESS You may want to contact your sound card manufacturer to see if your card is 100% DirectX compatible. Most sound card problems are remedied by installing the latest version of DirectX, or obtaining newer sound card drivers (usually maintained for free download on the hardware manufacturers web site). This is highly recommended and easy to do. You can contact your sound card manufacturer for details. PLEASE NOTE: DirectX 8.0a is included on the Return to Castle Wolfenstein CD. Please consult the DirectX Section of this help system for more information. Checking Your Sound Card For Conflicting Settings.