You can set up the power consumption level when the system is in the Power Saving mode. A lower level of power saving will result in a more responsive tone generation but greater power consumption. On the contrary, a higher level of power saving will reduce power consumption but take more time for AC-XG to respond and may cause noise.


You can set a time for going to the Power Saving mode after AC-XG stops functioning. The time is calculated in second. The shorter the time is set, the sooner that AC-XG will go to the Power Saving mode. However, if Maximum Power Saving mode is selected, AC-XG will go for power saving frequently and may therefore cause to increase the occurrence of noise or slow down the response from AC-XG. If the time is set longer, it will reduce the frequency for AC-XG to enter the Power Saving mode; this, for example, will have significant affects on the battery life for a notebook. A longer time value, about 60 seconds, is recommended for the desktop computer, and a smaller value of about 5 seconds is recommended for the notebook PC.


The current status (On, Standby, or Off) of AC-XG Audio Device is shown. "On" indicates that the AC-XG is currently in operation. "Standby" indicates that AC-XG is currently in the Power Saving mode. "Off" indicates either that the driver is not installed or for some reason the device is not ready for use. In this case, go to the device manager to check out the problem.


This will remove noise and accelerate the response from AC-XG during the transition to the Power Saving mode, but more power will be consumed.


Noise occurs at the time of resume will be minimal, and the time till resume will be shorter. But the decrease of power consumption will not be much. In this mode, the playbacks of external analog inputs like CD audio are available.


Noise occurs at the time of resume will be minimal. However, the time till resume will be slightly longer, and power consumption is lesser. This setting is suitable for desktop PC as well as to Notebook PC when it connects to the AC power supply. In this mode, the playbacks of external analog inputs are unavailable.


Noise occurs at the time of resume will be bigger, and the time till resume will be longer. But the power consumption will be minimal. This setting is suitable for notebook PC that runs depending on battery life. In this mode, the playbacks of external analog inputs are unavailable.


XG is a MIDI synthesizer format proposed by YAMAHA, which keeps backward compatibility with GM system level 1. XG format supports features of extensible voice arrangements, a large number of voices, voice modifications, 3 synthesizer effects, and so on.

* XG is a trademark of Yamaha Corporation.


GM system level1 is a world standard for MIDI synthesizer, which provides formats for voice arrangements and MIDI function. Devices compliant to GM system level 1 are capable of playing different sounds in the same sound system.

*GM, which indicates GM system level1 compliant, is a trademark of Association of Musical Electronics Industry (AMEI).


The Synthesizer Effects allows you to control reverberation, chorus and variation effects of XG synthesizer.


The Reverberation adds a resounding effect to the acoustic sound and provides concert hall ambiance to the echo-back sound.


The Chorus feature provides a chorale effect to the musical sound.


The Variation allows different sound effects defined by XG format such as distortion, equalizer and pitch change to be added to the sound. Reverberation and Chorus can be adjusted using Variation.


The MIC Echo applies an echo effect to the microphone input, and the Mic echo effect is adjustable.

Note that recording will be disabled while Mic echo is in use and will not be enabled until Mic echo is turned off. To control MIC volume, go to the standard Windows Volume Control and adjust the microphone-input level.


When this option is selected, the Mic echo effect will be enabled to the microphone input. (It will be disabled once Windows is re-started.)


The Delay Time function allows you to set a cycle period for Mic echo to repeat. To lengthen the period, move the slider towards the right.


The Feedback Gain function allows you to set the duration period for Mic echo. To lengthen the duration period, move the slider towards the right.


AC-XG supports DOS applications for running on the Windows DOS-BOX. The configurations for running DOS applications are shown here, but cannot be changed.


AC-XG supports the 3D positional stereo audio mode based on the “Sensaura” technology developed by Central Research Laboratories Limited in England. When the 3D Sound mode is effective, sound can be experienced from all positions from 360 degrees via stereo speakers or headphones.

* Sensaura is a trademark of Central Research Laboratories Limited.


In general, the DirectSound 3D application defines whether the output should be routed to the stereo speakers or headphones. If a 3D application does not decide where to route the sound output, then AC-XG will take over the decision to force the 3D sound output.

 When Headphone is selected, the mode changeover routine in the DirectSound3D will be ignored and force the output to headphones with the optimal headphone output. When Speaker is selected, the mode changeover routine in the DirectSound3D will be ignored and force the output to change from the 3D mode to speakers with the optimal speaker output. When Application is selected, the mode changeover routine in the DirectSound3D application will be enabled.


This will ignore the mode changeover routine in the DirectSound 3D mode and force to output from headphones with the optimal headphone output.


This will ignore the mode changeover routine in the DirectSound 3D mode and force to output from speakers with the optimal speaker output.


This will enable the mode changeover routine in the DirectSound3D application.


When this option is selected, 3D buffer of DirectSound will be enabled. (The driver will handle 3D buffers.)

When this option is selected, the Sensuara 3D developed by CRL will become available and a rather high-quality 3D effect can be reached. When this option is unchecked, 3D effect will be handled by Microsoft standard and have rather general quality. If you encounter problems when this options is selected, uncheck the option to switch to MS standard process.

DO NOT click on the checkbox while the DirectSound application is running.


This will enable/disable the accelerator.


Specify the sound quality of the synthesizer. Make your selection suitable for your PC setup and your preference.


You can set up the power consumption level when the system is in the Power Saving mode. A lower level of power saving will result in a more responsive tone generation but greater power consumption. On the contrary, a higher level of power saving will reduce power consumption but take more time for AC-XG to respond and may cause noise.


You can set a time for going to the Power Saving mode after AC-XG stops functioning. The time is calculated in second. The shorter the time is set, the sooner that AC-XG will go to the Power Saving mode. However, if Maximum Power Saving mode is selected, AC-XG will go for power saving frequently and may therefore cause to increase the occurrence of noise or slow down the response from AC-XG. If the time is set longer, it will reduce the frequency for AC-XG to enter the Power Saving mode; this, for example, will have significant affects on the battery life for a notebook. A longer time value, about 60 seconds, is recommended for the desktop computer, and a smaller value of about 5 seconds is recommended for the notebook PC.


The current status (On, Standby, or Off) of AC-XG Audio Device is shown. "On" indicates that the AC-XG is currently in operation. "Standby" indicates that AC-XG is currently in the Power Saving mode. "Off" indicates either that the driver is not installed or for some reason the device is not ready for use. In this case, go to the device manager to check out the problem.


Configuring SPDIF Output, the IEC958-compliant digital output.

AC-XG can output PCM data of Wave and MIDI, data from Mic/Line in, and Dolby Digital data from soft DVD player. The digital output volume is fixed at a certain level and can not be changed via the Windows standard volume control. Changing the digital output volume needs to be done using an external amplifier.


Selecting this option will disable the digital output.


When this option is selected, only digital sources from Wave and MIDI will be turned on. The inputs from external devices such as Mic and Line In will be shut off. If Mic Echo is selected with this option checked, only the Mic echo effect will be output.


When this option is selected, all sound sources will be turned on. In recording, the recorded sound data will be output.


Enable/Disable the analog output. If the analog output is disabled, all analog outputs will become mute and only digital outputs are available.


Enable the analog output. The volumes of analog outputs can be adjusted via the Windows standard volume control.


Mute all analog outputs ignoring the settings on the Windows standard volume control.