The below tips will guide you through the way to set up the audio device of your computer to be able to use AV Voice Changer Software with Sony ACID Music Studio.
REQUIREMENTS FOR THIS TUTORIAL:
* AV Voice Changer Software 7.0 (All editions: Basic, Gold, Diamond, compare all editions)
Open Voice Changer Software 7.0, choose the morphing effects for your voice, and make adjustments until you are satisfied with the output voice.
Note: You should have known 
how to change voice using Voice Morpher feature, and 
other voice changing tasks that Voice Changer Software can do.
- Start menu » Settings » Control panel » Click on 
Hardware and Sound.
- Click on 
Sound to go to the Audio Devices manager.
- Switch to the
 Recording tab (1), change the Sound Recording Default device to 
AV Virtual Audio Device (2) for recording devices.
- Click 
OK (3) to apply the new settings and close the Sound dialog box.

Fig. 1 - Change the Sound Recording Default device of Windows.
- Open 
Sony ACID Music Studio 7.0.- Select 
Options menu » 
Preferences.
- The 
Preferences dialog comes up. Select 
Audio Device (4) tab. Within the Audio device tab select
 Windows Classic Wave Driver (5) under the Audio device type. Select 
Realtek HD Audio output (6) for Default recording device (Figure below).
- Click 
Apply then 
OK to save the new settings and close the dialog.

Fig. 2 -Change the audio settings of Sony ACID Music Studio 7.0.
You now can start recording in 
Sony ACID Music Studio. The morphing settings for your voice should be now applied