|  | This step is no longer required if you are using the build  9.5.21 or newer. Since  the release of Voice Changer Software Diamond 9.5.21, Virtual  Audio  Driver (VAD) Mode is the default and primary working method. This change   is guaranteed not to impact software performance and user experience  quality.  | 
| 
 |  | To connect Voice Changer Software Diamond with  another VoIP application: Change the program’s microphone input to VAD. » Details  in Step 2 below. | 
| 
 |  | To process a list of ready audio files: Take  advantage of the premium feature File Morpher. » Details in this tutorial. | 
- On VCSD 9.5 main panel, click Preferences to open the VCS Preferences window.

In the Preferences window, we will change Hook mode to Virtual Audio Driver mode.
- Check Virtual driver Mode (1).
- Click the OK button (2) to apply the new settings and close the Preferences window.
 - Run Yahoo Messenger 11, login to your account.
- Click Messenger (1)>> Preferences (2) or (Ctrl +Shift+P) to open Preferences dialog box.

- In the Yahoo! Messenger Preferences dialog box, choose Video & Voice (3).
- In the Microphone section, choose Microphone (Avsoft Virtual Audio Device) for your microphone (4).

- Click OK (5). 
From now on, VCS Virtual Audio Driver will be the main audio driver recognized by Yahoo Messenger 11.
- Go to VCSD 9.5 main panel, choose the morphing effects and  make adjustments until you are satisfied with the vocal output. There  are several ways to change your voice, including voice morphing and  audio effects.
- You should read this guide for more in-depth information: How to use Voice Morpher in VCSD 9.5.
- Remember to check out our Add-on store to download new and cool audio effect packs, updated regularly.
Note: Remember to choose the packs used for VCSD 9.5 only. The other ones which applied for other products cannot be used for VCSD 9.5. 
Start voice conversation with Yahoo Messenger 11. The morphed voice will be applied automatically.
Note: While VCSD 9.5's Virtual Audio Driver is being set as the audio driver for Yahoo Messenger, do NOT turn off VCSD 9.5 when doing voice chat. If you don’t want to use VCSD 9.5, change the audio settings of Y!M11 back to normal audio source.