compressor

Description

This demo illustrates the use of the AX compressor.

Each test plays a low-frequency hum, then repeatedly plays a sound effect to induce clipping. You can toggle the compressor on and off and compare the incidence of clipping artifacts.

Each test also provides a "clip detector," which displays an alert whenever clipping is detected on the right or left output channels of the DSP.

Individual sound effects may also be started and stopped manually from the main menu.

Be aware that this demo allows you to toggle the compressor at will. However, you should change the state of the compressor only when audio is silent to prevent clicking or popping artifacts.

Coverage

• AX initialization
• Getting and freeing voices.
• Handling "depopped" voices.
• Toggling the AX compressor
• Managing sample data with the AX Sound Pipeline
• Checking the DSP output using the DEMO library (for the clip detector)

Using the Demo

In the AX Compressor Demo window:

• Use the +Control Pad or the Control Stick to move the menu selection up and down.
• Use the A Button to select a menu item.

In the Compressor Test windows:

• Use the A Button to toggle the compressor.
• Use the B Button to exit.

Required Data Files

• //axdemo/compressor/comp_sp.spd
• //axdemo/compressor/comp_sp.spt

Revision History

2008/08/28 Revised terminology.
2006/03/01 Initial version.

CONFIDENTIAL