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. Your application may 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.

Note: This demo lets your application 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.
• Acquiring and freeing voices.
• Handling 'dropped' voices.
• Toggling the AX compressor.
• Managing sample data with the AX Sound Pipeline.
• Snooping the output of the DSP using the DEMO library (for the clip-detectors)

Operation Method

In the "AX Compressor Demo" window:

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

03/01/2006 Initial version.