axstream

Description

This program demonstrates 'software audio streaming'. Audio data are streamed from main memory into ARAM and played through the DSP using a looped AX voice. Note: Special handling is required for ADPCM-encoded audio data.

Because the SRC is not used in this demo, each demo sound was created using the base sample rate of 32KHz.

Coverage

AX initialization, setup, shutdown.
AX voice acquisition, runtime manipulation.
MIX initialization, setup, shutdown.
MIX runtime manipulation.

Operation Method

A Button	Plays looped 16-bit PCM stream.
B Button	Plays looped 8-bit PCM stream.
X Button	Plays looped ADPCM stream.
Y Button	Stops stream (to stop before starting another).
Start/Pause	Exits program.

This program does not display any video Instructions are printed to the serial output during runtime.

Required Data Files

//axdemo/stream/left.pcm16
//axdemo/stream/right.pcm16
//axdemo/stream/left.pcm8
//axdemo/stream/right.pcm8
//axdemo/stream/left.adpcm
//axdemo/stream/right.adpcm

Revision History

03/01/2006 Initial version.