Advanced Audio Adaptation Framework Overview

Purpose

A3F provides the interface between the Symbian platform and the audio processing hardware for all audio functionality. A3F is responsible for:

• Providing access to all audio resources

• Configuring audio hardware

• Playing and recording audio data

• Playing tones.

Required background

In order to use A3F, you should be familiar with DevSound.

Architectural relationships

A3F is a component in the Sound Device collection. A3F provides a new standardised implementation of DevSound which is configured by default from Symbian OS v9.5 onwards. A3F interacts with a specially customised DevSound (configured as optional).

Shown below is a representation of how A3F interacts with DevSound and other components:

Figure 1. A3F and related components

Library summary

A3F includes the following libraries:

Typical uses

You can use A3F to play tones, play audio and record audio. The following list describes some of the steps involved in playing and recording audio:

• Create a new audio context

• Apply changes made to the audio processing units in a context

• Configure hardware devices, for example, set sampling rate and channels to use.

• Play buffered audio data

• Record audio data to buffers

• Pause audio processing

• Stop playing audio

• Stop recording audio.

See also

DevSound Overview

Multimedia Framework Overview