Playback audio samples from an algorithm to an output audio device
SoC Blockset / Peripherals
The Audio Playback block simulates behavior of the driver code that plays audio to an audio output, such as a speaker, on a hardware board. The output of this block must be connected to an Audio Playback Interface block that simulates a physical audio device on the hardware board. Place this block inside a task and connect to an algorithm to output a frame of audio samples each time the task executes. For more information on tasks, see Timer-Driven Task and Event-Driven Tasks.
data— Audio data frame
Audio data frame to be sent to an audio playback device, specified as an M-element for single channel audio or as an M-by-C matrix for multi-channel audio. C is specified by the Number of channels parameter.
Number of channels— Number of channels
2(default) | positive scalar
Specify the number of audio channels, C, in each audio data sample.
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When deployed to a supported hardware board, this block uses the advanced Linux sound architecture (ALSA) driver framework to send audio to an audio output device. To specify the audio output device, use the Peripheral Configuration tool. Similarly, to specify the event that triggers the task, use the Task Mapping tool. For more information on the ALSA driver framework, see the Advanced Linux Sound Architecture website.