Chapter 7. Real-Time Signal Processing
In this chapter, we will cover the following topics:
- Configuring the audio codec
- How to play prerecorded audio
- Designing a low-pass digital filter
- How to make an audio tone control
Introduction
In the last chapter, we used the audio codec's beep generator to play a tune, but if you looked at the codec manufacturer's data sheet, you must have noticed that the device can do much more. Audio signals can be recorded by connecting a microphone to the evaluation board's stereo analog audio input, and the signal can be sampled using the audio codec's on-chip ADC. Digital audio can be played by sending digital samples to the codec, and the left and right speakers can be driven by the output of an on-chip DAC. A dedicated ...
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