Audio I/O and Waveform Generation
Audio Toolbox™ enables real-time audio input and output. Using the enhanced
functionality of Audio Toolbox audio I/O, you can interact with the low-latency ASIO™ driver on Windows®, selectively map to and from device channels, and control your
device bit depth. Use the audiostreamer object for a flexible I/O interface for playing
and recording streaming audio. To manage a database of audio files, use
audioDatastore.
You can also generate tunable periodic waveforms to create test signals, control signals, and your own unique sounds.
Apps
| Audio Viewer | View and play audio signals (Since R2024a) |
Functions
Blocks
| Audio Device Reader | Record from sound card |
| Audio Device Writer | Play to sound card |
| From Multimedia File | Stream from multimedia file |
| To Multimedia File | Stream video frames and audio samples to multimedia file |
| Wavetable Synthesizer | Generate periodic signal from single-cycle waveforms |
| Audio Oscillator | Generate sine, square, and sawtooth waveforms |
| Colored Noise | Generate colored noise signal |
Topics
- Sample- and Frame-Based Concepts
Explore basic signal concepts in the context of a Simulink® model. Learn more about sample-based processing and frame-based processing.
- Real-Time Audio in MATLAB
Create a script to process and analyze real-time audio signals.
- Audio I/O: Buffering, Latency, and Throughput
Learn key terminology and basic techniques for optimizing stream processing algorithms.
- Plot Large Audio Files
Plot large audio files in MATLAB using the audio envelope.
Featured Examples
Create an App to Play and Visualize Audio Files
Create an app in App Designer to play and visualize audio files.
Measure Audio Latency
Measure the latency of an audio device. This example uses audiostreamer to measure latency by cross-correlation, by playing and recording a brief sine sweep.
Measure Performance of Streaming Real-Time Audio Algorithms
Presents a utility that can be used to analyze the timing performance of signal processing algorithms designed for real-time streaming applications.
THD+N Measurement with Tone-Tracking
Measure total harmonic distortion and noise level of audio input and output devices.
Measure Impulse Response of an Audio System
The impulse response (IR) is an important tool for characterizing or representing a linear time-invariant (LTI) system. The impulseResponseMeasurer enables you to measure and capture the impulse response of audio systems, including:
Measure the Frequency Response of an Audio Device
The frequency response is an important tool for characterizing the fidelity of an audio device or component.
Simulation of a Plucked String
Simulate a plucked string using digital waveguide synthesis.
