jdsherbert/audio-delay

Simple C++ implementation of a basic Delay technique. Includes an example usage case.

Audio: Delay

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Overview

Digital Signal Processing (DSP) delay is a fundamental technique employed by audio engineers to manipulate the timing of audio signals in the digital domain. Delays introduce a temporal offset between the original and processed signals, enabling the creation of various effects, spatial enhancements, and artistic sound design. This repository provides a basic implementation of a DSP delay in C++. The purpose is to illustrate the core concepts of digital audio delay and how it can be integrated into audio processing workflows.

What is DSP Delay?

DSP delay involves introducing a time delay to an audio signal in the digital domain. This delay can be implemented as a simple time offset or as a more complex effect with feedback, modulation, and filtering. Audio engineers leverage DSP delays for a myriad of purposes, ranging from basic echo effects to sophisticated spatial enhancements.

Key Concepts

- Delay Time

The duration between the original sound and its delayed version. Short delay times create flanger or chorus effects, while longer delays contribute to echo and reverb.

- Feedback

The portion of the delayed signal that is fed back into the delay line. Feedback is crucial for creating sustain, decay, or infinite reverberation in delay-based effects.

- Modulation and Filtering

Dynamically varying the delay time introduces shifting effects like chorus or flanger. Applying filters to the delayed signal can alter its frequency content.

- Haas Effect

Uses a short delay between two identical signals to create a perception of localization or spaciousness. Ideal for widening the stereo image without introducing noticeable echo.

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