Parallel Processing in Audio Production

Parallel Processing in Audio Production – Parallel processing is a powerful technique that allows audio engineers and producers to enhance and shape the sound of individual tracks and entire mixes. By blending processed and unprocessed audio signals, parallel processing provides greater control, flexibility, and creativity. In this article, we’ll delve into the world of parallel processing, covering everything from its basic principles to advanced applications.

What Is Parallel Processing?

At its core, parallel processing involves running two versions of the same audio signal in parallel: the dry (unprocessed) signal and the wet (processed) signal. By adjusting the mix between these two signals, you can achieve various sonic effects. Let’s explore some key aspects of parallel processing:

Setting Up Parallel Processing:
- Duplicate the original track (either by duplicating the track itself or using an aux send).
- Process the duplicated track differently (e.g., apply compression, distortion, or other effects).
- Blend the processed track with the original to achieve the desired sound.
Uses of Parallel Processing:
- Reverb and Delay: Adding reverb or delay in parallel can create a sense of space and depth without muddying the original sound.
- Compression: Parallel compression (also known as New York compression) enhances dynamics while preserving transients. It’s commonly used in mixing and mastering.
- Saturation and Distortion: Parallel saturation and distortion maintain transients while adding warmth and character.
- EQ and Harmonic Enhancement: Parallel EQ can emphasize specific frequency ranges without altering the original balance.
- Parallel Distortion: By blending distorted and clean signals, you can achieve unique textures.
Parallel Compression Techniques:
- Punch and Dynamics: Use parallel compression to add punch and control dynamics. Adjust the wet/dry mix to taste.
- Density without Sacrificing Transients: Parallel compression can make a mix sound fuller without squashing transients.
- Enhancing Tonal Balance: Apply parallel compression selectively to specific frequency bands to improve tonal balance.
Routing Considerations:
- Set up three channels: Pre-Process (for corrective EQ), Parallel Compression (for processing), and Post Process (for post-EQ, limiting, etc.).
- Ensure proper latency compensation to avoid phase issues.

The History of Parallel Processing

Parallel processing has a rich history in audio production. Here are some notable milestones:

New York Style Compression: The term “New York Style” compression originated from mix engineers in New York City who pioneered parallel compression techniques. They used it to enhance drum tracks, vocals, and overall mix energy.
Studio Legends: Legendary engineers like Bob Clearmountain and Chris Lord-Alge popularized parallel processing. Clearmountain’s use of parallel compression on drums and vocals became iconic.
Evolution of Plug-Ins: As digital audio workstations (DAWs) evolved, plug-ins began incorporating wet/dry controls, making parallel processing more accessible. Modern tools like Ozone and Neutron offer built-in parallel processing capabilities.

In summary, parallel processing is a timeless treasure that empowers producers to sculpt sound with precision. Whether you’re shaping drums, vocals, or entire mixes, understanding parallel processing opens up a world of creative possibilities.

Remember, the key to successful parallel processing lies in attentive listening and experimentation. So go forth, blend those signals, and create magic in your mixes!