Introduction
Compression is an essential tool in audio production that helps control the dynamic range of a track. With compression, quiet parts of a track can be boosted, and loud parts can be lowered to create a more balanced overall sound. However, there are two main compression techniques, parallel compression and serial compression. In this blog post, we'll explore both techniques and their differences.
Serial Compression
Serial compression is the most common method of compression. In this technique, the audio signal passes through one compressor before going out as output. Serial compression allows for more control over the audio signal's dynamics, but can sometimes make the audio feel compressed and flat.
Parallel Compression
Parallel compression is a technique that allows for more control over the audio signal's dynamics while keeping the original audio signal intact. This is achieved by duplicating the audio signal and then processing the duplicate with a compressor, while the original audio signal remains uncompressed. Finally, the two signals are mixed to create the final output. Parallel compression helps to retain the dynamic range of the track while still making the quieter parts louder.
Comparison
While serial compression offers more control over the audio signal, parallel compression preserves the dynamic range while still compressing the audio signal. Serial compression can result in a "squashed" sound, while parallel compression can result in a fuller, more balanced sound.
When it comes to the amount of compression, parallel compression typically requires less compression than serial compression. With parallel compression, the uncompressed original audio signal still contributes to the final output, meaning less processing is required to achieve the same level of compression.
In terms of CPU usage, parallel compression can be more demanding as it requires duplicating the audio signal. However, most modern audio software has optimized parallel compression to minimize its effect on CPU usage.
Conclusion
Both parallel and serial compression offer unique styles of compression that can be useful in audio production. Ultimately, it comes down to the type of audio signal you're working with and the desired final output. Experimenting with both techniques can help you find the best approach for your audio production needs.