Audio Compression : The Complete Course

Explore dynamics as the difference between loud and soft parts, and understand dynamic range—the peaks and dips of a signal—before diving into compression.

A compressor reduces the dynamic range to control dynamics and even out volume, bringing out details and gluing the elements for a fuller, punchier mix.

Learn how a compressor uses threshold to start processing a signal and ratio to control how much compression is applied, shaping dynamics in decibels.

Understand how attack and release control compressor behavior, fast or slow settings that hit the threshold, preserve transients or yield smoother results, and align release with tempo.

Explore practical compression examples on drums, guitar, bass, and vocals, adjusting threshold, ratio, attack, release, and make-up gain to shape dynamics and punch in mixes.

Explore the main compressor types—tube, optical, FET, and VCA—explaining their character, attack and release traits, and how to choose for vocals, drums, or mix buses.

Explore fixed-control compressors, where threshold is preset and input level triggers compression; adjust output gain, and note devices like the a-76 style unit with no ratio, attack, or release.

Apply sidechain compression to duck the main signal when the kick triggers the sidechain, creating a pumping effect; adjust threshold, ratio, attack, and release to get the sound you want.

Explore multiband compression, using separate compressors for lows, mids, and highs to sculpt dynamics, achieve transparency in mastering, and control thick lows without affecting treble.

Learn how limiters cap peaks at a set threshold with a 100:1 ratio, raise the average level, reduce dynamic range, and manage hard or soft clipping.

Parallel compression blends an untreated signal with a heavily compressed copy to thicken drums and vocals without sounding overcompressed, using a mix knob to balance dry and compressed signals.

Apply compression in series by chaining multiple compressors to a track, achieving smoother, more natural tones with smaller per‑compressor gain reductions and unique sonic character, especially on vocals and bass.

Glue compression tightens grouped tracks by sending them to a bus and applying a single compressor, often a VCA, with slow attack and fast release to create a cohesive mix.

Compress vocals in series to control dynamics for a clear, natural mix, using 2–5 dB per compressor and 2:1–4:1 ratios, with parallel compression to preserve transients and tone.

Learn to preserve drum transients while shaping punch and glue through slow attack and fast release, using bus and parallel compression for a thick, punchy drum sound.

Learn how to shape bass dynamics with compression to add weight, control range, and keep the low end clear, using attack and release, bus compression, sidechain techniques, and parallel compression.

Apply compression to guitars, synths, pianos, and other instruments to control dynamics, improve mix balance, and add tonal color using series, multi-band, or glue compression.