Slowed + Reverb Maker

How the slowed + reverb sound is built

Two processes account for essentially the whole aesthetic. The first is a tempo reduction, usually to somewhere between 75% and 90% of the original. That does more than make the track longer: it stretches every transient, so a snare that was a sharp crack becomes a softer thump, and it widens the gaps between events, which is what makes the arrangement feel spacious rather than merely slow.

The second is a long reverb, and it exists to fill exactly those gaps. The reverb here is a Schroeder network — four parallel comb filters feeding two series all-pass filters, with the right channel detuned slightly against the left so the tail spreads across the stereo image instead of sitting in the middle. Decay time controls how long the tail rings, damping rolls the top off it so it sits behind the music rather than on top, and pre-delay holds the tail back a few milliseconds so the dry attack still reads clearly.

The order matters. Stretching first and reverberating second means the reverb responds to the slowed material, which is why it sounds like a room the slowed track was actually played in. Reverberating first and then stretching would smear the tail itself and sound obviously processed.

Finding the right settings

Start at 85% speed with a hall reverb around 30% wet. That combination is close to what most well-received slowed edits use, and it stays musical on almost any source. From there, the two things worth adjusting are the speed and the wet mix, in that order.

Dense, busy productions need less reverb than sparse ones — there is already energy filling the space, and adding a long tail on top just turns the mix to mud. Sparse ballads, piano pieces and anything with long held notes take a much bigger tail happily. If the result sounds washed out, cut the mix before you cut the decay: it is almost always too much wet signal rather than too long a tail.

• 85% speed, hall reverb, 30% mix — the reliable starting point
• 75% speed with a cathedral tail for the heaviest version of the style
• Keep pitch at 0 for a modern slowdown, -1 to -2 semitones for the tape sound
• Busy mixes need less wet signal than sparse ones

Finishing the track

Reverb-heavy audio usually comes out quieter than it went in, because the peak protection has to make room for the tail. Running the export through the Volume Normalizer at -14 LUFS brings it back to a level that matches everything else on a playlist without clipping.

If you want the vocal to sit further forward — a common request for this style — separate it first with the Vocal Remover, apply the slowdown and reverb to the instrumental only, and blend the dry vocal back over the top. It takes an extra step but it is the difference between a wash and a mix.

Related tools

• Tempo & Pitch ChangerChange speed and key independently, without the chipmunk effect.
• Vocal Remover & Karaoke MakerSplit a stereo mix into an instrumental and an isolated vocal.
• Audio ConverterConvert between MP3 and WAV, change sample rate and channels.