VCL-515

Name: VCL-515
Price: 59 USD
Author: Fuse Audio Labs

by Fuse Audio Labs · Compressor · 1960s push-pull tube limiter

Not rated yet

VCL-515 emulates a rare 1960s push-pull feedback tube limiter made for US broadcast use, with a soft-knee, vari-mu-style curve.

It has variable attack, release and sidechain filter, a mode switch to use only the tube saturation, and a mix stage, for $59.

Best for: Vocals, Mix Bus, Bass, Drum Bus. Genres: all genres.

Keywords: tube, 60s, bus processing, sidechain input, mixing, vari-mu, bass, broadcast, gentle, hardware emulation, mix bus, vocals, metering, smooth, acoustic guitar, drum bus, enhancement, full mix, inspired by, built-in mix knob, modern, parallel processing, single-band, thick, vintage, visual feedback.

What it does

VCL-515 emulates "a very rare and remarkable tube limiter from the 1960s" built for broadcast use. It combines soft vari-mu compression with tube saturation, and adds modern controls the original never had.

Soft-knee vari-mu: smooth compression with a gentle onset, and a tone the developer calls smooth and harmonically rich.
Input gain: the main control on the original unit; it sets how hard the tube circuit is driven.
Attack and release: both variable, which gives more control over timing than most vari-mu designs.
Sidechain filter: a variable high-pass on the detector, so low end can pass without pumping the compressor.
Limiter and Amplifier modes: switch compression off to use the tube stage purely as a saturator.
Mix stage: a parallel blend control and an output level.

The current version is 2.7.

Source: Fuse Audio Labs product page

When to use it

VCL-515 is the better pick when you want vintage tube compression but also want to set the timing yourself. Compared with the Teletronix LA-2A Leveler Collection it adds variable attack and release and a sidechain filter, and its Amplifier mode turns it into a saturator. Its sibling VCL-25A offers only switchable release times, so VCL-515 is the more flexible of the two Fuse vari-mu units. Compared with a clean digital design like FabFilter Pro-C 3, it gives up precision and metering for colour.

Best for: thickening vocals, bass and acoustic guitar, gentle bus compression, and tube saturation without compression.
Genres: any style, especially rock, indie, soul and acoustic music.
Look elsewhere if: you want a clean, transparent compressor (Pro-C 3) or aggressive FET-style punch (CLA-76).
Tip: raise the sidechain filter on the mix bus to keep the low end from driving the gain reduction.

What producers say

The one hands-on review found gave it full marks, praising its character and dual use as limiter and saturator.

HomeStudioToday rated it 5 out of 5 for looks, features, usability and value, and said the reviewer "didn't find a single flaw" over several days of use.
Praised: the aged interface with chickenhead knobs and an animated gain reduction meter, and the sidechain high-pass for keeping low end intact.
Usage tips: Limiter mode on the master bus for vintage compression character; Amplifier mode for saturation alone.

HomeStudioToday review

Where to buy

Fuse Audio Labs: $59

Tutorials and reviews

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