The mastering chain that learns your mix first

Listen to it in action

Three renders, one transport. Press play and switch between them while the track runs: the playhead is kept, so you hear the same bar three ways. A louder file wins every blind A/B, which is why the middle button is the finished master turned back down to the level of the mix. That is the one that tells you what the chain actually did. The third is the same master at the loudness it was rendered to.

Three steps, in the order the faceplate reads

1. Step 1

   Input

   Every nonlinear stage is calibrated to peaks between -12 and -6 dBFS. Play the loudest section and turn INPUT TRIM until the meter reads SWEET, or press AUTO SET and it lands there for you.

2. Step 2

   Learn

   Press LEARN YOUR MIX on that same section and let it run for thirty seconds. The measurement is then frozen, so the correction holds for the whole song instead of chasing the arrangement.

3. Step 3

   Process

   One macro, 0 to 100, that engages the chain in order of what each correction costs the material. Free corrections first, then shape, then peaks, then loudness.

The ring marks what each zone costs you

One hundred is not the goal. Process 100 means the whole chain is engaged and driving to the target loudness; the right position is wherever the song sounds finished, and many songs stop at 25 or 50. The marks at 25, 50 and 75 are on the ring because those boundaries are the product being honest about cost.

Every correction, shown and auditionable

• Advanced view. A drawer under the faceplate showing the chain as a signal path, with a meter per stage and its depth knob directly beneath. Nine knobs voice the chain without moving Process.
• Matched bypass. Your dry mix at the processed signal's loudness, so the A/B does not lie. A finishing chain whose bypass is louder on one side is selling you volume.
• Hear changes. Delta monitoring: the output minus a latency-aligned copy of the input. What RSL Master added or removed, and nothing else.
• Not an AI product. Every stage is deterministic signal processing driven by measured numbers, and the drawer shows what each one is doing right now.

Specifications

Formats

AU, VST3, AAX, Standalone on macOS 11 or later; VST3, Standalone on Windows 10 or later (64-bit)

Hosts

Logic Pro, Pro Tools, Ableton Live, Cubase, Studio One, Reaper, Bitwig and FL Studio. AAX is what Pro Tools loads, on macOS

System

macOS 11 or later, or Windows 10 or later (64-bit)

Architecture

Universal 2, native on Apple Silicon and Intel

Channels

Stereo. A mono input is treated as dual mono with the width stages bypassed

Sample rates

44.1 kHz to 192 kHz

Latency

36 samples, plus 2 ms with Peak Limit on. Reported to the host

Loudness

Target from -24 to -5 LUFS. The factory profile sits at -7.5 LUFS

Ceiling

True peak limiter from -3.0 to -0.1 dBTP, -1.0 dBTP by default

Interface

1160 x 620 native, resizable between 45 and 100 percent

Placement

Last plugin on the master bus. Anything after it, dither included, stays with the DAW

Availability

$69, regular price $99. Available now, activated through RSL Hub on up to 4 computers