The WAV in your Ohm Library is not a finished file yet. It is a clean, full-quality recording — but to master a DJ mix for distribution, it needs loudness treatment that makes it survive streaming normalisation without sounding gutted, sit correctly on a podcast feed, and hold up next to other sets on SoundCloud. Done wrong, mastering destroys transitions and pumps through every quiet passage in a two-hour mix. Done right, you hear nothing except the set sounding better.

Why your recorded mix needs mastering before you publish

Streaming platforms measure the loudness of uploaded files and normalise playback to a target level. Spotify’s target is -14 LUFS integrated. A file that arrives louder gets turned down. A file that arrives quieter gets pushed up, and that push exposes noise floor, widens the stereo image unnaturally, and makes a quiet mix sound thin.

Unmastered recordings don’t land at the right integrated loudness. And over 90 minutes recorded across varying conditions, the problem compounds: the opening 40 minutes may sit at a completely different average loudness than the closing peak. One static gain adjustment cannot address the whole file.

Mastering solves this. The question is which tool to use.

Why standard mastering tools fail on DJ mixes

LANDR, iZotope Ozone, and every limiter plugin in a standard DAW mastering chain were designed for songs: a few minutes of material with consistent dynamics and a predictable structure. React to the signal — that’s the basic model. A loudness peak arrives, the compressor engages.

Apply that to a two-hour continuous mix and you get pumping. A brickwall limiter reading the whole file finds its loudest section and constrains everything to fit inside it, then rides audibly through every low-energy passage in the set. The alternative of processing the mix in segments breaks at every transition. There is no clean handoff between the sections and the seams are audible.

The tool needs to know what the whole file looks like before touching any of it. Standard mastering tools do not do this.

What SetMaster Pro does differently

SetMaster Pro is built for DJ mixes and continuous recordings. Before any gain change is applied, the tool maps the loudness contour of the entire mix — the level decision at minute 47 is already informed by what the file looks like at minute 90. A standard compressor only knows what already passed.

The auto-gain stage is what SetMaster Pro calls the “Invisible Hand Leveler.” The Digital DJ Tips review from August 2026 noted that its gain window spans three seconds — long enough to track level shifts across transitions without generating the exaggerated gain rides a track compressor produces on transients. The result rides level continuously without audible pumping.

The five-stage chain runs in fixed sequence: loudness mapping, gain control, multi-band compression, EQ, and a brickwall limiter with lookahead. That limiter holds a true-peak ceiling of -1 dBFS. The sequence matters. Running first, the loudness map gives every subsequent stage a complete picture of the file.

The tool is cloud-based — SetMaster Pro’s servers do the work. No download, no installation, no CPU load on your machine. Most files process in 1 to 3 minutes. Deterministic DSP, not AI.

The four profiles and when to use each

SetMaster Pro offers four mastering profiles. Choosing the right one depends on where the set is going.

  • Streaming/Radio targets -14 to -12 LUFS integrated — the same range Spotify normalises to, and SetMaster Pro’s recommended starting point for Apple Music and Mixcloud uploads as well. This is the default choice for any mix heading to a streaming or distribution platform. It is also the only profile available on the free tier.
  • Club/Festival is built for PA translation, not platform compliance. It applies aggressive limiting and a frequency shape that adds weight in the lows and air in the highs. Bass below 50 Hz is narrowed to mono so it holds tight on large rigs. No LUFS target is published for this profile — club systems do not normalise playback, and the goal is maximum perceived loudness on big speakers.
  • Podcast/Radio Show targets -16 LUFS. Podcast clients and internet radio stations typically normalise closer to this level, and a -16 target also accommodates hosts that apply their own limiting on top of your file.
  • Warm/Analogue is the odd one out. No loudness target, no platform compliance goal — it applies analogue saturation (tape and tube stages) to push the result toward the warmth and depth of a vinyl source. Use it for archive copies or any set where character matters more than hitting a streaming number.

The Ohm to SetMaster Pro workflow, step by step

SetMaster Pro is web-only — no iOS app — so this is a desktop browser workflow. Move the WAV from your iPhone to a computer before you start.

  1. Open Ohm and go to your Library. Find the set you want to master.
  2. Share the WAV from Ohm to your laptop or desktop. AirDrop is the fastest path. Files app sync or a USB cable both work.
  3. Open setmasterpro.com in a browser. No account is required to start. The free tier includes two masters in your first month and one per month after that. If you need a single master outside that allowance, pay-as-you-go is £2.99 per mix.
  4. Upload your WAV. The upload accepts most common audio formats: WAV, AIFF, FLAC, OGG, MP3, and M4A. Ohm exports WAV and SetMaster Pro recommends lossless source files for the best result. These are aligned and no format conversion is needed.
  5. Select your profile. Streaming/Radio for SoundCloud, Mixcloud, or any streaming platform. Club/Festival for a club set you are distributing for PA use. Podcast/Radio Show for podcast feed submission.
  6. Start processing. The loudness map reads the whole file before anything is applied. The browser can stay open in the background. Expect 1 to 3 minutes.
  7. Download the mastered file. WAV download is available on Pro (£4.99/month) and Studio tiers. The free tier delivers MP3 at 320 kbps. Once the master is ready, you have a 24-hour download window. SetMaster Pro removes the file from their servers when it closes — there is no recovery after it expires.
  8. Publish. Pro and Studio tiers include direct publish to SoundCloud and Mixcloud from within the tool. Otherwise, take the downloaded file to your platform of choice.

What SetMaster Pro cannot fix

SetMaster Pro is a finishing tool. It levels and limits a well-recorded mix. It does not repair a compromised source.

If the recording contains digital clipping — peaks that hit 0 dBFS during capture — the distortion is baked into the WAV before SetMaster Pro receives it. The limiter will process the clipped signal, not undo it. The result will be louder clipping.

Poor gain structure upstream produces the same problem in a different form. A mix recorded with levels running too hot produces a saturated, dynamically compressed file that no loudness tool can recover. Ohm captures the post-fader signal, which means it receives the same signal the dance floor hears. If the mixer’s output was hitting the ceiling before Ohm recorded it, that ceiling is already in the source file. The fix happens at the mixer, not in the mastering tool. The gain structure guide covers exactly this.

Mix structure problems — a harsh transition, a beatmatch that loses time, a jarring energy drop — are not mastering problems. SetMaster Pro adjusts loudness and applies limiting. It does not edit audio.

For most sets recorded with correct gain staging, the Streaming/Radio profile at default settings will do the job. If the mastered result still sounds thinner or quieter than your reference mixes on a given platform, the problem is in the source recording’s dynamic range, not the mastering step. Fix it before the next session, not after.