MixMasterAIFree R&B Mastering Online. Warm, Smooth, Vocal-Forward.
R&B mastering needs warmth in the low-mids, silky smooth compression, and vocal presence that keeps the lead performance front and center. MixMasterAI's R&B preset delivers that polished, intimate sound in one free upload.
The challenge
What makes R&B different to master
Warm, smooth low-mid foundation
R&B's emotional power comes from warmth in the 200-500 Hz range. This warmth needs to be rich and present without becoming muddy or obscuring the vocal, which is the most demanding balance in R&B mastering.
Vocal presence and silk in the high-mids
R&B vocals depend on silky, present highs with controlled sibilance. A subtle presence boost at 3-5 kHz and a careful de-esser keep the vocal smooth and forward without becoming sharp.
Wide, enveloping stereo image
R&B mixes often feature wide reverb tails, lush pads, and background vocal harmonies that need room to breathe. A generous stereo image makes the listening experience immersive without pushing the lead vocal off center.
The processing
How MixMasterAI handles R&B
Low-mid warmth EQ without mud buildup
MixMasterAI's R&B preset boosts 250-400 Hz by 1-2 dB for warmth, then applies a narrow cut at 350 Hz to remove any box buildup, preserving the smooth, rich low-mid texture that defines the genre.
Smooth optical compression for natural dynamics
An optical-style compression emulation at 2:1 ratio applies a smooth, musical gain reduction that sounds like it breathes with the vocal, rather than the brick-wall effect of harder compressors.
Stereo widening preserves vocal center
Mid-side processing widens the side content (reverbs, pads, harmonies) while the lead vocal and bass remain tight in the center, creating an expansive sound that keeps focus on the performance.
Recommended settings
Use R&B genre and Fire character for the best results on R&B tracks.
These settings are pre-selected when you visit MixMasterAI, or you can choose them manually in the genre and character pickers.
Open MixMasterAI with R&B presetFAQ
Questions about mastering R&B
Can I master R&B songs free online?
Yes. MixMasterAI is free, no account, no watermark. Upload your R&B mix, select the R&B preset and Fire character, choose your streaming platform, and download a polished master in under 60 seconds.
What LUFS should R&B be mastered to?
Spotify targets -14 LUFS and Apple Music targets -16 LUFS. R&B benefits from slightly less aggressive limiting than pop or hip-hop, so the natural dynamics and vocal expressiveness are preserved. -14 LUFS is the standard target.
How do I get a warm R&B sound without mud in the master?
The key is a narrow cut in the 300-400 Hz range to remove box buildup, combined with a gentle boost at 200-250 Hz for warmth. MixMasterAI's R&B preset applies this balance automatically.
Should I use Fire or Clarity for R&B mastering?
Use Fire for modern R&B with an energetic, slightly compressed sound that competes in mainstream playlists. Use Clarity for classic-influenced R&B, acoustic-heavy arrangements, or soulful ballads where natural dynamics and transparency matter more.
R&B-ready master in 60 seconds. Free.
No account. No watermark. No cost. 24-bit WAV and 320 kbps MP3 download. Works on any device.
Master My R&B Track Free