Aligning for bad inverts
- "Utagoe bruteforces alignment every few ms or so to make sure it's aligned in the case that you're trying to get the instrumental of a song that was on [e.g.] vinyl."
[The previous] UVR's align tool is handy just for digital recordings… [so those] which don't suffer from that [issue] at all."
Utagoe will not fix fluctuating speed issues, only the constant ones.
- Anjok already "cracked" how that specific Utagoe feature works, and introduced it to UVR.
“Updated "Align Tool" [is] to align inputs with timing variations, like Utagoe.”
Sometimes it can give even better results than utagoe e.g. when inverting “a full track and instrumental while automatically matching the waveform”
- “Some users had good results with Auto Align Post 2 plugin to resync tracks before inverting them.”
- For problematic inverts, you can also try out azimuth correction in e.g. iZotope RX.
Notes:
1) Make sure your stems align in DAW, check across the whole song
2) If stems become suddenly misaligned in certain parts of song, use utagoe or align inputs in UVR>Tools
3) Make sure you don't use separated stems from service like MVSep with volume normalized, so the output will be quieter than the OG mixture/input file (or use 32-bit float output for premium)
4) Make sure you don't use lossy separation output - it might start in a different place vs mixture
5) Make sure one of your stems doesn't have a different sample rate
6) Some instrumentals/acapellas derive from different mixing/mastering session or weren't properly exported (e.g. without stems sidechaining or dedicated option but instead e.g. with just stems soloed) so it won't invert with the OG song, or there might be some discrepancies in various places of the song
7) The sums of stems of multistem models like deux or SW won't invert with the OG mixture/input file (e.g. splifft by undef13 compensates fixes it at least for the SW)
Declicking vocals
- BS-Rofomer vocal model (iirc; “Can also fix hard clicks in vocals. It is even better than RX in this, but still there is a tiny wave fade residue in some cases”)
- Kim vocal first and then separate with instrumental model (e.g. HQ_3 or 4). You might want to perform additional separation steps to clean up the vocal from instrumental residues first, and invert it manually to get cleaner instrumental to separate with instrumental model to get rid of vocal residues
Removing metronome (e.g. from a mixture or vocals)
- Use a good instrumental model so you will be left with metronome + vocals in one stem, then use a drums model - “Then the drum trick worked better but still not very good, a regular extraction worked better this time though!” - brianghost
Removing bleeding of hi-hats in vocals
- Kim Mel-Roformer model
- Use MelBand RoFormer v2 on MVSEP (e.g. after using MDX23C Inst HQ)
Bleeding in other stems
- RipX Stem cleanup feature (possibly)
- SpectraLayers 10 (eliminates lots of bleeding and noise from MDX23 Colab ensembles)
"You debleed the layer to debleed from using the debleed source. Results vary. Usually it's better to debleed using Unmix and then moving the bleed to where it belongs" Sam Hocking
Bleeding of claps in vocals
- Reverse polarity and/or remove DC offset of the input file
- KaraFan (for general drum artefacts, but it doesn’t work well for inverts, try out modded preset 5 here)
- Remove drums with e.g. demucs_ft first, then separate the drumless mixture from inversion, consider slowing down your input without stretching to 0.75.
- Ensemble of old VR models (search the names here for UVR names equivalents)
- Kim Vocal 2 (but it has a cutoff and creates a lot of noise in the output)
- Denoise model with 0.1-0.2 aggressiveness
- possibly de-crowd models
Bleeding of guitars/winds/synths in vocals
- BVE (Karaoke) models
Fixing overlapped/misrecognized stems
- Spectralayer's 9/+ Cast & Mold
Fixing low-end rumble
- Spectral Editing:
a) RX Editor’s brush (video by Bas)
b) Audacity (image) - “you can, just barely”
Potential alternatives for spectral painting:
Free: ISSE, Ampter, Filter-Artist, AudioPaint
Paid: RipX, SpectraLayers, Melodyne, prob. Revoice Pro 5, FluffyAudio FFT
Cleaning the white noise/sizzle from vocals
(from e.g. Roformer models)
- big beta 5e (if you have vocals “really great” - gilliaan)
- MDX23C model (e.g. the latest on MVSEP or HQ in UVR)
- aufr33 denoise model (generally meant also for white noise; doesn’t always work, can pick vocals - gustownis, “when it works its one of the best ones” - cyclorana)
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Debleeding guide by Bas Curtis (other methods, e.g. Audacity)
Denoising and dereverberation/apps later below.
See also “Vinyl noise/white noise” from the end of the list.
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