You split a mix into stems and the vocal still has a ghost of the drums behind it. Search for a fix and you will find plug-ins that promise to “remove bleed”. Most of them were built for a different problem with the same name: cymbals leaking into a snare microphone on a live drum kit.
This page compares the tools by what each vendor says it is for. We make de-leak-rt, one of the tools below, so we state its limits as plainly as the others’.
The short answer
Match the tool to where the leak comes from. If a separation model left one instrument in another’s stem, use a tool built for separated stems; if cymbals or other microphones leak into a close mic on a live kit, use a drum-spill tool or a general de-bleed module. None of the vendor pages we read says its tool is built for stems from an AI separation model, so try any of them on one short phrase and listen to what it removes.
Two problems with one name
| Situation | What leaks | Where it comes from | Tool family |
|---|---|---|---|
| A vocal stem from a separator has drums behind it | Another instrument, left in the stem | The separation model could not split overlapping content | A bleed gate built for separated stems, re-separating with another model, or a manual edit |
| A snare mic picks up the hi-hat and cymbals on a live kit | Cymbal energy in close mics | Microphones sharing one room | A drum gate or spill remover |
| A click track from headphones shows up in a vocal mic | One recorded signal in another channel | Recording setup | A de-bleed module that can learn the leaking source |
| A stem sounds watery or metallic but no other instrument is audible | Nothing foreign: this is residue, not bleed | Generation or separation damage | An artifact remover; see what an audio artifact is |
How separation bleed gets there
A separation model assigns each part of the spectrum to a stem. Where instruments share frequencies, reverb or backing vocals, the split is not clean, and the remainder shows up as bleed. Dense accompaniment, reverb and backing vocals can make wanted and unwanted content inseparable, so some bleed cannot be removed completely. Our guide to removing instrument bleed from a vocal stem shows how to recognise it.
If your stems come from Demucs, note that the project’s repository was archived on January 1, 2025 and its README says it is no longer maintained; the README points to a fork that handles only important bug fixes. Do not wait for upstream model improvements.
The fix for separated stems: a bleed gate
de-leak-rt is a real-time plug-in for stems from Demucs and htdemucs. Its product page describes a per-frame classifier that finds inter-stem bleed and a multiband gain that removes it. It ships as VST3 and CLAP for macOS 11+ and Windows 10 (64-bit), reports a fixed latency of about 93 ms at 44.1 kHz that your host compensates, and costs $99 once with a 14-day trial.
A workable order from our own guide: remove obvious clicks and empty regions first, reduce the bleed gently and listen to phrase endings, check the removed signal and back off if whole words appear in it, then apply normal vocal processing. If the vocal then sounds watery or metallic, treat that residue afterwards with an artifact remover; reduce the foreign instrument first.
Tools compared (as of October 20, 2026)
The table records what each vendor page states, read on the date above. “Not stated” means the page we read did not say. We have not tested the third-party tools on AI-separated stems.
| Tool | What the vendor says it is for | Formats and systems | Cost and trial | Latency |
|---|---|---|---|---|
| de-leak-rt (Intrect) | Bleed between stems from Demucs and htdemucs separations | VST3, CLAP; macOS 11+ (Universal), Windows 10 (64-bit); no Audio Unit | $99 once; 14-day trial | About 93 ms at 44.1 kHz, fixed and reported to the host |
| iZotope RX De-bleed | Leakage of one signal into another; the rebuilt version works “without needing a reference track”, and Classic mode uses a reference for headphone bleed; the page also mentions isolating competing instruments and multi-mic’d drum kits | Not stated on the feature page; a real-time plug-in version is listed | Included in RX Standard and Advanced, not Elements; price not stated on the page | Not stated |
| Acon Digital DeBleed:Drums | “Unwanted mic spill from drum recordings in real-time”, using neural-network separation of kit elements | Windows: VST, VST3, AAX; macOS: AU, VST, VST3, AAX; Windows 10/11, macOS 10.13+ | US$99 once; free trial, length not stated | Not stated |
| Black Salt Audio Silencer | A drum gate that removes high-frequency cymbal leakage from other drum tracks in live-recorded drums | AAX, AU, VST3 (64-bit); macOS 10.15+, Windows 10+ | $59 once; 14-day trial | Not stated (the page mentions lookahead) |
Waves Clarity Vx is often suggested for this problem. Its product description covers noise removal for vocals and voice and does not mention bleed, so we left it out.
Where de-leak-rt is the wrong choice
- Logic Pro or GarageBand: de-leak-rt ships VST3 and CLAP only, and those hosts load Audio Units only.
- Live monitoring: about 93 ms of reported latency suits mixing, not playing.
- Microphone spill on a recorded drum kit: it is built for separated stems; use a drum-spill tool.
- One short phrase with two obvious hits: clip gain or spectral repair may be faster and more transparent.
How to test any of these fairly
- Pick 20 to 30 seconds with audible bleed and a quiet passage.
- Match loudness before you compare.
- Solo the removed signal. It should be the foreign instrument; if whole words or drum attacks you want are in it, back off.
- Listen to phrase endings and consonants. Gates often cut tails and breaths first.
- Check a dense passage and a sparse one before you trust a setting.
Try the stem bleed gate on your own stem
de-leak-rt has a 14-day trial for macOS and Windows hosts that load VST3 or CLAP.
Related guides
- Removing instrument bleed from a vocal stem
- Clean a separated vocal stem
- What is an audio artifact?
- de-leak user manual
Sources
- iZotope RX 12 De-bleed description, izotope.com/products/rx-advanced, and the RX 12 edition table, izotope.com/products/rx-elements, read October 20, 2026.
- Acon Digital DeBleed:Drums, acondigital.com/products/debleed-drums, read October 20, 2026.
- Black Salt Audio Silencer, blacksaltaudio.com/silencer, read October 20, 2026.
- Waves Clarity Vx, waves.com/plugins/clarity-vx, read October 20, 2026.
- Demucs repository, github.com/facebookresearch/demucs, read October 20, 2026.
- de-leak-rt specifications and manual, intrect.io/products/de-leak-rt.
FAQ
Is stem bleed the same as mic bleed?
No. Stem bleed is what a separation model leaves of one instrument in another instrument's stem. Mic bleed is sound from one source picked up by another microphone while recording. The tools are usually built for one or the other.
Can a drum de-bleed plug-in clean bleed in an AI-separated stem?
The vendor pages we read describe microphone spill on drum recordings, and none says it is built for stems from an AI separation model. iZotope's page says its rebuilt De-bleed can isolate competing instruments, but we have not tested any of these tools on separated stems. Try one short phrase first.
Does de-leak-rt replace a better separation model?
No. It reduces what a separator left behind and cannot recover content the separator removed. If a stem is badly split, re-separating with another model can be a better first step, and some overlaps cannot be cleaned completely.
Should bleed removal come before artifact removal?
Yes when both are present. Reduce the foreign instrument first, then treat the watery or metallic damage attached to the content you kept.