OBS ships with basic audio filters, but if you want studio-grade noise reduction, compression, or de-essing on your voice, VST plugins unlock a whole world of free and paid processing right inside your stream. Setting them up is simpler than it sounds, and the results can rival a hardware audio chain.
What VST plugins are
VST (Virtual Studio Technology) is a plugin format used across music and broadcast software. A VST is a small audio processor, such as a gate, compressor, EQ, or noise-reduction tool, that loads inside a host. OBS acts as a host through its “VST 2.x Plug-in” filter, so any compatible plugin you install can process your microphone in real time.
Why bother when OBS has built-in filters?
The stock filters are fine for basics, but dedicated VSTs are often better sounding and more controllable. Popular free choices include broadband noise-reduction plugins, transparent compressors, and de-essers that outperform the built-in options, especially on harsh or noisy mics.
Setup steps
| Step | Action |
|---|---|
| 1 | Download a 64-bit VST2 plugin (.dll on Windows) |
| 2 | Place it in a folder OBS scans, e.g. C:\Program Files\VstPlugins |
| 3 | In OBS, right-click the mic, choose Filters |
| 4 | Add “VST 2.x Plug-in” and select it from the dropdown |
| 5 | Click “Open Plugin Interface” and dial in settings |
Match the plugin’s bitness to OBS. Modern OBS is 64-bit, so you need 64-bit VST2 plugins; a 32-bit DLL simply will not appear in the list. If your plugin never shows up, that mismatch is the usual culprit.
Chain order matters
You can stack several VST filters, and OBS processes them top to bottom. A sensible voice chain is noise reduction first, then EQ, then compression, then a limiter to catch peaks. Drag the filters into that order in the Filters window so each stage receives a progressively cleaner signal.
A dependable free voice chain
You can assemble a broadcast-quality signal path entirely from free VSTs. A typical order is a noise-reduction plugin to knock down background hiss, a gate to silence the mic between sentences, an EQ to shape tone, a compressor to even out level, and a limiter to catch stray peaks. Each stage does one job, and keeping them in that order means every plugin receives a progressively cleaner signal to work on.
Watch your total added latency if you monitor yourself in headphones. Most of these plugins add only a millisecond or two, but a heavy look-ahead limiter or a convolution reverb can push the delay high enough to feel like an echo when you talk. If that happens, either disable software monitoring and listen through your interface’s direct monitor, or swap the offending plugin for a lighter one. On air, a few milliseconds is inaudible to viewers.
Frequently asked questions
Do VST plugins add latency to my stream?
Most lightweight voice VSTs add only a few milliseconds, which is inaudible on a live stream. Heavy look-ahead limiters or convolution reverbs can add more. If you monitor your own voice in headphones and notice an echo-like delay, switch monitoring off or choose lower-latency plugins.
Are free VST plugins good enough for streaming?
Absolutely. Several widely used noise-reduction, compressor, and de-esser VSTs are free and sound excellent for spoken voice. Paid plugins offer polish and convenience, but a free chain of gate, EQ, compressor, and limiter already produces a clean, professional stream sound.
Bottom line
VST support turns OBS into a capable voice-processing studio. Install 64-bit VST2 plugins into a scanned folder, add them through the VST 2.x filter, and order them noise reduction, EQ, compression, limiter. Start with free plugins, keep the chain modest to avoid latency, and your microphone will sound dramatically more polished on air.
