
Compressor
COMP-IX
Fast BASIC compression, plus an ADVANCED view with sidechain, detector, stereo and tone controls.
FREE

NINEFX · VST3 for Windows & macOS
Five plugins made while finishing house and techno records: a compressor, a saturator, a clipper, a true-peak limiter and an analyzer. Every one of them is free.
Get club-loud masters with punchy kicks and a safe true-peak ceiling, then check your LUFS before you export. Free VST3 for FL Studio, Ableton Live and any VST3 host on Windows and macOS.
Shape, saturate, shave, limit, measure. Use one or run the whole chain.

Compressor
Fast BASIC compression, plus an ADVANCED view with sidechain, detector, stereo and tone controls.
FREE


True peak limiter
Dual-stage mastering limiter for house and techno, true-peak safe.
FREE

Saturation & harmonics
Two drive stages for grit and warmth, level-matched, with a live harmonics display.
FREE

Analyzer & meters
Spectrum, reference curves and loudness meters that never touch your audio.
FREE
COMP-IX → SAT-IX → CLIP-IX → LIMIT-IX → NEO-IX on your master bus, in three steps.
01 · Punch
COMP-IX sets the punch and glue at zero latency. SAT-IX adds grit and warmth at a matched level. CLIP-IX then shaves the sharpest peak tops with a clean hard clip at 0 dBFS and keeps the hit.
02 · Loud + safe
LIMIT-IX brings the master up to your target. Its shaper takes the short peak tops while held bass stays clean, and the true-peak ceiling keeps inter-sample peaks under control.
03 · Check
NEO-IX goes last, after the limiter. Check integrated LUFS, true peak and the spectrum against house and techno guides before you bounce.
The free IX Bundle is a complete mastering chain made while finishing house and techno records: COMP-IX for punch and glue, SAT-IX for saturation and harmonics, CLIP-IX to shave kick peaks, LIMIT-IX, a true-peak limiter designed primarily for house and techno, and NEO-IX to check LUFS, true peak and spectrum against genre placement guides.
Club masters often sit around -6 to -5 LUFS integrated with a -1 to -0.1 dBTP ceiling. Streaming services normalise loudness, so a -1 dBTP ceiling is the safest choice for streaming releases.
Yes. COMP-IX, CLIP-IX, LIMIT-IX, SAT-IX, NEO-IX and the IX Bundle are all free to download and use. No account, no licence key.
Yes. They are VST3 effects that work in any VST3 host on Windows 10/11 64-bit and macOS (VST3 and AU), including FL Studio, Ableton Live, Cubase, Studio One and Reaper.
IX Bundle
One installer, five plugins: COMP-IX, SAT-IX, CLIP-IX, LIMIT-IX and NEO-IX. No account, no licence key.
Windows 10/11 · macOS 10.13+ (Apple Silicon & Intel) · VST3 · AU
All IX Plugins in one place
Six free IX downloads: five plugins and the bundle. Each installer drops a VST3 into the standard folder and works in any VST3 host on Windows 10 or 11.







Podcast audio enhancer
One click turns a raw voice recording into a clean, broadcast-ready file. VST3 and standalone app.

One-click mastering
Listens to your whole track, then masters it in one click. VST3, AU and standalone app.
Analyzer & meters · v1.0.0
See your mix. Trust your master.
A free LUFS meter and spectrum analyzer VST3 for mixing and mastering house and techno: reference curves, loudness meters and scopes. NEO-IX never changes your audio: the output is the input, bit for bit.

Spectrum + reference
A big spectrum analyzer with reference curves shows where your low end and top sit. Genre placement guides cover Melodic Techno, Afro House, Progressive House, Tech House and Techno.

Loudness + scopes
True-peak L/R, mid and side bars, integrated LUFS, PLR and correlation, with loudness target and true-peak ceiling readouts. Put it last on the master, after your limiter, and the numbers match the bounce.

Listen on Phone
Stream NEO-IX's output to your phone's browser over Wi-Fi: scan the QR code, tap to start. No app needed. Delay is about 0.1–0.2 s, so it is a listening check, not timing-critical monitoring.
Views + presets
Switch between FULL and SIMPLE views. Start from 6 factory presets and save your own. Left-click PHONE for a phone-speaker simulation, the only thing that ever alters what you hear.
| Control | Range | What it does |
|---|---|---|
| VIEW | FULL / SIMPLE | Shows every panel, or a stripped-back view. |
| PRESETS | 6 factory + user | Recall a setup or save your own. |
| GENRE GUIDE | 5 genres | Placement guides for Melodic Techno, Afro House, Progressive House, Tech House and Techno. |
| PHONE (left-click) | On / Off | Phone-speaker simulation; changes what you hear only while lit. |
| PHONE (right-click) | Port 8090+ | Opens Listen on Phone; SWITCH ON starts the stream, which never starts by itself. |
| JITTER BUFFER | 60–150 ms | Set on the phone page to trade delay for stability. |
Compatibility
Install
NEO-IX v1.0.0
FREE
Windows 10/11 · macOS 10.13+ (Apple Silicon & Intel) · VST3 · AU
No. The output is the input, bit for bit. The only exception is the PHONE check button, which alters what you hear only while it is lit.
On the Master mixer track, last in the chain after your limiter, so the meters read what you will export.
About 0.1–0.2 s, with a jitter buffer you can set from 60 to 150 ms on the phone page. The stream is plain 16-bit PCM over your local network, unencrypted, so only use it on networks you trust.
Put both devices on the same Wi-Fi (not a guest network or mobile data), allow your DAW on Private networks in Windows Firewall, and turn off AP / client isolation on the router. On iPhone, switch off silent mode.
Presets live in %APPDATA%\NINEFX\NEO-IX\Presets. To uninstall, delete C:\Program Files\Common Files\VST3\NEO-IX.vst3 and rescan in your DAW.
NEO-IX v1.0.0 is a free LUFS meter and analyzer. Install it, drop it on the master, read the truth.
Windows 10/11 · macOS 10.13+ (Apple Silicon & Intel) · VST3 · AU
Compressor · v2.0.0
Shape the punch. See every hit.
COMP-IX v2 has two faces. BASIC is the fast, musical compressor you know, with a scrolling in/out waveform, peak and gain-reduction meters, DELTA and 10 factory presets. Switch to ADVANCED for pro sidechain, detector, stereo and tone controls built for mastering and bus work in House and Techno. BASIC sounds exactly like v1, so old projects and presets load the same.


Scrolling display
Grey is the input, neon green the output, and the peach line from the top is gain reduction. Drag the dashed threshold lines right on the display, and set the window from 1 to 16 s to see single hits or whole phrases.

DELTA listen
Click DELTA to hear only what the compressor removes. No compression means silence, make-up GAIN does not change it, and switching crossfades over 10 ms with no clicks.

Levels
Input and output peak meters (L R) with peak hold, plus a gain reduction meter. Click the meter panel to reset the held readouts.

Zero latency
With no latency, the MIX knob blends dry and compressed signal sample-aligned, from 0 % (untouched) to 100 %.
Presets + window
Save your own as .cmpix files. Resize the window from 630×364 up to 1800×1040; it keeps its proportions.
| Control | Range | What it does |
|---|---|---|
| INPUT | -24 to +24 dB | Drive into the compressor. |
| THRESHOLD | -60 to 0 dB | Where compression starts; also draggable on the display. |
| RATIO | 1:1 to 20:1 | How hard it compresses above threshold. |
| ATTACK | 0.1 to 200 ms | How fast it grabs. |
| RELEASE | 5 to 2000 ms | How fast it lets go. |
| GAIN | 0 to +24 dB | Make-up gain on the compressed signal. |
| MIX | 0 to 100 % | Parallel dry/wet; 0 % is the untouched dry signal. |
| OUTPUT | -24 to +24 dB | Final level. |
| BYPASS | On / Off | 10 ms soft crossfade, then bit-exact pass-through; also the host bypass. |
| DELTA | On / Off | Listen only to what the compressor removes. |
| WINDOW | 1, 2, 4, 8, 16 s | How much time the display shows; 4 s by default. |
Ctrl-drag for fine moves · double-click to reset · all controls automatable
Compatibility
Install
COMP-IX v2.0.0
FREE
Windows 10/11 · macOS 10.13+ (Apple Silicon & Intel) · VST3 · AU
Not by default. QUALITY starts at zero latency, so the parallel MIX is perfectly sample-aligned, and it stays zero with DELTA on. 2x oversampling adds 49 samples and 4x adds 61.
The signal entering the compressor (after INPUT) minus the compressed signal (before make-up GAIN): purely the gain reduction. MIX is ignored while DELTA is on, OUTPUT still applies, and BYPASS overrides it.
No. DELTA is automatable and saved with the project, but not part of presets.
SAVE writes .cmpix files to %APPDATA%\NINEFX\COMP-IX\Presets. Click the preset name for the full list and "Open presets folder".
Delete C:\Program Files\Common Files\VST3\COMP-IX.vst3 and rescan in your DAW. Delete %APPDATA%\NINEFX\COMP-IX too if you want your presets gone.
COMP-IX v2.0.0 is a free compressor VST3. BASIC for speed, ADVANCED for mastering and bus work, DELTA listen.
Windows 10/11 · macOS 10.13+ (Apple Silicon & Intel) · VST3 · AU
Clean clipper · v1.0.1
Shave peaks. Keep the hit.
A free, clean hard clipper VST3 for house and techno kicks, drum buses and masters, with a big scrolling clip display. One band, one CLEAN mode, and a ceiling fixed at 0 dBFS that the output can never pass.

Clip display
A scrolling waveform of the signal going in, on a scale from silence in the centre to +12 dB at the edges. Dashed lines mark the 0 dBFS ceiling: green stays under it, red is what gets clipped off.

Clip amount
The big CLIP readout shows how many dB the clipper is shaving, holding the highest value of roughly the last second. A 0 dBFS sine with INPUT +6 dB reads CLIP -6.0 dB; green 0.0 dB means nothing is clipped.

Levels
Input and output peak meters (L R) with peak hold and dBFS readouts, plus a CLIP meter from 0 to 12 dB. Click the panel to reset the held readouts.

Signal flow
INPUT → hard clip at 0 dBFS (2x/4x oversampled if chosen) → OUTPUT → re-clip at 0 dBFS. Pushing OUTPUT above 0 dB just clips harder, like more drive.
Presets + window
Presets store Input, Output, Link and Oversampling. The window resizes from 630×364 up to 1800×1040 and keeps its proportions.
| Control | Range | What it does |
|---|---|---|
| INPUT | dB gain | Drive into the clipper; more input means more clipping. |
| OUTPUT | dB gain | Level after the clip, re-clipped at 0 dBFS. Below 0 dB leaves headroom. |
| LINK | On / Off | Use with OUTPUT for level-matched listening. |
| OVERSAMPLING | 2x / 4x | Oversamples the clip stage; changes latency, so set it once. |
| MODE | CLEAN (fixed) | Symmetrical hard clip. |
| CEILING | 0.0 dBFS (fixed) | The output can never go above it. |
| WINDOW | 1, 2, 4, 8, 16 s | How much time the display shows; 4 s by default. |
Ctrl-drag for fine moves · double-click to reset · all controls automatable
Compatibility
Install
CLIP-IX v1.0.1
FREE
Windows 10/11 · macOS 10.13+ (Apple Silicon & Intel) · VST3 · AU
Yes, changing OVERSAMPLING changes the latency, so it is best set once rather than automated.
The signal is re-clipped at 0 dBFS after OUTPUT, so the ceiling always holds. Above 0 dB, OUTPUT just clips harder, like more drive. Use it below 0 dB for headroom.
How far the signal after INPUT peaks above 0 dBFS: how many dB are being cut off. It holds the highest value of roughly the last second.
SAVE writes .clpix files to %APPDATA%\NINEFX\CLIP-IX\Presets. They store Input, Output, Link and Oversampling.
Delete C:\Program Files\Common Files\VST3\CLIP-IX.vst3 and rescan in your DAW. Delete %APPDATA%\NINEFX\CLIP-IX too if you want your presets gone.
CLIP-IX v1.0.1 is a free clipper VST3. One knob of drive, one fixed ceiling.
Windows 10/11 · macOS 10.13+ (Apple Silicon & Intel) · VST3 · AU
True peak limiter · v2.0.0
Club loud. True-peak safe.
A free true-peak limiter VST3 designed for mastering house and techno. A clean lookahead limiter works with a wave-shaping stage that takes only the short peak tops, while held bass notes stay clean.

Dual-stage engine
The display splits the work: peach is clean-stage gain reduction, gold is shaper reduction, green the output under a dashed ceiling. Kick and snare tips go to the shaper; sub notes and pads stay with the clean limiter.

Hardness + mode
HARDNESS 0 is clean limiting only, 3–6 a soft saturating knee, 7–9 harder up to clipping. Versatile mode allows up to 9 dB of shaping; Loud allows 12 dB with faster recovery for denser, flatter transients.

Levels
True peak max, SHAPE MAX, GR MAX, and integrated, short-term and momentary LUFS with PLR. Raise GAIN until INTEGRATED reads your target while watching the reduction.

1:1 + DELTA
1:1 plays the limited sound at the input's loudness. DELTA plays only what the whole chain removes: quiet clicks on kicks are fine, audible bass or crunch means back off GAIN. Both are for monitoring; turn them off before export.
Recovery
AUTO brings kick and hat punch back fast while holding dense bass steady. INSTANT gives maximizer-style recovery, with a 16 ms bass-hold window that keeps low notes free of gain ripple.
| Control | Range | What it does |
|---|---|---|
| GAIN | 0 to +30 dB | Drive into the limiter: your loudness knob. |
| HARDNESS | 0 to 9 | How much peak work the shaper takes and how hard its knee is. |
| MODE | Versatile / Loud | Up to 9 dB or 12 dB of shaping at Hardness 9. |
| OUTPUT | -12 to 0 dBTP | The true-peak ceiling; peaks never go above it. |
| LOOKAHEAD | 0 to 10 ms | Longer is smoother bass, shorter more bite; 0 ms adds no lookahead latency. |
| ENVELOPE | 1 to 8 | Release curve shape: 1 is natural and loudest, higher holds then recovers faster. |
| RELEASE | 1 to 1000 ms | Recovery time of the clean stage. |
| AUTO | On / Off | Adaptive two-stage recovery; off uses one fixed RELEASE. |
| INSTANT | On / Off | Maximizer-style recovery; overrides AUTO and RELEASE. |
| CH LINK | 0 to 100 % | 100 % is the same gain on L and R for a stable image. |
| TRUE PEAK | On / Off | Ceiling applies to inter-sample peaks; keep it on for masters. |
| OVERSAMPLING | Off / 2x / 4x / 8x | Cleaner peaks and less shaper aliasing; 8x for the final render if CPU allows. |
| 1:1 | On / Off | Loudness-matched monitoring. Off before export. |
| DELTA | On / Off | Hear only what the chain removes. Off before export. |
| BYPASS | On / Off | 10 ms crossfade to the latency-aligned input; also the host bypass. |
Ctrl-drag for fine moves · double-click to reset · all controls automatable
Compatibility
Install
LIMIT-IX v2.0.0
FREE
Windows 10/11 · macOS 10.13+ (Apple Silicon & Intel) · VST3 · AU
It depends on LOOKAHEAD (0 to 10 ms; 0 ms means no lookahead latency, and the ceiling still holds) and on TRUE PEAK, which adds slightly more latency when on. BYPASS crossfades to the latency-aligned input.
-1.0 dBTP for streaming; -0.3 dBTP is fine for club and DJ WAV masters. Keep TRUE PEAK on for masters.
1:1 plays the limited sound at the same loudness as the input, so you judge sound, not volume. DELTA plays only what the shaper, clean limiter and true-peak safety remove. Both are monitoring only: before export, set 1:1 OFF, DELTA OFF, BYPASS OFF.
SAVE writes a user preset to %APPDATA%\NINEFX\LIMIT-IX\Presets. Click the preset name for the full list and "Open presets folder".
Delete C:\Program Files\Common Files\VST3\LIMIT-IX.vst3 and rescan in your DAW. Delete %APPDATA%\NINEFX\LIMIT-IX too if you want your presets gone.
LIMIT-IX v2.0.0 is a free true peak limiter. The last plugin on your master before NEO-IX.
Windows 10/11 · macOS 10.13+ (Apple Silicon & Intel) · VST3 · AU
Saturator · v1.0.1
Saturation & harmonics
SAT-IX is a saturation and harmonic enhancer with two original drive stages in series between input and output transformer models. DRIVE A adds grit with odd-leaning harmonics, DRIVE B adds warmth with even-leaning harmonics, and DENSITY pushes both harder while keeping your level. A live harmonics display shows exactly what's being added. Built for House and Techno, from subtle glue on the master to heavy drive on drums and bass.


Two drive stages
DRIVE A for odd-leaning grit, DRIVE B for even-leaning warmth, in series between input and output transformer models. DENSITY pushes both harder at the same level.
Harmonics display
A live display shows the harmonics SAT-IX adds, with in / SAT / out meters beside it.
Fair A/B
AUTO GAIN keeps the output level-matched, so you judge tone, not volume. DELTA plays only what's added.
Parallel sat
Blend in a parallel saturation voice, Smooth or Hot, focused on the Low, Mid or High band, with its own amount.
Sub guard
SUB GUARD keeps the low end clean: after saturation it restores your original signal below SG FREQ (30-150 Hz), in Low Latency or Linear Phase mode.
Punch + iron
PUNCH protects transients from the drive. IRON adds transformer character.
Stereo
Saturate the whole signal, only the Mid, only the Side, or both separately. ADV BYPASS switches the ADVANCED panel off for an A/B.
Presets
From Techno Drive to Velvet Reel Warmth: start points for masters, drums and bass.
| Control | Options | What it does |
|---|---|---|
| INPUT | Level | Drive into the saturation stages. |
| DRIVE A | Amount | Grit with odd-leaning harmonics. |
| DRIVE B | Amount | Warmth with even-leaning harmonics. |
| DENSITY | Amount | Pushes both drives harder while keeping your level. |
| TONE | Dark / Normal / Bright | Overall tilt of the saturated sound. |
| AIR | Amount | Top-end air. |
| MIX | Dry / wet | Blend of dry and saturated signal. |
| OUTPUT | Level | Final level. |
| AUTO GAIN | On / Off | Keeps the output level-matched. |
| QUALITY | Normal / HQ 2x / Ultra 4x | Oversampling. |
| DELTA | On / Off | Hear only what's added. |
| BYPASS | On / Off | Pass the signal through untouched. |
| Control | Options | What it does |
|---|---|---|
| PARALLEL SAT | Smooth / Hot · Low / Mid / High · amount | A parallel saturation voice with its own focus band. |
| IRON | Amount | Transformer character. |
| SUB GUARD | Low Latency / Linear Phase · SG FREQ 30-150 Hz | After saturation, restores your original signal below SG FREQ. |
| PUNCH | Amount | Protects transients. |
| STEREO | Stereo / Mid / Side / M+S | Where the saturation is applied. |
| ADV BYPASS | On / Off | Switches the ADVANCED panel off. |
Compatibility
What's new in 1.0.1
SUB GUARD now works as the last stage of the chain, so everything below SG FREQ stays your clean signal and no generated harmonics reach the sub. LOW LAT mode uses a much steeper crossover for a cleaner split.
SAT-IX v1.0.1
FREE
Windows 10/11 · macOS 10.13+ (Apple Silicon & Intel) · VST3 · AU
None at Normal QUALITY. HQ 2x adds 49 samples and Ultra 4x adds 61. The linear-phase SUB GUARD split adds more.
Not with AUTO GAIN on: it keeps the output level matched, so you hear the saturation, not a volume jump.
SAT-IX v1.0.1 is a free saturation and harmonics VST3, from subtle glue on the master to heavy drive on drums and bass.
Windows 10/11 · macOS 10.13+ (Apple Silicon & Intel) · VST3 · AU
Podcasts & spoken word · v1.3.0 · Coming soon
Intelligent Professional Audio Enhancer
One click turns a raw voice recording into a clean, even, broadcast-ready file. Drop your recording in, pick an output level, hit Enhance Audio, then drag the result straight into your DAW.
Launching soon. Follow @ninefxmusic on Instagram to hear first.

Both for Windows 64-bit.
In your DAW
For any VST3 host: FL Studio, Ableton Live, Reaper, Cubase, Studio One, Bitwig.
No DAW needed
The same engine as a standalone app, with Export Audio to save the enhanced file.

Standalone app
Open POD-IX.exe, drop in your recording, enhance it and export a 24-bit WAV. No DAW required.

In processing order.
70 Hz
Removes low rumble and handling noise below the voice.
New in 1.2.0 · Mono below 120 Hz
Re-centres a voice that sits off to one side: a louder, weaker, silent or out-of-phase channel. Mono and centred files pass untouched.
Levelling
Evens out loud and quiet talkers.
Two-pass
Learns the noise from every pause, with a natural low residual floor and no "musical noise".
Dynamics
Program-dependent release.
Whole-file analysis
Planned from the whole file, so it never clips word starts or soft endings.
New in 1.2.0 · About 1 dB
A clean soft clipper shaves the loudest peaks, like plosives and laughs, so the voice is louder at the same peak level.
New in 1.2.0 · Level-matched
A gentle tube-style stage adds presence and air, about 10% brighter.
0 / -3 / -6 dB
Holds the output to your chosen ceiling.
What's new in 1.3.0
Added in 1.2.0
POD-IX v1.3.0
Launching soon. Follow @ninefxmusic on Instagram to hear first.
Mastering · v1.1.0 · Coming soon
One-click mastering.
MAST-IX listens to your whole track, then masters it in one click. One fixed gain, learned from the whole song, lands the loudest sections around -7 LUFS short-term without pumping.
Launching soon. Follow @ninefxmusic on Instagram to hear first.

Four stages, in processing order.
Input stage
Catches the first peaks before the chain.
Glue
Glue compression that holds the mix together.
Clipping
Shaves the peaks for loudness.
True peak
True-peak limiting to your chosen ceiling.
One click
A big Master button does the whole job.
-0.1 / -0.3 / -1 dBTP
Pick the ceiling your release needs.
x2 / x4 / x8 / x16
Up to 16 times for the cleanest result.
Metering
Integrated, short-term and true peak.
Live
A live spectrum of the master.
A/B
Hear the original against the master.
Import & export
Import a file and export the master, or drag the result straight into your DAW.
MAST-IX v1.1.0
Launching soon. Follow @ninefxmusic on Instagram to hear first.
v1.1.0 · 5 plugins · one download
Mix to master. One chain.
One installer, five plugins: COMP-IX, SAT-IX, CLIP-IX, LIMIT-IX and NEO-IX. Shape the punch, add harmonics, shave the peaks, hit your loudness, then check it. Free.

In signal order on your master.




04 · Final loudness
True-peak limiting to your target, with the ceiling held.

05 · Analyze & meter
Last on the master: spectrum and loudness of what you export.
IX Bundle v1.1.0 · 5 plugins
FREE
Windows 10/11 · macOS 10.13+ (Apple Silicon & Intel) · VST3 · AU
What's included
Compatibility
One installer, five plugins, every one installed to your VST3 folder.
Windows 10/11 · macOS 10.13+ (Apple Silicon & Intel) · VST3 · AU
About
DJ · Producer · Mix & Mastering Engineer
NineFX is a DJ, producer and mixing and mastering engineer with more than 12 years behind the decks and the desk. His sound lives in melodic house & techno, with detours into afro house, indie dance and mainstage. He has shared lineups with W&W, Marnik and Mr. Black, played Sunburn and VH1 Supersonic, and earned support from Hardwell and Silver Panda.
The IX plugins grew out of his own studio: the tools he wanted for finishing club records, built from scratch and shared with fellow producers.
Contact
Questions, feedback or bugs: NineFX reads every email.
Free download
Follow NINEFX on Instagram and subscribe on YouTube to unlock this plugin.
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