FUSE
Every source plays every note. Frequencies melt around a siphon point you move through time — from a smooth morph to shared-spectrum cross-synthesis.
DEFAULT · SPECTRAL MORPH
Proof of Life Audio
SIPHON
Not a synth on its own. Scan your plugin library, link up to eight of your instruments into SIPHON, play one note — and melt them into a single sound that only exists on your machine.
Black Friday sale: $49 through Nov 30$49$79One-time license
Hosts your pluginsScans your pluginsMac + Windows3-day free trialOne-time license
STOCHASTIC SPECTRAL MORPHING
A sound you couldn't make twice by hand.
You pick the synths. SIPHON melts them together and keeps moving the blend, so every note comes out a little different. Parts of one instrument bleed into another, textures drift, and phrases you'd never have played show up on their own.
When something great happens, lock it. The same "accident" plays back exactly the same way every time, so you can build a track on it.
- Never sounds like a preset. The result depends on what you load, so nobody else has your sound.
- Ideas when you're stuck. Hold one chord and let it write the movement for you.
- Random you can keep. Save it with the project and it comes back identical tomorrow.
Under the hood: real-time spectral morphing between up to eight instruments, steered by probability instead of a fixed pattern.
Hear SIPHON in a session.
Short clips from real screen recordings — different sounds, not the same loop over and over.
Not an instrument
on its own.
SIPHON has no oscillators and no built-in sounds. You scan the plugins already on your computer, link up to eight of them into two banks of four, and play them from one keyboard. Blend them, trade them, or break them apart. Mac hosts VST3 and AU; Windows hosts VST3; inside Pro Tools it hosts them too. Audio files can load as sources too.
A digital plug-in for your studio. Not a sample pack. No hardware ships. Edit each linked plug-in inside SIPHON so your keyboard and MIDI keep going to the right place. Check compatibility
Four ways to
play the blend.
SLICE
Plays fragments of what every source is sounding right now, re-pitched to your keys — with click-free fades and tempo-aware splice lengths.
FRAGMENTS · KEYTRACKLIVE
Sources play directly under your fingers. No spectral melt, no slicing — just the instruments you loaded, ready to hand off and blend.
DIRECT · RESPONSIVEBOTH
Layers LIVE with SLICE so you can keep the direct sound under a moving curtain of fragments. Traverse, Blend, Glue, and Tune shape how the layers meet.
DIRECT · LAYEREDMotion through the blend
Traverse.
Scan, Wander, Step and Note decide how the siphon point moves across your sources. Rate sets the pace and syncs to your project tempo. Recall sets the odds of staying on the current source instead of moving. Lock makes the random moves repeat exactly the same way every time you press play.
Use Traverse to morph slowly across a bank, jump in rhythmic steps, or park on a seam and play from there.
The Reservoir.
SIPHON is always listening. The last 2 to 16 seconds of every source drain into the Reservoir. Hold pauses recording on a source so its capture stays put. Freeze locks the whole capture and saves it inside your project. Position picks where slices start, from oldest to newest audio, and Spread scatters them around that point. Splice sets slice length from 30 ms to 4 s, with tempo-synced options so cuts stay musical.
Hold · Freeze · Position · Spread · Splice
Six effects on
the handoff.
Undertow
A dark echo whose repeats drop an octave as they fade.
ECHO · SINKCavitate
Puts the sound inside a hollow, vocal-like cavity that shifts shape at every handoff.
HOLLOW · VOCALTurbine
Spinning modulation across the seam — motion you can feel without leaving the sources behind.
SPIN · MODHull
Hardens the body of the blend so morphs keep a shell around the changing interior.
BODY · SHELLWake
A smeared, blurry echo trail behind everything you play.
TRAIL · BLURErode
Bit crushing and sample-rate reduction, from gritty to wrecked.
CRUSH · LO-FIHandoff control. Effects can sit on everything or only on the seam between sources, so you shape the moment of trade without burying the instruments underneath.
Session details
The small stuff
that keeps you playing.
Open the Instrument scanner from SIPHON's menu once and it finds the plugins already on your computer. Then link them in. Tune pulls sources into one key. REC captures a take you can drag into your DAW. Open any linked plugin’s own editor inside SIPHON. Envelope shapes the played sound. Sixteen-voice slices, low-latency paths, FX bypass, and panic keep the session under control.
Save and load setups. Fifty-four factory presets. Ninety automatable parameters for deep DAW control.
One-time license.
Three computers.
SIPHON is a one-time purchase. After you buy, sign in to your account with your purchase email to get the installer and your license code. Open the plug-in, paste the code, and activate. Each code covers three computers. Deactivate a seat when you change machines.
One-time · License code in your account · 3 computers
Reviews
From people using SIPHON.
One-time license.
$49.
Mac + Windows. Requires your own instrument plugins (or audio files) to make sound.
Made for your DAW.
- Mac
- macOS 10.13 High Sierra or newer
Universal: Apple silicon and Intel, also under Rosetta
VST3 · AU · AAX (Pro Tools) · Standalone
Apple-notarized - Windows
- Windows 10 or 11, 64-bit (Intel/AMD or ARM)
Works in 64-bit and 32-bit DAWs, and natively on ARM PCs
VST3 · AAX (Pro Tools) · Standalone
Code-signed
Requires your plugins. SIPHON does not ship with synths or a sound library. Open the Instrument scanner from SIPHON's menu once and it finds the plugins already on your computer. Link instruments in (VST3/AU) and open their editors inside SIPHON.
Formats: VST3, AU (Mac), AAX (Pro Tools) and Standalone. No VST2. No iLok needed: the AAX is PACE-signed by Proof of Life Audio and uses your normal license code. Works in Pro Tools. Tested in Pro Tools Ultimate 2026.4.1, REAPER and FL Studio.
SIPHON is not a sample pack; no hardware is included.
SIPHON
Black Friday sale: $49 through Nov 30
$49$79USD
Plugin host & blender for Mac & Windows — not a standalone instrument.
You link your own synths. One-time license.
If you run into a problem after buying, chat with us within 3 days of purchase and we'll review a refund.
Download trial
3-day free trial. Enter your email to get the download. The same installer is used for the full version: after three days it asks for your license code.
Version 1.2.0 — now with Pro Tools (AAX). What's new
Secure checkout with Stripe. Mac + Windows license code in your account. Tax added where applicable. Questions: Chat with us.
Product details
What's new in 1.2.0?
Your existing license codes keep working, and saved projects and presets open unchanged. No iLok needed. Get the installer from the download panel or your account. Full notes on the changelog.
- Pro Tools support (AAX) for SIPHON, on Windows and Mac. In Pro Tools, SIPHON is an instrument: Instrument track > insert > Instrument > SIPHON.
- SIPHON inside Pro Tools can host your other instruments (VST3, and AU on Mac) through its own safe instrument scanner, the same way it does in other DAWs.
- Everything from 1.1.0 is included.
What's new in 1.1.0?
Your existing license codes keep working, and saved projects and presets open unchanged. Get the installer from the download panel or your account. Full notes on the changelog.
- New instrument scanner: reads your plug-ins in a separate safe process, so a broken or crashing plug-in can't take your DAW down. Lists instruments only, rescans only what changed, and has a scanner window with progress, cancel and a problem list.
- Fixed: some DAWs could hang on quit after SIPHON's window had been opened.
- Runs on much older Macs (macOS 10.13+; 1.0.1 needed the newest macOS).
- New on Windows: 32-bit DAWs and native ARM DAWs.
- More robust with unusual hosts (odd block sizes and sample rates).
What is SIPHON's latency?
About 12 ms in FUSE mode, and about half that with LOW LATENCY. Your DAW compensates.
What is SIPHON?
SIPHON is a plugin host and blender — not a standalone instrument with its own sounds. Open the Instrument scanner from SIPHON's menu once and it finds the plugins already on your computer. You link up to eight of your VST3/AU instruments (or audio files), play them as one, and open those plugin editors inside SIPHON. FUSE, SLICE, LIVE, and BOTH are ways to perform the blend.
Do I need other plugins?
Yes. SIPHON does not include synths or a factory sound library. You need instrument plugins already installed on your computer (or audio files to load as sources). Without something linked in, SIPHON will not make sound on its own.
How does licensing work?
One-time purchase. After you buy, sign in to your account with your purchase email to get your license code, paste it in the plug-in, and activate. Each code works on up to three computers. Deactivate a seat to move it.
Is it a synth / instrument VST by itself?
No. SIPHON has no oscillators and no built-in instrument sounds. It hosts and transforms plugins and audio files you already own.
Does it support AAX?
Yes. SIPHON 1.2.0 includes AAX for Pro Tools on Windows and Mac, alongside VST3, AU (Mac) and Standalone. No iLok needed. In Pro Tools, SIPHON is an instrument: Instrument track > insert > Instrument > SIPHON.
How does SIPHON relate to Governor Field Unit?
Governor Field Unit is a separate effect plug-in with its own product page and pricing. SIPHON is a one-time license for $49 (regularly $79).
Can I try SIPHON first?
Yes. Use the 3-day free trial on this page (Mac + Windows). Enter your email there to get the download. It is the same installer as the full version, and after three days it asks for a license code. If you run into a problem after buying, chat with us within 3 days of purchase and we'll review a refund.