Manuals, downloads, and a real person at the other end.

Sphinx 101 is a master bus processor DAW audio plugin that models an entire analog mastering unit at the component, circuit and even rail level. Instead of sampling what hardware sounds like, we simulate the actual electronic components - every transistor, vacuum tube, transformer core, and capacitor - and wire them together in real circuit topologies. The sound emerges from the physics, not from approximation. The result is twelve simultaneous mechanisms of analog behaviour (TrueRail) operating on your audio at all times, producing the depth, warmth and dimension that makes real hardware sound alive.

Most plugins model the input/output relationship of hardware - they measure what goes in and what comes out, then build a filter that copies it. Sphinx models what's INSIDE the hardware. Every component shares a virtual power supply, so when the compressor works hard, the voltage sags, and the EQ and transformers respond - exactly like real circuits. This interconnection produces emergent behaviour that no static algorithm can replicate. We verified this with 2,043 automated measurements and seven A/B comparisons against leading commercial plugins.

AU on macOS 11 (Big Sur) or later, in two separate single-architecture builds: Apple Silicon (arm64) for M1/M2/M3/M4 Macs, and Intel (x86_64) for Intel Macs. The Intel build also runs on Apple Silicon via Rosetta 2; the Apple Silicon build does not run on Intel Macs (Rosetta 2 only translates x86_64 to Apple Silicon, never the other direction). VST3 on Windows 10 or later (x64). Approximately 50 MB disk, 4 GB RAM. Works in any AU or VST3 host.

Any DAW that supports AU or VST3: Logic Pro, Ableton Live, Pro Tools (VST3), Cubase, Studio One, Reaper, FL Studio, Bitwig, Digital Performer, and others.

No. Sphinx runs on any Mac or Windows PC meeting the system requirements. No iLok dongle, no external hardware, no special audio interface needed. A good pair of headphones or monitors is recommended so you can hear the subtleties of the analog modelling.

The plugin itself never goes online - neither before, during, nor after activation. Only your browser does, on our activation page. You paste your serial in the plugin, copy the challenge code, paste it on the page from any computer with a browser, get a response code, paste that back into the plugin. The whole exchange takes about 60 seconds. No dongles, no cloud verification, no background services. We collect only your email, name, serial and machine ID - nothing else.

Two. Your serial activates on up to 2 machines simultaneously. If you need to move to a new computer, deauthorize the old one first - it takes 60 seconds and frees the seat immediately.

If you still have access to the old one: open Sphinx, click the key icon, click Deauthorize, and follow the short steps. Your seat is freed instantly and you can activate on the new machine. If you can't access the old machine (it died, was stolen, etc.), email support with your serial number and we'll reset your activation.

Yes. Sphinx runs in full demo mode without a serial key - every feature, every circuit, every transformer model, no restrictions. The only difference is a brief 2-second silence about every 90 seconds. This lets you evaluate the actual sound quality on your own material before committing.

Nothing happens to already-authorized installations. Your license is stored locally and works offline permanently. The server is only needed during the one-time activation moment. If it's temporarily down, just try again later - your serial doesn't expire.

Insert it on your master bus (or any stereo bus), hit play, and listen. The default preset is carefully tuned as a starting point. Then try switching between the three circuits (SLL, Nevy, Amok) to hear how each one changes the character of your mix without changing the volume. From there, experiment with the transformer drive and the compressor threshold.

Sphinx is calibrated for −6 dBFS peak. This is the sweet spot where the analog modelling produces its most musical harmonics. If your mix is peaking at 0 dBFS, pull the Input Gain down by about 6 dB. If it's very quiet (below −12 dBFS), bring it up. The VU meters are calibrated so that 0 VU = −6 dBFS.

Three complete circuit personalities. SLL is solid-state precision - tight, punchy, transparent, inspired by classic British console bus amplifiers. Nevy is transformer-coupled warmth - rich, full, dimensional, inspired by legendary British recording consoles. Amok is all-tube - deep, saturated, breathing, modeled with real vacuum tube equations. Each one changes not just the drive character but the entire chain: compressor behaviour, EQ response, and transformer interaction all adapt.

They select how much manufacturing variation is in the circuit's individual components themselves. They offer the experience of having three separate production units of the same hardware, with slight factory-build component variations. They offer a range of sonic options from subtle, nearly transparent - perfect for multi-instance use or when you want just a hint of analog warmth, to balanced amount of component variation - great for most work, up to maximum variation - closest to real hardware and ideal for final mastering where you want every nuance of real-life like circuits.

Because every real piece of hardware does too. No two resistors are exactly 10 kΩ. No two capacitors are exactly 100 nF. Sphinx randomizes every component value within real manufacturing tolerances, seeded per plugin instance. Your left and right channels process through slightly different circuits, and your Sphinx sounds microscopically different from anyone else's - just like two units of the same hardware model are never perfectly identical.

Four physically different core materials, each with distinct character. M1166 (silicon steel): warm, rich, earliest saturation onset - the classic "console transformer" sound. C9049 (nickel alloy): authoritative, controlled, strongest bass compression - punchy and defined. K1166 (grain-oriented steel): tight, fast, minimal overshoot - great for transient-heavy material. L1544 (amorphous core): ultra-transparent, odd-harmonic character, essentially zero saturation - when you want iron-path bandwidth without colouration.

It controls how hard you push the transformer's magnetic core. At 100 % (12 o'clock), the transformer operates at its designed sweet spot, adding subtle harmonic character. Push past 150 % and you'll hear the core saturate - bass gets rounder, harmonics get richer, transients get smoother. This isn't a digital gain boost followed by a waveshaper. It's the actual nonlinear saturation curve of the modeled core material responding to increased magnetic flux.

Four distinct topologies, each modeled from real hardware behaviour. The SLL circuit grabs fast with a hard knee - the classic VCA bus comp feel. The Nevy circuit has a characteristic "hang" in its release where it holds briefly before letting go - the musical breathing quality. The Amok circuit adds harmonics that increase with gain reduction - it gets warmer as it works harder. The Maney (Vari-Mu) circuit is fully program-dependent - it adapts to your material over time because the tube's operating point shifts with the signal history. In our measurements, beat 8 produces measurably different compression from beat 1.

No. Each EQ band has a real inductor model with saturation characteristics. At gentle settings, it's a clean, precise EQ. Push the gains harder and the inductors saturate, adding harmonics that interact with the frequency shaping - warmth that's physically generated, not artificially added. The four circuit topologies each have different Q behaviour and saturation character which real hardware users will recognize.

Most plugins blend a wet and dry copy of the signal, which causes comb filtering (phase cancellation between the two paths). Sphinx does it differently - the Parallel knob scales each module's processing INTENSITY, not the signal amplitude. At 50 %, every knob is halfway between its default and your setting. There's always ONE signal path, zero phase cancellation. This is why you can sweep the parallel mix without hearing any phasiness or hollowness.

Yes, for most work. Sphinx 101's AutoGain uses static parameter-based compensation combined with a slow (~6-second) gain-reduction average to hold your loudness at unity. It preserves all dynamic shape — compression pumping, transient character, crest factor — and only corrects the static offset. It does not chase the signal sample-by-sample, so it never fights your compressor. It does not compensate the Output Gain knob, which remains your final manual level control. Turn AutoGain off when you're targeting a specific output loudness for delivery.

At 2× oversampling (default): typically 3–10 % of a single core on Apple Silicon. The twelve simultaneous TrueRail mechanisms are computationally intensive - you're running real physics simulations, not just filters. Higher oversampling increases CPU proportionally. Use 2× for tracking and mixing, 4× or higher for final masters.

2× for most work — at the default 2× the actual aliasing is already suppressed to about −120 dB, far below the analog noise floor. 4× for final masters and critical listening. 8× if you're driving heavy saturation with bright source material. 16× for offline rendering when CPU doesn't matter. All four are fully functional and selectable in real-time. The visible measured floor (≈−74 dB) is set by TrueRail's analog character (power-supply and thermal noise), not by digital artifacts — higher factors push aliasing even further below this floor.

Yes, a small amount from the oversampling filters. The latency is reported sample-accurately to your DAW for automatic delay compensation. You won't hear any timing offset in your mix.

Yes. All 72 parameters are fully automation-compatible. Parameter changes are smoothly interpolated with no clicks or zipper noise.

Verified identical sonic character at 44.1, 48, 88.2, 96, 176.4, and 192 kHz. We run specific tests at every sample rate to confirm consistent behaviour across the full range.

The Signal Analysis grid shows Plugin Doctor measurements of Sphinx 101's three console circuits (SLL, Nevy, Amok) across three measurement types.

Top row (Hammerstein) shows how each circuit generates harmonics across the frequency spectrum. Each colored line represents a harmonic order — G(1) is the fundamental, G(2) is the 2nd harmonic, G(3) the 3rd, and so on. SLL shows balanced G2/G3 kernels — the BJT's exponential I-V characteristic produces equally weighted even/odd harmonics. Nevy shows G2 dominant by ~5–8 dB — the asymmetric Class-A bias and off-centre operating point produce the even-harmonic warmth characteristic of this console class. Amok shows G2 dominant by ~15 dB — the 12AX7 triode's asymmetric transfer curve produces near-pure 2nd-harmonic content.

Middle row (THD) is Total Harmonic Distortion at 500 Hz. The pink spectrum shows all harmonic energy generated by each circuit. SLL measures −62.0 dB (0.08 % — very clean). Nevy measures −51.7 dB (0.26 % — warm, enriched). Amok measures −28.7 dB (3.67 % — rich tube saturation). These values match real hardware measurements of the console types they model. Exact values vary ±2 dB between sessions due to TrueRail's thermal drift modeling — the circuit's operating point shifts over time, exactly like real hardware.

Bottom row (Phase) shows how each circuit shifts the phase of the signal across frequency. The distinctive curves below 200 Hz reveal each circuit's analog character — the low-frequency phase rotation that gives analog consoles their dimensional quality. Measured with the K1166 input transformer at 100 % drive.

All measurements were taken at −6 dBFS (our calibrated operating level), 48 kHz, with 16× oversampling and TrueRail mode B active.

Yes — this is one of the most physically accurate behaviours in Sphinx 101. The undulation is TrueRail's thermal drift modulating the virtual tube's operating point, exactly as happens in real vacuum tube hardware. A tube's plate resistance changes with temperature, shifting the harmonic balance over time. Since the left and right channels have independent thermal drift, they oscillate at different rates — creating the wave pattern.

SLL and Nevy use transistor topologies with stronger negative feedback that stabilises the operating point. If you measure a real tube preamp with Plugin Doctor for 60 seconds, you'll see the same behaviour. The tube is breathing.

No — these are the deliberate THD values of the three console personalities at the −6 dBFS operating sweet spot, and they match the console classes they model: a transparent VCA-bus British console measures around 0.08 %, a transformer-coupled British console around 0.26 %, and a valve console around 3.67 %. This is musical harmonic content from the modeled circuitry — primarily 2nd-harmonic warmth — not digital distortion. It is exactly what gives each personality its distinctive character. (See the Owner's Manual, "Signal Analysis & Measurement Guide," for the full breakdown.)

No. The floor (around −70 to −74 dB) comes from the TrueRail power-supply model and the ThermalDrift component-aging simulation — the modeled noise of a real analog supply and thermally-varying parts. The actual digital aliasing sits far lower — about −120 dB at the default 2× oversampling (measured on a saturating stage in isolation) — well below this analog floor, so what you see is the modeled noise, not aliasing. The floor is identical at every oversampling rate (2× through 16×), which is the proof that it is analog modeling, not aliasing: real aliasing falls as oversampling rises, analog noise does not.

Yes. With the main circuit only (no transformers), the phase is very close to zero across the entire audio band. When transformers are enabled, each one adds its reactive phase signature — the curve you see is the physical consequence of iron-core transformer models with coupling capacitors and winding inductances. The shape and amount of rotation matches what you'd measure on real analog consoles with transformer-coupled bus paths.

Each transformer contributes approximately one full rotation from its reactive elements — the coupling capacitor, winding inductance and resistance, and shunt capacitance. With both the Input and Output Transformer enabled, the full chain shows roughly two wraps. The DriveStage contributes effectively zero phase rotation because its oversampling uses a linear-phase FIR filter that adds only pure delay, fully compensated by the DAW. The band-split compressors (Sub Comp, HF Comp, HF Softclip) are deliberately sidechain-only — their crossover filters never touch the main audio, adding no phase rotation. A small amount of additional HF phase appears above 18 kHz from the oversampling anti-aliasing filters on the transformer oversamplers — completely inaudible.

No. These come from the valve stage's plate-decoupling and cathode-bypass capacitor interaction at sub-audio frequencies. The behaviour is measurable in real tube equipment and is unique to the valve topology — it does not appear on the solid-state SLL or the transformer-coupled Nevy. Below 5 Hz it is completely inaudible.

This is correct analog behaviour, not a gain error. Cumulative phase rotation from the modeled circuit shifts the waveform shape of complex material, which raises instantaneous peaks while RMS (perceived loudness) stays at unity — exactly what happens when you run audio through a real analog console. AutoGain holds the loudness; the peak rise is the physical consequence of frequency-dependent phase rotation. Your LUFS meter will confirm the loudness is unchanged.

Many emulations model a console's frequency response and harmonic distortion but use minimum-phase EQ curves rather than physically reactive component models. Sphinx's phase rotation comes from actual transformer models with coupling capacitors, winding inductance, and core hysteresis — producing the same kind of frequency-dependent phase shift you'd measure on real iron-path hardware. The result is approximately two full rotations in the full chain, consistent with what a real transformer-coupled analog console produces.

Rescan your plugin folder in your DAW's preferences. In Logic Pro, it usually appears automatically. If not, try restarting your DAW or your computer.

Make sure you copy the challenge code exactly from the plugin - use the Copy button, don't type it manually. The code is case-sensitive and any modification will be detected and rejected. If it still fails, click Cancel in the plugin, click Authorize again to generate a fresh challenge, and try once more.

Try reducing oversampling to 2×. Increase your DAW's buffer size. Bypass any modules you're not actively using. At 2× oversampling and 512 buffer size, Sphinx typically uses 3–10 % of a single core on Apple Silicon.

You're probably driving the input too hot. Sphinx is designed for −6 dBFS peak, not 0 dBFS. Pull the Input Gain down by 2–4 dB and listen to how the sound opens up. The nonlinear components sound their best when they're not being overdriven beyond their designed operating range - just like real hardware.

No. One-time purchase, yours forever. Free updates within the same major version. No recurring charges, no annual renewal, no "rent-to-own."

The full demo mode lets you evaluate every feature on your own material before buying. We encourage you to spend real time with the demo. If you purchase and encounter a technical issue we can't resolve, contact support and we'll work with you.

No. The activation server stores only your serial number, email, name, and a hashed machine identifier for seat tracking. The plugin itself contains no analytics or telemetry and never connects to the internet after activation. The website uses Google Analytics and Meta Pixel for anonymous visitor analytics — both are consent-gated and only activate after you accept cookies. Your serial, machine hash, and payment details are never sent to Google or Meta. We share data only with Paddle (payments), Google (page-view analytics), and Meta (page-view analytics). No data sold, no ads.

Email support. We're a small team and we actually read every message. Include your serial number if it's an authorization issue.