Orpheo Music Production

Console Curve Geometry

Orpheus Aphrodite

A zero-latency console EQ focused purely on curve geometry rather than CPU-heavy analog smear. Models API 550b, SSL 242, and clean Helios Type 69 filter shapes via optimized biquads.

Technical Specs

Console DNA Captured In Pure Curve Geometry

Zero-Latency Console Biquad Architecture

Topology: API 550b Orpheus Aphrodite API 550b curve geometry
Topology: SSL 242 Orpheus Aphrodite SSL 242 curve geometry
Topology: Helios Type 69 Orpheus Aphrodite Helios Type 69 curve geometry
Helios Step: -3 dB Helios console stepped low cut -3 dB position
Helios Step: -6 dB Helios console stepped low cut -6 dB position
Helios Step: -9 dB Helios console stepped low cut -9 dB position
Helios Step: -12 dB Helios console stepped low cut -12 dB position
Native Host UI (CLAP in REAPER) Orpheus Aphrodite native parameter control in REAPER
Minimum-Phase Response Aphrodite minimum-phase tracking in PluginDoctor
Buffer Performance Sweep Aphrodite zero-latency performance profile
Dynamic Biquad Topology Engine

Orpheus Aphrodite executes dynamic filter coefficient recalculation per sample block. Switching console topologies via the host parameter does not load pre-rendered impulse responses or static convolution kernels. It alters the active coefficient mathematics directly, preserving pure minimum-phase tracking, zero algorithmic latency, and absolute numeric precision.

API 550b: Proportional-Q

Bandwidth responds dynamically to gain depth. Gentle 2 dB adjustments maintain broad, transparent curves for tonal shaping. Pushing into aggressive ±12 dB territory narrows the filter skirt automatically into focused corrective shapes without requiring a secondary Q control.

SSL 242: Deterministic Constant-Q

Filter bandwidth remains locked and symmetrical across all boost and cut depths. This delivers surgical isolation and constant band separation, preserving adjacent frequency relationships regardless of how heavily a band is driven.

Helios Type 69: Inductor & Stepped Cut

Models passive R/C/L inductor curve interactions. Mid bands exhibit authentic musical resonance, while the low-cut circuit accurately models the physical console's stepped inductor taps at -3 dB, -6 dB, -9 dB, and -12 dB instead of a generic continuous slope.

First Clean Helios
Unlike existing emulations that force static line hum, preamp clipping, and heavy convolution kernels, Aphrodite isolates the raw Helios Type 69 inductor curves into clean, responsive filters
Topologies
Dynamic switching between American Proportional-Q (API 550b), the surgical SSL 242 Black Knob console response, and vintage Helios Type 69 filter shapes
Transient Preservation
Phase-accurate frequency shaping with zero added distortion, CPU drag, or latency (0 PDC)
Subsonic Clean
Topology-matched high-pass filtering (18 dB/octave on SSL 242, 12 dB/octave on API 550b and Helios) to clear subsonic rumble
[ Sweet-Talk The Curves ]

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Technical Specifications

Engine Details

Filter Engine
SIMD-optimized Direct Form II Transposed biquad filters
Console Topologies
API 550b (Proportional-Q), SSL 242 (Black Knob), Helios Type 69 (Clean Inductor)
Subsonic Filter
18 dB/octave on SSL 242, 12 dB/octave on API 550b and Helios
Latency
0 samples (Zero PDC)
Formats
CLAP and VST3 native (Linux, Windows, macOS)
UI Framework
100% GUI-less with host-rendered DAW menus and sliders
License
Mozilla Public License 2.0 (MPL-2.0)

macOS Gatekeeper Notice

Binaries are unsigned. Load the plugin once in your DAW, navigate to System Settings > Privacy & Security, and click Open Anyway

Alternatively, open the Terminal app and strip the quarantine flag manually:

xattr -dr com.apple.quarantine ~/Library/Audio/Plug-Ins/CLAP/*