| Preset Name | Shift (Hz) | LFO Modulation | Dry / Wet | Space Profile | Silence Voids | Short Description | Action |
|---|---|---|---|---|---|---|---|
| Subtle Vocal Doubler | +3 Hz | Sine ±2 Hz @ 0.5 Hz | 50% | Office (35 mĀ³) | Off | Dimensional micro-pitch drift and warm residential early reflections for vocals. | |
| Deep Sci-Fi Void Resonator | -150 Hz | Saw R ±50 Hz @ 2.0 Hz | 100% Wet | Cathedral (85k mĀ³) | Active (4th-Order Mute) | Cavernous pitch dive with brickwall zero-energy voids at 1ā2k and 8.5ā9.5k. | |
| Acoustic Room Normalizer | 0 Hz | Off | 0% (Bypass) | Standard (90 mĀ³) | Off | Transparent linear dry passthrough for acoustic baseline testing. | |
| Wideband Ring-Mod Disrupter | +750 Hz | Triangle ±250 Hz @ 5.0 Hz | 90% Wet | Auditorium (2.8k mĀ³) | Active | Fast non-harmonic frequency sweeping with dual speech/sibilance voids. | |
| Whisper Isolation Pod | +10 Hz | S&H ±5 Hz @ 1.0 Hz | 75% Wet | Cranial Helmet (0.08 mĀ³) | Off | Cranial 0.08 mĀ³ reflection damping with gentle stochastic jitter. | |
| Pure Spectral Void Sieve | 0 Hz | Off | 100% Wet | Standard (90 mĀ³) | Active (Muted) | 0 Hz neutral passthrough with absolute zero-energy voids at 1ā2 kHz and 8.5ā9.5 kHz. |
Emits a multi-octave acoustic test burst (500Hz + 1000Hz), samples 32-bit float linear decay buffers with microsecond timestamps, and calculates the true room decay slope (T20 → RT60), ambient modal resonance, and noise floor.
| Preset ID | Acoustic Space Profile | Volume | RT60 Decay | Air Resonance | Pre-Delay & ITD | Bass Warmth (BR) | Description / Character | Action |
|---|---|---|---|---|---|---|---|---|
micro_helmet |
Cranial Pod / Helmet Abs. Min | 0.08 mĀ³ | 0.02 s | 1,150 Hz | 0 ms (ITD: 0.3 ms) | 0.85 | Lumped-element pressure stiffness cavity; near-zero propagation decay. | |
cockpit |
Aircraft Cockpit / Kiosk | 1.2 mĀ³ | 0.05 s | 720 Hz | 2 ms (ITD: 0.8 ms) | 0.90 | Ultra-compact metal/glass boundary reflection chamber. | |
booth |
Vocal Isolation Pod | 2.5 mĀ³ | 0.08 s | 520 Hz | 0 ms (ITD: 1.2 ms) | 0.95 | Tightly damped studio vocal booth with rapid specular absorption. | |
office |
Small Studio / Bedroom | 35 mĀ³ | 0.35 s | 240 Hz | 6 ms (ITD: 2.5 ms) | 1.05 | Treated residential room with balanced early reflection decay. | |
standard |
Standard Tracking Space DEFAULT BASELINE | 90 mĀ³ | 0.75 s | 175 Hz | 0 ms (ITD: 3.5 ms) | 1.00 | Authentic off-axis studio condenser microphone baseline ambience. | ✔ ACTIVE |
auditorium |
Concert Recital Hall | 2,800 mĀ³ | 1.80 s | 95 Hz | 22 ms (ITD: 8.0 ms) | 1.15 | Expansive lateral reflection spread with smooth musical decay. | |
cathedral |
Gothic Cathedral | 85,000 mĀ³ | 5.50 s | 48 Hz | 45 ms (ITD: 15.0 ms) | 1.30 | Massive stone nave with 45ms pre-delay and dense reverberant tail. | |
hangar |
Airship Hangar / Cistern | 180,000 mĀ³ | 7.20 s | 34 Hz | 65 ms (ITD: 22.0 ms) | 1.40 | Enormous steel/concrete enclosure with heavy structural air resonance. | |
mega_canyon |
Granite Mega-Canyon Abs. Max | 650,000 mĀ³ | 10.50 s | 22 Hz | 85 ms (ITD: 35.0 ms) | 1.55 | Semi-bounded geological space dominated by molecular air absorption. |
| Column / Parameter | Acoustic Definition | DSP Simulation Implementation | Perceptual Audio Impact |
|---|---|---|---|
| Preset ID | Programmatic key representing a calibrated architectural room preset. | Lookup key in AudioEngine.createVirtualRoomStream() selecting filter coefficients and cached impulse buffers. |
Instantaneous, click-free switching between architectural room models. |
| Acoustic Space Profile | Physical classification modeling structural geometry and reflective boundary materials. | Configures pre-delay timing, convolution duration, and high-frequency atmospheric damping factors. | Establishes perceived room scale, proximity to reflective boundaries, and spatial presence. |
| Physical Volume | Enclosed three-dimensional air volume (V) in cubic meters (mĀ³), spanning 0.08 mĀ³ to 650,000 mĀ³. | Calculates mean free path (l = 4V/S) and impulse buffer allocation (L = fs Ć tir). | Controls boundary bounce frequency; small volumes sound tight, large volumes sound cavernous. |
| RT60 Decay | Reverberation Time 60ātime for acoustic energy to drop by 60 dB (Sabine formula: RT60 ā 0.161 Ć V / A). | Sample-by-sample exponential decay envelope: h(t) = noise(t) Ć e-t / Ļ where Ļ = RT60 / ln(1000). | Determines trail duration. Short times (0.02 s) produce dry intimacy; long times (10.5 s) sustain shifted harmonic tails. |
| Air Resonance | Dominant fundamental cavity resonant mode of the enclosed air mass combined with structural draft. | 2nd-order Biquad bandpass filter (f0 in Hz, Q-factor) filtering a looped pink noise bed. | Injects physical air presenceāfrom cranial cavity boxiness (1,150 Hz) to infrasonic canyon rumble (22 Hz). |
| Pre-Delay & ITD | Direct acoustic delay before first wall reflection plus interaural time difference between left and right ears. | Discrete silence offset buffer padding plus channel-specific ITD offset in Right channel buffer. | Creates true binaural head-related spatial width on headphones instead of flat dual-mono reverberation. |
| Bass Warmth (BR) | Bass Ratio: ratio of low-frequency reverberation decay (125ā250 Hz) to mid-frequency decay (500ā1000 Hz). | Time-dependent exponential low-frequency booster applied during analytical impulse response generation. | Replicates physical mass wall reflection behavior, enriching bass weight and spatial authority. |
| Description / Character | Perceptual acoustic signature detailing reflection density, pre-delay gap, and atmospheric frequency absorption. | Calculates initial silence pre-delay offsets (0 ms to 85 ms) and distance attenuation curves: 1 / (1 + Ī±Ā·t). | Imparts authentic off-axis boundary coloration, specular vs. diffuse spread, and distance perception. |