COM (Chain of Mastering) — User Operational Guide
Complete mixing and mastering engineer reference for COM (Chain of Mastering) (com.audiostudiopro.com): 5-Stage Precision Mastering Chain (Utility & Stereoize Imager, Multi-Model Spectral Tape & Tube Exciter, 6-Band Linear-Phase Dynamic EQ, Analog-Modeled Bus Glue Compressor, True Peak Lookahead Limiter), 9:16 Vertical Split-Console Architecture, Chasing-Arrows Mastering Ring with Radial Light Trails, 12 Factory Mastering Chains & Offline Cryptographic License Manager.
Overview & 9:16 Vertical Architecture
COM (Chain of Mastering) is an all-in-one mastering console engineered into a modern 9:16 vertical window (optimized for contemporary multi-display studio setups and vertical mixing workflows). The interface is divided into two synchronized sections:
- Top Header Bar: Audio Studio Pro signature Brand Cell (
COMwithCHAIN OF MASTERING), automatic▲ NEWsoftware upgrade badge, preset management (<,>,SAVE,LOADwith.compresetexport), 64-step universal Undo (↺) & Redo (↻), A/B comparison, HQ Oversampling (1x,2x,4x), master BYPASS, and 7-Day Trial / Offline License Manager. - Upper Half — The Chasing-Arrows Mastering Ring: A circular ring of 5 interlocking chasing arrows arranged clockwise in signal-flow sequence:
1. UTILITY→2. SATURATOR→3. EQUALIZER→4. COMPRESSOR→5. LIMITER. Left-clicking any arrow smoothly rotates the ring clockwise with luminous comet trails until the stage locks at the 12 o'clock position. - Central Hub Telemetry: High-precision cumulative Average / Integrated LUFS (left-click to reset), Short-Term LUFS, Gain Reduction (GR), Dynamic Crest Factor (DR), and a one-click GAIN MATCH button for loudness-neutral A/B evaluation.
- Lower Half — Active Tool Control Console: Real-time visual analyzer, routing toggles, and surgical parameter knobs for the currently docked mastering processor.
GUI Resizing, 9:16 Aspect Ratio & Window Scale Presets
COM's sleek 9:16 vertical mastering console (reference 540 × 960) scales seamlessly to fit any display setup:
- Proportional Vertical Resizing: Click and drag the bottom-right resize corner. The 9:16 vertical mastering strip ratio is permanently locked, providing crisp typography and smooth FFT curves.
- Display Auto-Fit: On launch, COM inspects your available screen height and selects the optimal scale (0.9× / 486×864 on laptops, 1.0× / 540×960 on Full HD, 1.25× / 675×1200 on 2K/4K displays).
- Window Size / Scale Menu: Single-click the center Preset display or top menu to open
Window Size / Scalepresets:Auto-Fit Current Display,75% (Compact - 405 × 720),85%,90% (Standard - 486 × 864),100% (1:1 Native - 540 × 960),115%,125% (2K - 675 × 1200), and140% (4K Ultra - 756 × 1344). - Instant Persistence: Your window scale is preserved in the DAW session state and saved in
ui_scale.txtso COM reopens at the exact size you chose.
Stage 1: Utility & Stereoize Imager
Prepares the stereo mix before saturation and dynamics, combining essential mastering utility calibration with a mono-compatible psychoacoustic Stereoize Imager.
| Control | Range | Description |
|---|---|---|
INPUT GAIN | -24.0 .. +24.0 dB | Calibrates incoming mix levels before downstream processing. |
PAN / BALANCE | 50L .. 50R | Constant-power stereo balance adjustment. |
STEREO WIDTH | 0% .. 200% | Continuous Mid/Side width (0% = mono, 100% = neutral, 200% = ultra-wide). |
STEREOIZE IMAGER | 0% .. 100% | Haas + all-pass spatial widening that sums cleanly to mono without cancellation. |
STEREOIZE DEPTH | 2.0 .. 25.0 ms | Tuning delay for psychoacoustic Haas width focus. |
BASS MONO FREQ | 20 .. 500 Hz | Crossover below which side information is folded into mono for punchy sub-bass. |
PHASE L/R Ø | Toggle | Independent polarity inversion for Left or Right channels. |
DC FILTER | Toggle | 5 Hz high-pass filter removing sub-audible DC offsets. |
Stage 2: Harmonic Saturator (Tape & Tube)
Infuses organic analog density, cohesion, and perceived loudness using 4 selectable non-linear modeling engines:
| Control | Range | Description |
|---|---|---|
MODELS | Tape • Tube • Transformer • Soft Clip | Analog transfer models: Warm Tape 30 ips, Triode Tube, Class-A Iron, or Soft Clip. |
SATURATION DRIVE | 0.0 .. +24.0 dB | Input gain driving the non-linear transfer function. |
HARMONIC COLOR | -100% (Even) .. +100% (Odd) | Morphs continuously between warm 2nd-order even harmonics and aggressive 3rd-order odd harmonics. |
TONE TILT | -6.0 .. +6.0 dB | Spectral tilt centered at 900 Hz to warm or brighten the harmonics. |
LOW BODY FOCUS | 20 .. 600 Hz | Low-frequency weighting to enrich bass fundamental weight. |
AUTO GAIN | Toggle | Maintains equal perceived volume as Drive is pushed. |
OUTPUT TRIM | -18.0 .. +12.0 dB | Post-saturation level alignment. |
DRY / WET MIX | 0% .. 100% | Parallel saturation blend for subtle warmth preservation. |
Stage 3: 6-Band Linear-Phase Dynamic Equalizer
High-precision 6-band mastering equalizer with selectable minimum-phase and linear-phase modes, real-time 60fps pre/post FFT analysis, and dynamic compression/expansion per band.
| Control | Range | Description |
|---|---|---|
FREQUENCY | 20 Hz .. 20 kHz | Center frequency (drag horizontally on graph or adjust knob). |
GAIN | -24.0 .. +24.0 dB | Band boost/cut (drag vertically on graph; double-click node to reset to 0 dB). |
QUALITY (Q) | 0.10 .. 18.0 | Bandwidth sharpness (mouse-wheel over node to widen or narrow). |
DYNAMIC EQ | -18.0 .. +18.0 dB | Dynamic threshold and ratio: automatically tames harsh frequencies or expands dull transients. |
FILTER SHAPES | 9 Shapes | Bell, Low Shelf, Low Cut, High Shelf, High Cut, Notch, Band Pass, Tilt Shelf, Flat-Top. |
FILTER SLOPES | 6 / 12 / 24 / 48 dB/oct | Steepness selection for shelves and high/low pass filters. |
ROUTING PLACEMENT | Stereo • Left • Right • Mid • Side | Target processing to Center (Mid) or Widening (Side) channels. |
EQ PRESETS | Dropdown Menu | Instant curves: Flat Neutral, Master Sculpt, Warm Analog, Vocal Air, Modern Smile. |
Stage 4: Master Bus Glue Compressor
Cohesive master bus compression equipped with three analog detector topologies and a real-time Gain Reduction history graph:
| Control | Range | Description |
|---|---|---|
TOPOLOGY MODES | SSL Bus VCA • Smooth Opto • Punchy FET | VCA for tight drum/master glue, Opto for vocal/acoustic leveling, FET for aggressive transient snap. |
THRESHOLD | -48.0 .. 0.0 dB | Signal level where compression begins. |
RATIO | 1.2:1 .. 20.0:1 | Compression slope intensity. |
ATTACK | 0.1 .. 100.0 ms | Speed of compression onset. |
RELEASE | 10 .. 1500 ms | Recovery speed (or toggle AUTO REL for program-dependent timing). |
SOFT KNEE | 0.0 .. 18.0 dB | Smooths the compression elbow around the threshold. |
SC HPF | 20 .. 400 Hz | Internal sidechain high-pass filter to prevent heavy bass from pumping the master. |
MAKE-UP GAIN | -12.0 .. +24.0 dB | Output level compensation (or toggle AUTO GAIN). |
PARALLEL MIX | 0% .. 100% | Blends dry and compressed signals for transparent New York-style mastering. |
Stage 5: Brickwall True-Peak Limiter & Dither
Final loudness maximizer with inter-sample peak (ISP) protection compliant with ITU-R BS.1770 standards:
| Control | Range | Description |
|---|---|---|
CHARACTER MODES | Transparent • Punchy • Loudness Max • Soft Clip | Tailors release envelope curvature and transient handling to your music genre. |
GAIN (BOOST) | -12.0 .. +24.0 dB | Drives input signal into the ceiling for target commercial loudness. |
OUTPUT CEILING | -12.0 .. 0.0 dBTP | Absolute ceiling limit (e.g. -1.0 dBTP for Spotify/Apple Music, -0.3 dBTP for CD/Club). |
RELEASE TIME | 1.0 .. 500.0 ms | Recovery timing (or engage IRC AUTO for intelligent adaptive release). |
LOOKAHEAD | 0.1 .. 5.0 ms | Anticipates fast transients for zero peak overshoot. |
STEREO LINK | 0% .. 100% | Dual-mono (0%) to fully linked stereo (100%) operation. |
TRANSIENT CLIP | 0% .. 100% | Pre-limiter soft clipper to round micro-peaks before brickwall limiting. |
TRUE PEAK | Toggle | 4x/8x oversampled inter-sample peak detection. |
TPDF DITHER | Off • 16-Bit • 24-Bit | Triangular probability density dither for final bit-depth reduction. |