Advanced DSP Integration: Routing, Phase, Crossovers, Dynamics, And Verification

Pre-productionEpisode 332-48 minutesAdvanced

An advanced Wondom-centered video package that exposes the difference between routing and audio transport, coherent summing and headroom, delay and phase, electrical and acoustic crossovers, dynamics detectors and output ceilings, FIR/IIR tradeoffs, and final measured implementation.

Audience: experienced tuners, DSP builders, system designers, and technical viewers ready to move beyond menu-driven tuning

Primary lesson: Signal Flow, Routing, Summing, And Dynamics

Video Status: Pre-production

The finished video is not published yet. This page exposes the companion lesson, chapter plan, required footage, technical-review gate, and remaining release blockers without presenting a fake player or placeholder watch link.

Chapter Plan

1. Build The Four-Output Wondom Reference Project

Create left and right references, a derived-center path, and a rear-fill or dynamics path with named output roles.

Sources: /learn/dsp/signal-flow-routing-and-dynamics · /learn/system-design/vehicle-audio-layout-imaging-and-seat-coverage

2. Separate Control, Audio, And Clock Paths

Show why I2C or SPI control does not transport audio or synchronize multiple DSP sample clocks.

Sources: /learn/integration/vehicle-networks-dsp-control-and-retained-functions · /learn/dsp/digital-audio-transport-and-conversion

3. Make The Routing Matrix Explicit

Document every source, coefficient, mute, output, unit, and failure state instead of treating a routing screen as self-explanatory.

Sources: /encyclopedia/dsp/routing-matrix · /encyclopedia/dsp/signal-flow

4. Demonstrate Coherent Summing Headroom

Measure unity, minus-three-decibel, and half-scale coefficients with identical and uncorrelated inputs.

Sources: /encyclopedia/dsp/summing-mixing · /encyclopedia/dsp/headroom

5. Use Mute And Slew As State Controls

Compare hard parameter steps with controlled mute, safe update, and slew sequencing during source and preset transitions.

Sources: /encyclopedia/dsp/mute-slew · /encyclopedia/commissioning/preset-state-management

6. Separate Polarity, Delay, Phase, And Group Delay

Show why one polarity button, one distance value, or one impulse peak cannot replace frequency-dependent acoustic verification.

Sources: /learn/dsp/time-alignment · /encyclopedia/dsp/phase · /encyclopedia/dsp/group-delay

7. Electrical Filters Versus Acoustic Crossovers

Measure individual driver transfers and combined normal and reverse-polarity sums instead of trusting filter labels alone.

Sources: /learn/dsp/crossovers-and-eq · /encyclopedia/acoustics/acoustic-crossover · /encyclopedia/dsp/crossover-summation

8. All-Pass And Phase Correction Boundaries

Use all-pass filters only for a defined measured phase problem and verify magnitude, phase, group delay, and nearby-position behavior.

Sources: /encyclopedia/dsp/all-pass-filter · /learn/dsp/crossovers-and-eq

9. Dynamics Detector Versus Audible Path

Separate sidechain filtering, detector behavior, threshold, ratio, attack, release, makeup gain, and final output ceiling.

Sources: /encyclopedia/dsp/sidechain-detector · /encyclopedia/dsp/compressor · /encyclopedia/dsp/limiter

10. Limiter Threshold Is Not Speaker Safety

Carry converter, amplifier, electrical, thermal, excursion, enclosure, and duty-cycle limits into the protection design.

Sources: /learn/amplifiers/output-power-loads-and-driver-safety · /encyclopedia/dsp/limiter

11. Choose FIR Or IIR From The Problem

Compare recursive and feedforward structures, phase targets, latency, resource use, impulse behavior, and export verification without ranking one architecture universally.

Sources: /learn/dsp/fir-iir-and-room-correction · /encyclopedia/dsp/fir-filter · /encyclopedia/dsp/iir-filter

12. Export, Measure, Reload, And Release

Verify the live hardware result, preserve the project and parameter map, reload the known-good state, and run affected regression checks.

Sources: /learn/commissioning/audio-system-commissioning-handoff-and-regression-testing · /encyclopedia/commissioning/system-release-record

Required Shots

Wondom 2-input and 4-output hardware identification
SigmaStudio project showing named left, right, center, and rear or dynamics paths
linear matrix coefficients and measured coherent sum
hard parameter step compared with mute or slew transition
polarity, delay, phase, and group-delay traces on matched axes
individual driver and crossover-sum measurements
normal and reverse-polarity crossover comparison
all-pass filter before-and-after magnitude and phase
compressor detector and audible-path meters shown separately
limiter threshold compared with actual output and downstream limits
IIR and resource-qualified FIR transfer comparison
exported project, live readback, known-good reload, and regression evidence

Required Graphics

control bus versus audio bus versus sample-clock diagram
four-output Wondom reference project map
matrix coefficient and coherent-sum table
mute, safe-update, and slew state diagram
polarity versus delay versus phase versus group-delay card
electrical filter and acoustic crossover overlay
all-pass magnitude and phase illustration
detector path versus audible path diagram
limiter threshold versus physical-system limits diagram
FIR versus IIR architecture and latency map
DSP project and controller-version contract
known-good reload and regression flowchart

Safety Card

Characterize the Wondom and DSP project at protected line level first. Keep amplifiers muted until routes, filters, output levels, mutes, and transitions are proven, then increase acoustic level only under the applicable electrical, loudspeaker, structural, and hearing limits.

Verify the exact Wondom board revision, power, input and output limits, self-boot state, and control interface before filming.
Keep downstream amplifiers disabled while testing routing, matrices, mutes, parameter updates, and unexpected boot states.
Use safe differential or isolated measurement methods for any amplifier output shown later in the video.
Stop for unexpected routing, full-scale output, pops, unstable communication, wrong project maps, overheating, protection, or mechanical distress.
Do not present a limiter, floating-point path, or clean electrical transfer as proof of complete speaker or hearing safety.

Technical Review

Status: pending

Verify the exact SigmaStudio compiler result, parameter addresses, data formats, sample rate, instruction use, and memory use for the shown project.
Verify every matrix coefficient in both linear and decibel form and confirm the measured coherent result.
Confirm the signal-flow location of every meter, detector, mute, limiter, and output trim shown.
Confirm time, phase, group-delay, and crossover conclusions from traces with a valid timing reference and matched processing settings.
Confirm the FIR example is actually supported by the compiled project and label its length, latency, resources, and phase design.
Verify live hardware output after export and after a known-good reload.
Remove any implication that the Wondom is a surround decoder, network analyzer, calibrated safety instrument, or long-FIR engine without proof.

Release Blockers

identify the exact Wondom hardware revision and accessible control, boot, and audio connections
compile and preserve the exact SigmaStudio reference project and parameter map
capture verified line-level matrix, mute, slew, dynamics, and filter measurements
capture acoustic crossover and time-domain measurements with a valid timing reference
prove the selected FIR example fits the hardware resource and latency budget
complete known-good reload and regression evidence
technical review of every equation, address, meter location, trace, and on-screen claim

Reference Material

Planned Shorts

Why Two Unity Inputs Add Six Decibels — planned
I2C Controls The DSP But Does Not Carry The Audio — planned
Limiter Threshold Is Not A Speaker-Safety Number — planned
Electrical LR24 Does Not Guarantee Acoustic LR4 — planned
FIR Does Not Automatically Mean Linear Phase — planned

Production Source

content-work/video-packages/advanced-dsp-integration.md

The repository production source contains the working script, shot plan, graphics list, and shoot-day records. Public claims must be updated from the recorded evidence before the status changes to published.