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Ohmic Audio

DSP Encyclopedia

Filter Architecture And Correction

IIR Filter

Recursive filtering, poles, zeros, stability, precision, state, phase, and acoustic verification.

FIR Filter

Feedforward taps, convolution, phase choices, scaling, resources, and latency.

Convolution

Impulse-response processing, direct and partitioned implementations, scaling, and model limits.

Mixed-Phase Correction

Causal, finite, regularized magnitude-and-phase correction with spatial and hardware constraints.

Automated Correction

Product-specific measurement, target, optimization, export, and independent verification.

Signal Flow, Routing, And Dynamics

Signal Flow

Audio, control, detector and meter paths in their actual processing order.

Routing Matrix

Input-to-output coefficients, mutes, presets and physical output identity.

Mute And Slew

Clickless switching, crossfades, preset sequencing and fail-safe states.

Compressor

Threshold, ratio, knee, attack, release and makeup gain.

Limiter

Overshoot, achieved ceiling, analog boundaries and protection limits.

Core Signal-Level Concepts

Gain Structure

Coordinate level through the source, DSP, and amplifier so each stage receives a strong clean signal without overload.

Clipping

Identify the first overloaded stage instead of assuming every distorted waveform was created by the amplifier.

Headroom

Name the stage, reference, measurement type, and clean ceiling before quoting a margin.

Crossovers, Filters, And Equalization

Crossover

Assign safe driver bands and distinguish software settings from the measured acoustic handoff.

Filter Slope

Separate order, alignment, corner level, phase, and final acoustic attenuation.

Acoustic Crossover

Build complementary installed slopes and verify magnitude, phase, reverse null, and coverage.

Equalization

Classify the measured cause before choosing a cut, boost, shelf, notch, or no-EQ action.

Q Factor

Understand filter concentration, bandwidth, gain dependence, and implementation differences.

All-Pass Filter

Shape phase and group delay without intentionally changing individual magnitude.

Target Curve

Define the response reference, measurement context, match range, and seating goal.

Guided Lesson

Apply the entire crossover, coverage, target, EQ, and verification workflow.

Timing, Phase, And Acoustic Integration

Polarity

Waveform sign and electrical orientation, separated from delay and frequency-dependent phase.

Phase

Relative cycle position, wrapping, timing reference, and crossover interpretation.

Delay

Distance conversion, sample resolution, phase relationship, and acoustic verification.

Impulse Response

Direct arrival, polarity, reflections, timing reference, windowing, and driver-dependent peak shape.

Group Delay

Phase slope, bulk delay, minimum and excess delay, and context-aware interpretation.

Acoustic Center

Effective band- and geometry-dependent timing origin rather than one fixed physical point.

Crossover Summation

Acoustic slopes, relative phase, reverse-null verification, and lobe behavior.

Related Foundations