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Ohmic Audio

Source Playback Signal-Path Workflow

Use one sheet per vehicle and source-system revision. Keep the media, connection, volume states, physical output, interrupts, and approved limits tied to the same version.

Project And Source Goals

Vehicle / trim / audio option:

Required source modes:

Required calls / prompts / alerts:

Target channels / outputs / zones:

Latency / quality / reliability goal:

Reference Content

Test file / tone / sweep name:

Format / sample rate / bit depth:

Peak / RMS / crest factor:

App / local file / stream source:

Normalization / EQ / loudness state:

Source Device And Software

Phone / player / head unit:

Operating system / firmware:

App / version / account mode:

Permissions / audio settings:

Update date / known changes:

Source Path Map

Media → app / decoder:

Codec / PCM / sample rate:

Transport / connection:

Host / receiver / mixer / SRC:

DAC / analog output / next input:

Complete Volume State

App volume / normalization:

Phone or OS media volume:

Projection / Bluetooth / USB state:

Head-unit master / source / sub:

DSP trims / amplifier gain:

Head-Unit Or Analog Output

Output type / channel / topology:

Load / next-stage input range:

Last-clean volume / Vrms:

Noise / response / distortion:

Mute / start / stop behavior:

Bluetooth Classic

Source / sink / firmware:

A2DP / AVRCP / HFP state:

Negotiated codec / configuration:

Latency / dropouts / radio state:

Media-to-call transition:

Bluetooth LE Audio

Controller / host support:

Source and sink roles:

Profiles / services / LC3 state:

Unicast / multi-stream / broadcast:

Classic fallback behavior:

USB

Port / cable / adapters / hub:

Host / device / power roles:

Charging / storage / projection / UAC:

Channels / formats / clock / SRC:

Ground noise / reconnect / heat:

Projection

CarPlay / Android Auto / AAOS:

Wired / wireless session:

Phone and host responsibilities:

Media / call / navigation routes:

Fallback / reconnect / restore:

Audio Focus And Priority

Media behavior:

Navigation behavior:

Call / assistant behavior:

Alert / emergency / safety behavior:

Duck amount / timing / restore:

Cross-Source Comparison

Common physical reference point:

Level-match method:

Response / noise / distortion:

Latency / channel map:

Repeatability / failure notes:

Approved Operating States

Maximum clean source state:

Calibration state:

Maximum user state:

Interrupt / call / prompt state:

Approved DSP preset / date:

Final Recovery And Signoff

Cold boot / accessory-to-run:

Key cycle / stop-start / sleep:

Disconnect / reconnect / app crash:

Retained vehicle functions:

Reviewer / revision / next recheck:

Stop And Re-Test If