Preset, Source, And Operating-State Management

A preset is a complete operating state—not an EQ label.

It may change source, routing, coefficients, filters, delay, level, polarity, dynamics, limiter, mute, output, amplifier state, user controls, calls, alerts, and what returns after sleep or interruption.

Preset State Record

Layer	Record
Source	input, app, phone, projection, transport, normalization, source volume, call and prompt paths
DSP	matrix, summing coefficients, filters, delay, polarity, EQ, dynamics, limiter, mute, slew, output trim
Analog output	DAC or line-output level, amplifier gain, load, speaker protection, channel identity
User control	master volume, bass, sub, balance, fader, loudness, preset selector, restricted controls
Vehicle state	accessory, run, crank, stop-start, call, alert, disconnect, reconnect, sleep, wake, fault

Transition Testing

Test both the destination state and the path into and out of it:

state A steady
→ request state B
→ mute / slew / route transition
→ state B steady
→ interruption or failure
→ restored state and level

Capture source level, DSP meter points, analog output, mute, remote output, and audible transient on a common time base when possible.

Stored And Live Values

Separate:

design values stored in the approved release
live values altered by user controls or source software
temporary ducking, call, prompt, alert, protection, or service offsets
values retained through sleep or power cycle
values reset to a default on startup

A preset name on the screen does not prove that every live value matches the approved state.

Wondom Four-Output State Matrix

Preset	OUT 1	OUT 2	OUT 3	OUT 4
Stereo reference	left	right	mute	mute
Center demo	left	right	0.5L + 0.5R	mute
Ambience demo	left	right	mute	documented derived rear path
Protected service	low-level left	low-level right	mute	mute

Each preset also records limiter, mute, output level, source state, approved purpose, startup default, transition behavior, and cold-power restore.

Release-Blocking Findings

stale routing, trim, delay, limiter, or mute from the previous state
level jumps, pops, missing channels, or wrong source after a transition
user controls that exceed approved source, amplifier, or speaker limits
wrong state after cold boot, key cycle, reconnect, sleep, or wake
call, prompt, or alert paths that return to the wrong source or level