Signal roles and levels
- Focusrite: balanced and unbalanced audioChannel roles are separate from connector appearance.
- Focusrite: mic, line and instrument levelIts mono line inputs, stereo headphone output and input-level distinctions are not a specification for every manufacturer.
- Focusrite: little or no line signalStereo-to-balanced-mono cancellation can be program-dependent; no fixed loss in dB is predicted.
Headset wiring
- Android: headset plug specificationCTIA and OMTP microphone/ground contact distinction. Not a guarantee of proprietary remotes or console support.
- Android: headset jack specificationUse receiving jack and adapter documentation rather than infer contact order by brand.
Microphone power
- RØDE: plug-in powerA suitable power interface matters; product voltages are not generalized to all microphones.
- beyerdynamic: adapters and phantom powerExact connector and power requirements remain model-specific.
- Harman: phantom power and microphonesConsider the complete microphone/cable/input route, not capsule type alone.
Noise isolation
- Focusrite: monitor hum/noiseControlled battery and connection comparisons support sequencing, not a browser diagnosis.
- Sennheiser: hum/buzz troubleshootingKeep signal-side investigation separate from electrical safety and protective earth.
Decision rules and exclusions
The Signal Path Checker compares declared channel roles, then requires level and wiring evidence. The Headset Selector specifies adapter function/direction and unresolved TRRS order. The Power Preflight requires a documented power system and exact electrical path. The Hum Planner ranks one-variable observations without assigning a measured root cause.
No compatibility score, exact device database, automatic port detection, live audio capture, generated test signal, fixed cancellation amount, universal pin-shorting recipe, mains earth-lift instruction or safety certification is provided. Contradictory or unknown evidence does not become a confirmed fit. A documented converter route remains conditional because its exact specifications are not independently checked.