Gain Staging / dB Sum Calculator implementation

Binding contract

This record describes what an executable surface must bind and validate. It does not claim that a public calculator, package, or production route is deployed.

Record owner

Guth Instruments

Lifecycle

verified-clean

Evidence ID

t4-037

Effect

Computation or source lookup only

Input and validation requirements

An empty source list produces log10(0), which is undefined. The instrument must reject this input or explicitly represent the result as undefined rather than returning a finite summed level.

Required corrections

No binding erratum is attached to this unique-name record. Implementers must still preserve the declared units, domain, and failure behavior.

Inspectable interface fixture

The sample below is evidence for interface and validation tests, not a production implementation.

{
  "inputs": {
    "source_levels_db": [
      0,
      0
    ],
    "correlation_assumption": "uncorrelated"
  },
  "expected_outputs": {
    "summed_level_db": 3.0103
  },
  "working": "Convert each level to linear power: 10^(0/10)=1 and 10^(0/10)=1. Sum powers: 1+1=2. Convert back: 10log10(2)=3.0103 dB."
}

Other records

Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

• VERIFIED_LEDGER.json
• evidence-tranche4/tranche4-results.json