Pan Law / Stereo Balance Level 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

t5-106

Effect

Computation or source lookup only

Input and validation requirements

Hard-left and hard-right positions produce a zero linear gain on one channel. Converting that channel to dB requires log10(0), so a finite numeric dB output is undefined; the instrument must explicitly return -Infinity or reject the result. The specification also does not state the pan-position convention or explicitly define the linear-to-dB conversion.

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": {
    "pan_position_degrees": 0,
    "pan_law_db": -3
  },
  "expected_outputs": {
    "left_gain_linear": 0.70794578,
    "right_gain_linear": 0,
    "left_gain_db": -3,
    "right_gain_db": "-Infinity"
  },
  "working": "panLawGain=10^(-3/20)=10^(-0.15)=0.70794578. theta=0°. L=cos(0°)*0.70794578=1*0.70794578=0.70794578. R=sin(0°)*0.70794578=0*0.70794578=0. 20*log10(0.70794578)=-3 dB. 20*log10(0)=-Infinity 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-tranche5/tranche5-results.json