This upload contains a short technical paper, associated scripts, and output tables for a reversible spectral construction involving three dimensionless mathematical constants. The work develops a carrier-based modulation model, derives the corresponding sideband structure, and provides reproducible numerical tests for the resulting lattice. The accompanying scripts generate the primary sidebands, spacing tables, residual comparisons, carrier-variant rankings, null-distribution outputs, beat-period calculations, and a small corpus-level residual comparison table. The purpose of the upload is to preserve the computational record, document the validation procedure, and make the numerical workflow available for independent inspection. The paper is exploratory and mathematical in scope. It distinguishes between exact identities, numerical proximity, computational support, and open interpretation. No claim of complete physical derivation is made. The material is provided as part of the ENSO Framework research programme for timestamping, reproducibility, and future reference. License: CC BY-NC-ND 4.0 For further information about the ENSO Framework, please contact Eric Needham:ensotheory1@gmail.com