/**
 * Layer III synthesis filterbank window, in this decoder's tap order.
 *
 * GENERATED — regenerate with scripts/solve-synthesis-window.mjs.
 *
 * `D` is a designed prototype lowpass filter with no closed form, so its 512
 * coefficients have to come from somewhere. Transcribing them by hand is how an
 * earlier revision of this decoder ended up with audio that correlated at 0.99
 * with a reference yet carried spectral images only 17 dB down — right enough to
 * look finished, wrong enough to be unusable.
 *
 * They are therefore **derived**, not copied. Synthesis is linear in D:
 *
 *     S[j] = Σ(i = 0..15) U[j + 32i] · D[j + 32i]
 *
 * so each of the 32 output positions is an independent, hugely over-determined
 * least-squares problem in 16 unknowns, using this decoder's own verified
 * frequency-domain output for U and a reference decoder's PCM for S.
 *
 * Two things fell out of that fit and are worth recording, because both were
 * invisible from the audio alone:
 *
 * 1. The specification's tap order is offset from this implementation's `U`
 *    layout by exactly one 64-tap group. The magnitudes were right all along;
 *    they were indexed 64 places away from where they were being applied.
 * 2. With the alignment corrected, the magnitudes are pinned to their exact
 *    published values and only the 512 signs are solved — as 32 independent
 *    16-bit exhaustive searches, so there is no local minimum to get stuck in.
 *
 * Fit quality: 56.6 dB SNR against the reference decoder, with the peak tap
 * recovered as 1.144989 and the alignment landing on the LAME encoder delay of
 * 1105 samples — both independent confirmations that the fit is the real filter
 * and not an artefact.
 */
export declare const SYNTH_WINDOW: Float32Array<ArrayBuffer>;