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Two bugs kept the v2 OLA path permanently disabled:
1. SpectrogramResourceManager::load_asset() never set spec.version from
SpecHeader::version — all .spec assets loaded with version=0, so
ola_mode was always false in the voice.
2. spectool analyze_audio() used non-overlapping chunks (stride=DCT_SIZE),
hamming_window_512, and hardcoded header.version=1 — OLA analysis was
never implemented in the encoder.
Fixes: propagate header->version in load_asset(); switch spectool to
OLA_HOP_SIZE stride, hann_window_512, and SPEC_VERSION_V2_OLA.
Regenerated all .spec files.
handoff(Gemini): OLA enc/dec chain now correct end-to-end. .spec files
are v2 (50% overlap, Hann). No API changes; 33/34 tests pass
(WavDumpBackendTest pre-existing failure unrelated).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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