Vendor SAPI4 runtime/voices, Flextalk cabinet, NetTTS reference (standalone, no online deps)

third_party/nettss-reference/vox_parser.hpp

@@ -0,0 +1,8 @@
+#pragma once
+#include <string>
+
+// Transform plain text into FlexTalk VOX style with vendor tags.
+// - Wraps with \!wH1 ... \!wH0 (trailing space after \!wH0 for safety)
+// - Inserts \!br at sentence ends & cadence points
+// - Uses a generic prosody engine (no word-specific hacks)
+std::wstring vox_process(const std::wstring& in, bool wrap_vox_tags);