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Monty authored
All new LSP->freq envelope curve computation code. It turns out that LSP->LPC using the impulse response algorithm is *very* sensitive to noise, and doubles really are necessary. Unfortunate, that. Reimplmented the code with a direct LSP->curve computation, skipping the LPC intermediary step. This also eliminates any need for the LPC or iFFT code in decode/synthesis. Monty svn path=/trunk/vorbis/; revision=597
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