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torlando-techandClaude Opus 4.7
e92ddcf2f3
Codec2-3200 is a SPEECH codec — pure-tone round-trip retains only ~12% of input RMS. The 1kHz-sine variant of the LXST QoS test worked but tested the codec on its worst-case input. Switch I2SCapture::setInjectSine to generate a synthesized voice- like signal instead of a pure sine: F1 at the freq arg (default 730Hz, "ah" formant), F2 at 1.5·F1, F3 at 3.3·F1, all summed with weights 0.55 / 0.30 / 0.15, modulated by a 120Hz amplitude envelope that emulates glottal pulses. Phase-continuous so the encoder never sees a discontinuity. Codec2 retains far more energy on this content (~5400 RMS vs the ~1900 the sine produced) — same gate, much wider quality margin. Validated end-to-end: pyxis_rms=4378 bot_rms=5438 decode_fail=0+0 PASS The LXST harness drives this via the same T:CALL_INJECT command (API unchanged); only the in-firmware generator changed. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>