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z�Roundtrip SNR tests for the orion_sdr Python extension.
Each test modulates a tone, demodulates it, and asserts that SNR in the
recovered audio exceeds a minimum threshold. Thresholds match the Rust
roundtrip tests in src/tests/roundtrip.rs.
N)�FS� real_tone�snr_db�taili � c �� � Rp RpRp\ P ! \ V 4 Uu. uF&