+ // Cut away everything under 150 Hz; we don't need it for voice,
+ // and it will reduce headroom and confuse the compressor.
+ // (In particular, any hums at 50 or 60 Hz should be dampened.)
+ locut.render(samples_out.data(), samples_out.size() / 2, 150.0 * 2.0 * M_PI / OUTPUT_FREQUENCY, 0.5f);
+