tweak reasonable synth:
* prevent denormals / cut low volume * reduce default amplitude of fundamental
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@ -185,23 +185,26 @@ static void synthesize_sineP (RSSynthChannel* sc,
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for (i=0; i < n_samples; ++i) {
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float env = adsr_env(sc, note);
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if (sc->adsr_cnt[note] == 0) break;
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const float amp = vol * env;
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left[i] += amp * sinf(2.0 * M_PI * phase);
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left[i] += .300 * amp * sinf(2.0 * M_PI * phase * 2.0);
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left[i] += .150 * amp * sinf(2.0 * M_PI * phase * 3.0);
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left[i] += .080 * amp * sinf(2.0 * M_PI * phase * 4.0);
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//left[i] -= .007 * amp * sinf(2.0 * M_PI * phase * 5.0);
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//left[i] += .010 * amp * sinf(2.0 * M_PI * phase * 6.0);
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left[i] += .020 * amp * sinf(2.0 * M_PI * phase * 7.0);
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phase += fq;
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right[i] += amp * sinf(2.0 * M_PI * phase);
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right[i] += .300 * amp * sinf(2.0 * M_PI * phase * 2.0);
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right[i] += .150 * amp * sinf(2.0 * M_PI * phase * 3.0);
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right[i] -= .080 * amp * sinf(2.0 * M_PI * phase * 4.0);
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//right[i] += .007 * amp * sinf(2.0 * M_PI * phase * 5.0);
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//right[i] += .010 * amp * sinf(2.0 * M_PI * phase * 6.0);
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right[i] -= .020 * amp * sinf(2.0 * M_PI * phase * 7.0);
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const float amp = vol * env * .6;
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if (amp > 1e-10) {
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left[i] += amp * sinf(2.0 * M_PI * phase);
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left[i] += .300 * amp * sinf(2.0 * M_PI * phase * 2.0);
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left[i] += .150 * amp * sinf(2.0 * M_PI * phase * 3.0);
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left[i] += .080 * amp * sinf(2.0 * M_PI * phase * 4.0);
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//left[i] -= .007 * amp * sinf(2.0 * M_PI * phase * 5.0);
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//left[i] += .010 * amp * sinf(2.0 * M_PI * phase * 6.0);
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left[i] += .020 * amp * sinf(2.0 * M_PI * phase * 7.0);
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phase += fq;
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right[i] += amp * sinf(2.0 * M_PI * phase);
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right[i] += .300 * amp * sinf(2.0 * M_PI * phase * 2.0);
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right[i] += .150 * amp * sinf(2.0 * M_PI * phase * 3.0);
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right[i] -= .080 * amp * sinf(2.0 * M_PI * phase * 4.0);
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//right[i] += .007 * amp * sinf(2.0 * M_PI * phase * 5.0);
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//right[i] += .010 * amp * sinf(2.0 * M_PI * phase * 6.0);
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right[i] -= .020 * amp * sinf(2.0 * M_PI * phase * 7.0);
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} else {
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phase += fq;
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}
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if (phase > 1.0) phase -= 2.0;
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}
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sc->phase[note] = phase;
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