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tweak reasonable synth:

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* prevent denormals / cut low volume
* reduce default amplitude of fundamental
This commit is contained in:
Robin Gareus 2014-01-20 21:42:47 +01:00
parent 224b44c6e2
commit 114997b7e6
1 changed files with 20 additions and 17 deletions
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37
libs/plugins/reasonablesynth.lv2/rsynth.c
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@ -185,23 +185,26 @@ static void synthesize_sineP (RSSynthChannel* sc,
for (i=0; i < n_samples; ++i) { for (i=0; i < n_samples; ++i) {
float env = adsr_env(sc, note); float env = adsr_env(sc, note);
if (sc->adsr_cnt[note] == 0) break; if (sc->adsr_cnt[note] == 0) break;
const float amp = vol * env; const float amp = vol * env * .6;
if (amp > 1e-10) {
left[i] += amp * sinf(2.0 * M_PI * phase); left[i] += amp * sinf(2.0 * M_PI * phase);
left[i] += .300 * amp * sinf(2.0 * M_PI * phase * 2.0); left[i] += .300 * amp * sinf(2.0 * M_PI * phase * 2.0);
left[i] += .150 * amp * sinf(2.0 * M_PI * phase * 3.0); left[i] += .150 * amp * sinf(2.0 * M_PI * phase * 3.0);
left[i] += .080 * amp * sinf(2.0 * M_PI * phase * 4.0); left[i] += .080 * amp * sinf(2.0 * M_PI * phase * 4.0);
//left[i] -= .007 * amp * sinf(2.0 * M_PI * phase * 5.0); //left[i] -= .007 * amp * sinf(2.0 * M_PI * phase * 5.0);
//left[i] += .010 * amp * sinf(2.0 * M_PI * phase * 6.0); //left[i] += .010 * amp * sinf(2.0 * M_PI * phase * 6.0);
left[i] += .020 * amp * sinf(2.0 * M_PI * phase * 7.0); left[i] += .020 * amp * sinf(2.0 * M_PI * phase * 7.0);
phase += fq; phase += fq;
right[i] += amp * sinf(2.0 * M_PI * phase); right[i] += amp * sinf(2.0 * M_PI * phase);
right[i] += .300 * amp * sinf(2.0 * M_PI * phase * 2.0); right[i] += .300 * amp * sinf(2.0 * M_PI * phase * 2.0);
right[i] += .150 * amp * sinf(2.0 * M_PI * phase * 3.0); right[i] += .150 * amp * sinf(2.0 * M_PI * phase * 3.0);
right[i] -= .080 * amp * sinf(2.0 * M_PI * phase * 4.0); right[i] -= .080 * amp * sinf(2.0 * M_PI * phase * 4.0);
//right[i] += .007 * amp * sinf(2.0 * M_PI * phase * 5.0); //right[i] += .007 * amp * sinf(2.0 * M_PI * phase * 5.0);
//right[i] += .010 * amp * sinf(2.0 * M_PI * phase * 6.0); //right[i] += .010 * amp * sinf(2.0 * M_PI * phase * 6.0);
right[i] -= .020 * amp * sinf(2.0 * M_PI * phase * 7.0); right[i] -= .020 * amp * sinf(2.0 * M_PI * phase * 7.0);
} else {
phase += fq;
}
if (phase > 1.0) phase -= 2.0; if (phase > 1.0) phase -= 2.0;
} }
sc->phase[note] = phase; sc->phase[note] = phase;