Fix modLfoToVol behavior

FluidSynth · Sep 8, 2024 · f79af51 · f79af51
1 parent 7f39048
commit f79af51
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/src/utils/fluid_conv.c b/src/utils/fluid_conv.c
@@ -113,7 +113,11 @@ fluid_cb2amp(fluid_real_t cb)
     /* minimum attenuation: 0 dB */
     if(cb < 0)
     {
-        return 1.0;
+        /* Issue #1374: it seems that by using modLfoToVolEnv, the attenuation can become negative and
+         * therefore the signal needs to be amplified.
+         * In such a rare case, calculate the attenuation on the fly.
+         */
+        return FULID_POW(10.0f, cb / -200.0f);
     }
 
     if(cb >= FLUID_CB_AMP_SIZE)