Limit filter gains to -24dB

3 files changed, 7 insertions, 7 deletions

diff --git a/Alc/effects/echo.c b/Alc/effects/echo.c
index 3ad1e975..4a11d811 100644
--- a/Alc/effects/echo.c
+++ b/Alc/effects/echo.c
@@ -126,7 +126,7 @@ static ALvoid ALechoState_update(ALechoState *state, const ALCdevice *Device, co
 
     state->FeedGain = props->Echo.Feedback;
 
-    gain = minf(1.0f - props->Echo.Damping, 0.01f);
+    gain = minf(1.0f - props->Echo.Damping, 0.0625f); /* Limit -24dB */
     ALfilterState_setParams(&state->Filter, ALfilterType_HighShelf,
                             gain, LOWPASSFREQREF/frequency,
                             calc_rcpQ_from_slope(gain, 0.75f));
diff --git a/Alc/effects/equalizer.c b/Alc/effects/equalizer.c
index 13826a3b..36683d79 100644
--- a/Alc/effects/equalizer.c
+++ b/Alc/effects/equalizer.c
@@ -138,7 +138,7 @@ static ALvoid ALequalizerState_update(ALequalizerState *state, const ALCdevice *
      * filters' gain is for the reference frequency, which is the centerpoint
      * of the transition band.
      */
-    gain = sqrtf(props->Equalizer.LowGain);
+    gain = maxf(sqrtf(props->Equalizer.LowGain), 0.0625f); /* Limit -24dB */
     freq_mult = props->Equalizer.LowCutoff/frequency;
     ALfilterState_setParams(&state->filter[0][0], ALfilterType_LowShelf,
         gain, freq_mult, calc_rcpQ_from_slope(gain, 0.75f)
@@ -153,7 +153,7 @@ static ALvoid ALequalizerState_update(ALequalizerState *state, const ALCdevice *
         state->filter[0][i].a2 = state->filter[0][0].a2;
     }
 
-    gain = props->Equalizer.Mid1Gain;
+    gain = maxf(props->Equalizer.Mid1Gain, 0.0625f);
     freq_mult = props->Equalizer.Mid1Center/frequency;
     ALfilterState_setParams(&state->filter[1][0], ALfilterType_Peaking,
         gain, freq_mult, calc_rcpQ_from_bandwidth(
@@ -169,7 +169,7 @@ static ALvoid ALequalizerState_update(ALequalizerState *state, const ALCdevice *
         state->filter[1][i].a2 = state->filter[1][0].a2;
     }
 
-    gain = props->Equalizer.Mid2Gain;
+    gain = maxf(props->Equalizer.Mid2Gain, 0.0625f);
     freq_mult = props->Equalizer.Mid2Center/frequency;
     ALfilterState_setParams(&state->filter[2][0], ALfilterType_Peaking,
         gain, freq_mult, calc_rcpQ_from_bandwidth(
@@ -185,7 +185,7 @@ static ALvoid ALequalizerState_update(ALequalizerState *state, const ALCdevice *
         state->filter[2][i].a2 = state->filter[2][0].a2;
     }
 
-    gain = sqrtf(props->Equalizer.HighGain);
+    gain = maxf(sqrtf(props->Equalizer.HighGain), 0.0625f);
     freq_mult = props->Equalizer.HighCutoff/frequency;
     ALfilterState_setParams(&state->filter[3][0], ALfilterType_HighShelf,
         gain, freq_mult, calc_rcpQ_from_slope(gain, 0.75f)
diff --git a/Alc/effects/reverb.c b/Alc/effects/reverb.c
index 456b25dc..afae2943 100644
--- a/Alc/effects/reverb.c
+++ b/Alc/effects/reverb.c
@@ -1089,11 +1089,11 @@ static ALvoid ALreverbState_update(ALreverbState *State, const ALCdevice *Device
 
     // Calculate the master filters
     hfscale = props->Reverb.HFReference / frequency;
-    gainhf = maxf(props->Reverb.GainHF, 0.0001f);
+    gainhf = maxf(props->Reverb.GainHF, 0.0625f); /* Limit -24dB */
     ALfilterState_setParams(&State->Filter[0].Lp, ALfilterType_HighShelf,
                             gainhf, hfscale, calc_rcpQ_from_slope(gainhf, 0.75f));
     lfscale = props->Reverb.LFReference / frequency;
-    gainlf = maxf(props->Reverb.GainLF, 0.0001f);
+    gainlf = maxf(props->Reverb.GainLF, 0.0625f);
     ALfilterState_setParams(&State->Filter[0].Hp, ALfilterType_LowShelf,
                             gainlf, lfscale, calc_rcpQ_from_slope(gainlf, 0.75f));
     for(i = 1;i < 4;i++)