Changed logic of CC-74 Brightness

to affect sound only between 0 and 64 like real XG synthesizers affect sound only between 0 and 64.

3 files changed, 18 insertions, 0 deletions

diff --git a/src/adlmidi.cpp b/src/adlmidi.cpp
index 4744903..df00706 100644
--- a/src/adlmidi.cpp
+++ b/src/adlmidi.cpp
@@ -200,6 +200,13 @@ ADLMIDI_EXPORT void adl_setScaleModulators(ADL_MIDIPlayer *device, int smod)
     play->opl.ScaleModulators = play->m_setup.ScaleModulators;
 }
 
+ADLMIDI_EXPORT void adl_setFullRangeBrightness(struct ADL_MIDIPlayer *device, int fr_brightness)
+{
+    if(!device) return;
+    MIDIplay *play = reinterpret_cast<MIDIplay *>(device->adl_midiPlayer);
+    play->m_setup.fullRangeBrightnessCC74 = fr_brightness;
+}
+
 ADLMIDI_EXPORT void adl_setLoopEnabled(ADL_MIDIPlayer *device, int loopEn)
 {
     if(!device) return;
diff --git a/src/adlmidi_midiplay.cpp b/src/adlmidi_midiplay.cpp
index 901e6ea..7911adc 100644
--- a/src/adlmidi_midiplay.cpp
+++ b/src/adlmidi_midiplay.cpp
@@ -727,6 +727,7 @@ MIDIplay::MIDIplay(unsigned long sampleRate):
     //m_setup.SkipForward = 0;
     m_setup.loopingIsEnabled = false;
     m_setup.ScaleModulators     = -1;
+    m_setup.fullRangeBrightnessCC74 = false;
     m_setup.delay = 0.0;
     m_setup.carry = 0.0;
     m_setup.tick_skip_samples_delay = 0;
@@ -1544,6 +1545,15 @@ void MIDIplay::NoteUpdate(uint16_t MidCh,
             bool is_percussion = (MidCh == 9) || Ch[MidCh].is_xg_percussion;
             uint8_t brightness = is_percussion ? 127 : Ch[MidCh].brightness;
 
+            if(!m_setup.fullRangeBrightnessCC74)
+            {
+                // Simulate post-High-Pass filter result which affects sounding by half level only
+                if(brightness >= 64)
+                    brightness = 127;
+                else
+                    brightness *= 2;
+            }
+
             switch(opl.m_volumeScale)
             {
             case OPL3::VOLUME_Generic:
diff --git a/src/adlmidi_private.hpp b/src/adlmidi_private.hpp
index 312f462..8e5f060 100644
--- a/src/adlmidi_private.hpp
+++ b/src/adlmidi_private.hpp
@@ -792,6 +792,7 @@ public:
         //unsigned int SkipForward;
         bool    loopingIsEnabled;
         int     ScaleModulators;
+        bool    fullRangeBrightnessCC74;
 
         double delay;
         double carry;