fix #87066: Incorrect Pitch When Alternate Values Used for 'Scale Tune'

musescore · Feb 21, 2018 · 3517971 · 3517971
1 parent 8915b35
commit 3517971
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Showing 2 changed files with 33 additions and 18 deletions.
diff --git a/fluid/voice.cpp b/fluid/voice.cpp
@@ -504,7 +504,7 @@ void Voice::write(unsigned n, float* out, float* reverb, float* chorus)
       float cent = pitch + modlfo_val * modlfo_to_pitch
                    + viblfo_val * viblfo_to_pitch
                    + modenv_val * modenv_to_pitch;
-      phase_incr = _fluid->ct2hz_real(cent) / root_pitch;
+      phase_incr = _fluid->ct2hz_real(cent) / root_pitch_hz;
       }
 
       /* if phase_incr is not advancing, set it to the minimum fraction value (prevent stuckage) */
@@ -749,17 +749,6 @@ void Voice::voice_start()
             dest_gen->mod      += modval;
             }
 
-     /* The GEN_PITCH is a hack to fit the pitch bend controller into the
-      * modulator paradigm.  Now the nominal pitch of the key is set.
-      * Note about SCALETUNE: SF2.01 8.1.3 says, that this generator is a
-      * non-realtime parameter. So we don't allow modulation (as opposed
-      * to _GEN(voice, GEN_SCALETUNE) When the scale tuning is varied,
-      * one key remains fixed. Here C3 (MIDI number 60) is used.
-      */
-
-      gen[GEN_PITCH].val = _noteTuning + _fluid->getPitch(60) + (gen[GEN_SCALETUNE].val * .01 *
-               (_fluid->getPitch(key) - _fluid->getPitch(60)));
-
      /* Now the generators are initialized, nominal and modulation value.
       * The voice parameters (which depend on generators) are calculated
       * with update_param. Processing the list of generator
@@ -796,6 +785,30 @@ void Voice::voice_start()
       status = FLUID_VOICE_ON;
       }
 
+//---------------------------------------------------------
+//   fluid_voice_calculate_gen_pitch
+//---------------------------------------------------------
+
+void Voice::calculate_gen_pitch()
+      {
+      float x;
+     /* The GEN_PITCH is a hack to fit the pitch bend controller into the
+      * modulator paradigm.  Now the nominal pitch of the key is set.
+      * Note about SCALETUNE: SF2.01 8.1.3 says, that this generator is a
+      * non-realtime parameter. So we don't allow modulation (as opposed
+      * to _GEN(voice, GEN_SCALETUNE) When the scale tuning is varied,
+      * one key remains fixed. Here C3 (MIDI number 60) is used.
+      */
+      //if (channel->tuning != 0) {
+            /* pitch(scalekey) + scale * (pitch(key) - pitch(scalekey)) */
+      x = _fluid->getPitch((int)(root_pitch / 100.0f));
+      gen[GEN_PITCH].val = _noteTuning + (x + (gen[GEN_SCALETUNE].val / 100.0f * (_fluid->getPitch(key) - x)));
+      //      }
+      //else {
+      //      gen[GEN_PITCH].val = _noteTuning + (gen[GEN_SCALETUNE].val * (key - root_pitch / 100.0f) + root_pitch);
+      //      }
+      }
+
 /*
  * calculate_hold_decay_frames
  */
@@ -927,10 +940,11 @@ void Voice::update_param(int _gen)
                               }
                         else {
                               root_pitch = sample->origpitch * 100.0f - sample->pitchadj;
-                        }
-                        root_pitch = _fluid->ct2hz(root_pitch);
-                        if (sample->samplerate != 0)
-                              root_pitch *= (float) _fluid->sample_rate / sample->samplerate;
+                              }
+                        root_pitch_hz = _fluid->ct2hz(root_pitch);
+                        root_pitch_hz *= (float) _fluid->sample_rate / sample->samplerate;
+                        /* voice pitch depends on voice root_pitch, so calculate voice pitch now */
+                        calculate_gen_pitch();
                         }
                   break;
 

diff --git a/fluid/voice.h b/fluid/voice.h
@@ -91,7 +91,7 @@ class Voice
 					           have to be checked. */
 	unsigned int ticks;
 
-	qreal amp;                       /* the linear amplitude */
+	float amp;                       /* the linear amplitude */
 	Phase phase;                     // the phase of the sample wave
 
 	// Temporary variables used in write()
@@ -104,7 +104,7 @@ class Voice
 	float attenuation;        /* the attenuation in centibels */
 	float min_attenuation_cB; /* Estimate on the smallest possible attenuation
 					          * during the lifetime of the voice */
-	float root_pitch;
+	float root_pitch, root_pitch_hz;
 
 	/* sample and loop start and end points (offset in sample memory).  */
 	int start;
@@ -219,6 +219,7 @@ class Voice
       void noteoff();
       void kill_excl();
       int calculate_hold_decay_frames(int gen_base, int gen_key2base, int is_decay);
+      void calculate_gen_pitch();
 
       /* A voice is 'ON', if it has not yet received a noteoff
        * event. Sending a noteoff event will advance the envelopes to