Updated FAQ regarding Linux setting for fixing latency issue

Fixed FTGL font init code issue when it's disabled.
Minor label change to play stats

doc/faq.md

@@ -34,3 +34,37 @@ timidity -iA -B2,8 -Os -EFreverb=0
 ## What is the latency fix?
 The latency fix is no longer required since Piano Booster on Windows now includes the integrated FluidSynth sound generator which works in real-time and has low latency.
 Previously on windows the latency fix was required when using the MS GM Wavetable Synthesizer sound generator which has very high latency.
+
+## Linux latency issue
+If you experience latency in Linux, try the following steps, it is very likely to fix the problem:
+
+First, see what is your current latency output, using the following command:
+
+[my console ~]$ pacmd list-sinks | grep 'latency: [1-9]'
+
+You should see something like this:
+        current latency: 100,86 ms
+        fixed latency: 100,14 ms
+        
+Edit file (using sudo as needed):
+
+/etc/pulse/daemon.conf
+
+Locate the following lines, uncomment as needed, and adjust values as followed:
+
+default-fragments = 2
+
+default-fragment-size-msec = 5
+
+Save the file, and restart pulseaudio using this command:
+
+[my console ~]$ pulseaudio -k
+
+Check your latency again:
+
+[my console ~]$ pacmd list-sinks | grep 'latency: [1-9]'
+
+
+
+
+

src/Conductor.h

@@ -214,6 +214,8 @@ protected:
 
     eventBits_t m_realTimeEventBits; //used to signal real time events to the caller of task()
 
+    CRating m_rating;
+
     void outputSavedNotes();
 
     void resetWantedChord();
@@ -264,7 +266,6 @@ private:
         return m_followState;
     }
 
-    CRating m_rating;
     CQueue<CMidiEvent>* m_savedNoteQueue;
     CQueue<CMidiEvent>* m_savedNoteOffQueue;
     CMidiEvent m_nextMidiEvent;

src/Draw.cpp

@@ -39,6 +39,7 @@ int CDraw::m_forceCompileRedraw;
 
 QColor CDraw::color;
 
+#ifndef NO_USE_FTGL
 FTFont * setupFont() {
     FTFont * cacheFont = NULL;  //TBD should use singleton pattern or wrapper
     //if ( cacheFont == NULL ) {
@@ -70,6 +71,7 @@ FTFont * setupFont() {
     //}
     return cacheFont;
 }
+#endif
 
 CDraw::CDraw(CSettings* settings)
 #ifndef NO_USE_FTGL

src/GlView.cpp

@@ -223,7 +223,7 @@ void CGLView::drawOverallAccurracy() {
     int totalPlayed = m_rating->getPlayedNoteTally();
 
     x += 260;
-    renderText(x, y, 0, tr("Correct:"), m_timeRatingFont);
+    renderText(x, y, 0, tr("On Key:"), m_timeRatingFont);
     drawRatioBar(x + 70, y, 180, (int) totalPlayed - m_rating->getPlayedWrongNoteTally(), totalPlayed,
                  CColor(0.0, 1.0, 0.0), bgColor,
                  CColor(1.0 - bgColor.red, 1.0 - bgColor.green, 1.0 - bgColor.blue), true);

src/Song.cpp

@@ -202,6 +202,8 @@ void CSong::handleSpecialKey(CMidiEvent inputNote) {
         else if ( startStopSet.empty()) {
             playMusic(!playingMusic());
             songControlListener->playState(playingMusic());
+            m_rating.addPlayedWrongNoteTally(-this->startStopSet.size());
+            m_rating.addPlayedNoteTally(-this->startStopSet.size());
         }
         else if ( speedupSet.empty()) {
             //start the speeding up timer
@@ -213,11 +215,14 @@ void CSong::handleSpecialKey(CMidiEvent inputNote) {
                 speedDir = 1;
                 if (! speedCtrlTime.isActive() ) {
                     speedCtrlTime.start(500, this);
+
                 } else {
                     //speedDir = 0;
                     //speedCtrlTime.stop();
                 }
             }
+            //m_rating.addPlayedWrongNoteTally(-this->speedupSet.size());
+            m_rating.addPlayedNoteTally(-this->speedupSet.size());
         } else if ( speeddownSet.empty()) {
             //start the speeding up timer
             if ( speedDir == -1 ) {
@@ -232,6 +237,8 @@ void CSong::handleSpecialKey(CMidiEvent inputNote) {
                     //speedCtrlTime.stop();
                 }
             }
+            //m_rating.addPlayedWrongNoteTally(-this->speeddownSet.size());
+            m_rating.addPlayedNoteTally(-this->speeddownSet.size());
         }
     }
 }
@@ -251,9 +258,9 @@ void CSong::setSongControlListener(SongControlListener * listener) {
 
 void CSong::pianistInput(CMidiEvent inputNote) {
 
-    handleSpecialKey(inputNote);
-
     CConductor::pianistInput(inputNote);
+
+    handleSpecialKey(inputNote);
 }
 
 void CSong::setActiveHand(whichPart_t hand)