Improved responsiveness when pressing play/cue button at while track …

…is hold on a beat

src/engine/controls/clockcontrol.cpp

@@ -11,6 +11,8 @@ namespace {
 constexpr double kBlinkInterval = 0.20; // LED is on 20% of the beat period
 constexpr double kStandStillTolerance =
         0.005; // (seconds) Minimum change, to he last evaluated position
+constexpr double kSignificiantRateThreshold =
+        0.1; // If rate is significiant, update indicator also inside standstill tolerance
 } // namespace
 
 ClockControl::ClockControl(const QString& group, UserSettingsPointer pConfig)
@@ -65,8 +67,10 @@ void ClockControl::updateIndicators(const double dRate,
     */
 
     // No position change since last indicator update (e.g. deck stopped) -> No indicator update needed
+    // The kSignificiantRateThreshold condition ensures an immidiate indicator update, when the play/cue button is pressed
     if ((currentSample <= (m_lastEvaluatedSample + kStandStillTolerance * sampleRate)) &&
-            (currentSample >= (m_lastEvaluatedSample - kStandStillTolerance * sampleRate))) {
+            (currentSample >= (m_lastEvaluatedSample - kStandStillTolerance * sampleRate)) &&
+            fabs(dRate <= kSignificiantRateThreshold)) {
         return;
     }