diff --git a/source/SoundStretch/RunParameters.cpp b/source/SoundStretch/RunParameters.cpp
index 495478f..537e140 100644
--- a/source/SoundStretch/RunParameters.cpp
+++ b/source/SoundStretch/RunParameters.cpp
@@ -199,7 +199,7 @@ void RunParameters::throwLicense() const
     ST_THROW_RT_ERROR(licenseText);
 }
 
-float RunParameters::parseSwitchValue(const STRING& str) const
+double RunParameters::parseSwitchValue(const STRING& str) const
 {
     int pos;
 
@@ -211,7 +211,7 @@ float RunParameters::parseSwitchValue(const STRING& str) const
     }
 
     // Read numerical parameter value after '='
-    return (float)stof(str.substr(pos + 1).c_str());
+    return stof(str.substr(pos + 1).c_str());
 }
 
 
diff --git a/source/SoundStretch/RunParameters.h b/source/SoundStretch/RunParameters.h
index 2db36b4..f57364c 100644
--- a/source/SoundStretch/RunParameters.h
+++ b/source/SoundStretch/RunParameters.h
@@ -48,17 +48,17 @@ private:
     void throwLicense() const;
     void parseSwitchParam(const STRING& str);
     void checkLimits();
-    float parseSwitchValue(const STRING& tr) const;
+    double parseSwitchValue(const STRING& tr) const;
 
 public:
     STRING inFileName;
     STRING outFileName;
-    float tempoDelta{ 0 };
-    float pitchDelta{ 0 };
-    float rateDelta{ 0 };
+    double tempoDelta{ 0 };
+    double pitchDelta{ 0 };
+    double rateDelta{ 0 };
     int   quick{ 0 };
     int   noAntiAlias{ 0 };
-    float goalBPM{ 0 };
+    double goalBPM{ 0 };
     bool  detectBPM{ false };
     bool  speech{ false };
 
diff --git a/source/SoundStretch/main.cpp b/source/SoundStretch/main.cpp
index 59d49e8..641fe10 100644
--- a/source/SoundStretch/main.cpp
+++ b/source/SoundStretch/main.cpp
@@ -145,9 +145,9 @@ static void setup(SoundTouch& soundTouch, const WavInFile& inFile, const RunPara
 #endif
         // print processing information only if outFileName given i.e. some processing will happen
         fprintf(stderr, "Processing the file with the following changes:\n");
-        fprintf(stderr, "  tempo change = %+g %%\n", params.tempoDelta);
-        fprintf(stderr, "  pitch change = %+g semitones\n", params.pitchDelta);
-        fprintf(stderr, "  rate change  = %+g %%\n\n", params.rateDelta);
+        fprintf(stderr, "  tempo change = %+lg %%\n", params.tempoDelta);
+        fprintf(stderr, "  pitch change = %+lg semitones\n", params.pitchDelta);
+        fprintf(stderr, "  rate change  = %+lg %%\n\n", params.rateDelta);
         fprintf(stderr, "Working...");
     }
     else
@@ -240,7 +240,7 @@ static void detectBPM(WavInFile& inFile, RunParameters& params)
 
     if (bpmValue > 0)
     {
-        fprintf(stderr, "Detected BPM rate %.1f\n\n", bpmValue);
+        fprintf(stderr, "Detected BPM rate %.1lf\n\n", bpmValue);
     }
     else
     {
@@ -252,7 +252,7 @@ static void detectBPM(WavInFile& inFile, RunParameters& params)
     {
         // adjust tempo to given bpm
         params.tempoDelta = (params.goalBPM / bpmValue - 1.0f) * 100.0f;
-        fprintf(stderr, "The file will be converted to %.1f BPM\n\n", params.goalBPM);
+        fprintf(stderr, "The file will be converted to %.1lf BPM\n\n", params.goalBPM);
     }
 }