Remove always true argument of ExportPlugin::CreateMixer

src/export/Export.cpp

@@ -221,7 +221,7 @@ std::unique_ptr<Mixer> ExportPlugin::CreateMixer(const TrackList &tracks,
          double startTime, double stopTime,
          unsigned numOutChannels, size_t outBufferSize, bool outInterleaved,
          double outRate, sampleFormat outFormat,
-         bool highQuality, MixerSpec *mixerSpec)
+         MixerSpec *mixerSpec)
 {
    WaveTrackConstArray inputTracks;
 
@@ -241,7 +241,7 @@ std::unique_ptr<Mixer> ExportPlugin::CreateMixer(const TrackList &tracks,
                   startTime, stopTime,
                   numOutChannels, outBufferSize, outInterleaved,
                   outRate, outFormat,
-                  highQuality, mixerSpec);
+                  true, mixerSpec);
 }
 
 void ExportPlugin::InitProgress(std::unique_ptr<ProgressDialog> &pDialog,

src/export/Export.h

@@ -139,7 +139,7 @@ protected:
          double startTime, double stopTime,
          unsigned numOutChannels, size_t outBufferSize, bool outInterleaved,
          double outRate, sampleFormat outFormat,
-         bool highQuality = true, MixerSpec *mixerSpec = NULL);
+         MixerSpec *mixerSpec);
 
    // Create or recycle a dialog.
    static void InitProgress(std::unique_ptr<ProgressDialog> &pDialog,

src/export/ExportCL.cpp

@@ -503,7 +503,6 @@ ProgressResult ExportCL::Export(AudacityProject *project,
                             true,
                             rate,
                             floatSample,
-                            true,
                             mixerSpec);
 
    size_t numBytes = 0;

src/export/ExportFFmpeg.cpp

@@ -1015,7 +1015,7 @@ ProgressResult ExportFFmpeg::Export(AudacityProject *project,
    auto mixer = CreateMixer(tracks, selectionOnly,
       t0, t1,
       channels, pcmBufferSize, true,
-      mSampleRate, int16Sample, true, mixerSpec);
+      mSampleRate, int16Sample, mixerSpec);
 
    auto updateResult = ProgressResult::Success;
    {

src/export/ExportFLAC.cpp

@@ -374,7 +374,7 @@ ProgressResult ExportFLAC::Export(AudacityProject *project,
    auto mixer = CreateMixer(tracks, selectionOnly,
                             t0, t1,
                             numChannels, SAMPLES_PER_RUN, false,
-                            rate, format, true, mixerSpec);
+                            rate, format, mixerSpec);
 
    ArraysOf<FLAC__int32> tmpsmplbuf{ numChannels, SAMPLES_PER_RUN, true };
 

src/export/ExportMP2.cpp

@@ -308,7 +308,7 @@ ProgressResult ExportMP2::Export(AudacityProject *project,
       auto mixer = CreateMixer(tracks, selectionOnly,
          t0, t1,
          stereo ? 2 : 1, pcmBufferSize, true,
-         rate, int16Sample, true, mixerSpec);
+         rate, int16Sample, mixerSpec);
 
       InitProgress( pDialog, fName,
          selectionOnly

src/export/ExportMP3.cpp

@@ -1902,7 +1902,7 @@ ProgressResult ExportMP3::Export(AudacityProject *project,
       auto mixer = CreateMixer(tracks, selectionOnly,
          t0, t1,
          channels, inSamples, true,
-         rate, floatSample, true, mixerSpec);
+         rate, floatSample, mixerSpec);
 
       TranslatableString title;
       if (rmode == MODE_SET) {

src/export/ExportOGG.cpp

@@ -279,7 +279,7 @@ ProgressResult ExportOGG::Export(AudacityProject *project,
       auto mixer = CreateMixer(tracks, selectionOnly,
          t0, t1,
          numChannels, SAMPLES_PER_RUN, false,
-         rate, floatSample, true, mixerSpec);
+         rate, floatSample, mixerSpec);
 
       InitProgress( pDialog, fName,
          selectionOnly

src/export/ExportPCM.cpp

@@ -613,7 +613,7 @@ ProgressResult ExportPCM::Export(AudacityProject *project,
          auto mixer = CreateMixer(tracks, selectionOnly,
                                   t0, t1,
                                   info.channels, maxBlockLen, true,
-                                  rate, format, true, mixerSpec);
+                                  rate, format, mixerSpec);
 
          InitProgress( pDialog, fName,
             (selectionOnly