The stretch source doesn't really need to do anything except inc the param change count when the spectral module enabled parameters have changed. However this could get messed up if the spectral module order isn't correctly set in the stretcher instances already...Hmm.

Source/PS_Source/StretchSource.cpp

@@ -204,16 +204,12 @@ void StretchAudioSource::setSpectralModulesEnabled(const std::array<AudioParamet
 	}
 }
 #endif
+
 void StretchAudioSource::setSpectralModuleEnabled(int index, bool b)
 {
-	Logger::writeToLog(String(index));
-	ScopedLock locker(m_cs);
-	for (int i = 0; i < m_stretchers.size(); ++i)
-	{
-		m_stretchers[i]->m_spectrum_processes = m_specproc_order;
-	}
 	++m_param_change_count;
 }
+
 void StretchAudioSource::setLoopXFadeLength(double lenseconds)
 {
 	if (lenseconds == m_loopxfadelen)