Fixed file source and cleaned up buffering code

core/src/signal_path/dsp.cpp

@@ -116,4 +116,8 @@ void SignalPath::startFFT() {
 void SignalPath::stopFFT() {
     reshape.stop();
     fftHandlerSink.stop();
+}
+
+void SignalPath::setBuffering(bool enabled) {
+    inputBuffer.bypass = !enabled;
 }