diff --git a/LICENSE-dist.txt b/LICENSE-dist.txt
index 62b28280..7260a68e 100644
--- a/LICENSE-dist.txt
+++ b/LICENSE-dist.txt
@@ -180,17 +180,34 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 
 
-# portaudio
+# RtAudio
 
-PortAudio Portable Real-Time Audio Library
-Copyright (c) 1999-2011 Ross Bencina and Phil Burk
+RtAudio: a set of realtime audio i/o C++ classes
+Copyright (c) 2001-2017 Gary P. Scavone
 
-Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation files
+(the "Software"), to deal in the Software without restriction,
+including without limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of the Software,
+and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
 
-    The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+Any person wishing to distribute modifications to the Software is
+asked to send the modifications to the original developer so that
+they can be incorporated into the canonical version.  This is,
+however, not a binding provision of this license.
 
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
-IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
+ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 
 # RtMidi
diff --git a/Makefile b/Makefile
index 61b9bfd1..790615bb 100644
--- a/Makefile
+++ b/Makefile
@@ -69,6 +69,11 @@ ifeq ($(ARCH), win)
 	env PATH=dep/bin:/mingw64/bin gdb -ex run ./Rack
 endif
 
+perf: $(TARGET)
+ifeq ($(ARCH), lin)
+	LD_LIBRARY_PATH=dep/lib perf record --call-graph dwarf ./Rack
+endif
+
 
 clean:
 	rm -fv libRack.a
@@ -107,7 +112,6 @@ ifeq ($(ARCH), mac)
 	cp dep/lib/libsamplerate.0.dylib $(BUNDLE)/Contents/MacOS/
 	cp dep/lib/libcurl.4.dylib $(BUNDLE)/Contents/MacOS/
 	cp dep/lib/libzip.5.dylib $(BUNDLE)/Contents/MacOS/
-	cp dep/lib/libportaudio.2.dylib $(BUNDLE)/Contents/MacOS/
 	cp dep/lib/librtmidi.4.dylib $(BUNDLE)/Contents/MacOS/
 	cp dep/lib/librtaudio.6.dylib $(BUNDLE)/Contents/MacOS/
 
@@ -117,7 +121,6 @@ ifeq ($(ARCH), mac)
 	install_name_tool -change $(PWD)/dep/lib/libsamplerate.0.dylib @executable_path/libsamplerate.0.dylib $(BUNDLE)/Contents/MacOS/Rack
 	install_name_tool -change $(PWD)/dep/lib/libcurl.4.dylib @executable_path/libcurl.4.dylib $(BUNDLE)/Contents/MacOS/Rack
 	install_name_tool -change $(PWD)/dep/lib/libzip.5.dylib @executable_path/libzip.5.dylib $(BUNDLE)/Contents/MacOS/Rack
-	install_name_tool -change $(PWD)/dep/lib/libportaudio.2.dylib @executable_path/libportaudio.2.dylib $(BUNDLE)/Contents/MacOS/Rack
 	install_name_tool -change $(PWD)/dep/lib/librtmidi.4.dylib @executable_path/librtmidi.4.dylib $(BUNDLE)/Contents/MacOS/Rack
 	install_name_tool -change $(PWD)/dep/lib/librtaudio.6.dylib @executable_path/librtaudio.6.dylib $(BUNDLE)/Contents/MacOS/Rack