diff --git a/Makefile b/Makefile
index 121c05c..c196d9b 100644
--- a/Makefile
+++ b/Makefile
@@ -79,6 +79,19 @@ extract:
 	@if [ -x $(PY) ]; then $(PY) extract.py; else python3 extract.py; fi
 
 ast:
+	@AUDIO_A=$$(python3 -c "import tomllib; c=tomllib.load(open('config.toml','rb')); print(c['extract'].get('file_a',''))" 2>/dev/null); \
+	AUDIO_B=$$(python3 -c "import tomllib; c=tomllib.load(open('config.toml','rb')); print(c['extract'].get('file_b',''))" 2>/dev/null); \
+	OUT=$$(python3 -c "import tomllib; c=tomllib.load(open('config.toml','rb')); print(c['extract'].get('out_dir','extracted'))" 2>/dev/null); \
+	STEM_A=$$(basename "$$AUDIO_A" | sed 's/\.[^.]*$$//'); \
+	STEM_B=$$(basename "$$AUDIO_B" | sed 's/\.[^.]*$$//'); \
+	NEED_EXTRACT=0; \
+	if [ ! -f "$$OUT/$${STEM_A}_audio.wav" ] || [ ! -f "$$OUT/$${STEM_B}_audio.wav" ]; then NEED_EXTRACT=1; fi; \
+	if [ $$NEED_EXTRACT -eq 1 ]; then \
+		echo "=> extracted wavs not found, running make extract first..."; \
+		$(MAKE) extract; \
+	else \
+		echo "=> extracted wavs exist ($$OUT/$${STEM_A}_audio.wav, $$OUT/$${STEM_B}_audio.wav), skipping extract"; \
+	fi
 	@if [ -x $(PY) ]; then $(PY) sync_audio_test.py --config $(CONFIG); else python3 sync_audio_test.py --config $(CONFIG); fi
 
 clean: