1 files changed, 4 insertions, 0 deletions
diff --git a/src/audio/synth.h b/src/audio/synth.h
index 3a42a61..61ecfd0 100644
--- a/src/audio/synth.h
+++ b/src/audio/synth.h
@@ -21,10 +21,14 @@
 #define MAX_SPECTROGRAMS                                                       \
   32 // Current track: 14 unique, 32 provides comfortable headroom
 
+#define SPEC_VERSION_V1      1
+#define SPEC_VERSION_V2_OLA  2
+
 struct Spectrogram {
   const float* spectral_data_a; // Front buffer
   const float* spectral_data_b; // Back buffer (for double-buffering)
   int num_frames;
+  int version; // SPEC_VERSION_V1 or SPEC_VERSION_V2_OLA
 };
 
 void synth_init();