fix duration dim

beat_interpolator.py

@@ -60,7 +60,7 @@ def beat_interpolator(wave_path, generator, latent_dim, seed, fps=30, batch_size
         times2 = np.asarray(times)
         times = merge_times(times, times2)
         
-    times = np.concatenate([np.asarray([0.]), times, np.asarray(duration)], 0)
+    times = np.concatenate([np.asarray([0.]), times, np.asarray([duration])], 0)
     times = list(np.unique(np.int64(np.floor(times * fps / 2))) * 2)
 
     latents = []