turing off chord_cond for demo

sample.py

@@ -600,9 +600,12 @@ def main():
                 #print("init_data.shape, init_data.min, init_data.max = ", init_data.shape, init_data.min(), init_data.max())
             else:
                 init_data, mask, chord_cond = None, None, None
+            # chord_cond doesn't work anyway so f it: 
+            chord_cond = None
 
             print("chord_cond = ", chord_cond)
-            extra_args['chord_cond'] = chord_cond
+            if chord_cond is not None: 
+                extra_args['chord_cond'] = chord_cond
             # these two work:
             #x_0 = K.sampling.sample_lms(model, x, sigmas, disable=not accelerator.is_local_main_process, extra_args=extra_args)
             #x_0 = K.sampling.sample_dpmpp_2m_sde(model, x, sigmas, disable=not accelerator.is_local_main_process, extra_args=extra_args)