Update ljspeechimportable.py

ljspeechimportable.py

@@ -684,7 +684,7 @@ from Modules.diffusion.sampler import DiffusionSampler, ADPM2Sampler, KarrasSche
 sampler = DiffusionSampler(
     model.diffusion.diffusion,
     sampler=ADPM2Sampler(),
-    sigma_schedule=KarrasSchedule(sigma_min=0.0001, sigma_max=1.0, rho=9.0), # empirical parameters
+    sigma_schedule=KarrasSchedule(sigma_min=0.0001, sigma_max=0.57, rho=4.6), # empirical parameters
     clamp=False
 )