tran: reduce memory usage

train.py

@@ -33,7 +33,7 @@
 train_project="supervoice-enhance"
 train_datasets = ["./external_datasets/libritts-r/dev-clean"]
 train_eval_datasets = ["./external_datasets/libritts-r/test-clean/"]
-train_duration = 15
+train_duration = 10
 train_source_experiment = None
 train_auto_resume = True
 train_batch_size = 5 # Per GPU