Adding the possibility to train with durations

configs/data/ljspeech.yaml

@@ -19,3 +19,4 @@ data_statistics:  # Computed for ljspeech dataset
   mel_mean: -5.536622
   mel_std: 2.116101
 seed: ${seed}
+load_durations: false

configs/model/matcha.yaml

@@ -13,3 +13,4 @@ n_feats: 80
 data_statistics: ${data.data_statistics}
 out_size: null # Must be divisible by 4
 prior_loss: true
+use_precomputed_durations: ${data.load_durations}