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fastspeech
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# This is the hyperparameter configuration file for FastSpeech v1.
# Please make sure this is adjusted for the LJSpeech dataset. If you want to
# apply to the other dataset, you might need to carefully change some parameters.
# This configuration performs 200k iters but a best checkpoint is around 150k iters.

###########################################################
#                FEATURE EXTRACTION SETTING               #
###########################################################
hop_size: 256            # Hop size.
format: "npy"


###########################################################
#              NETWORK ARCHITECTURE SETTING               #
###########################################################
model_type: "fastspeech"

fastspeech_params:
    n_speakers: 1
    encoder_hidden_size: 384
    encoder_num_hidden_layers: 4
    encoder_num_attention_heads: 2
    encoder_attention_head_size: 192  # hidden_size // num_attention_heads
    encoder_intermediate_size: 1024
    encoder_intermediate_kernel_size: 3
    encoder_hidden_act: "mish"
    decoder_hidden_size: 384
    decoder_num_hidden_layers: 4
    decoder_num_attention_heads: 2
    decoder_attention_head_size: 192  # hidden_size // num_attention_heads
    decoder_intermediate_size: 1024
    decoder_intermediate_kernel_size: 3
    decoder_hidden_act: "mish"
    num_duration_conv_layers: 2
    duration_predictor_filters: 256
    duration_predictor_kernel_sizes: 3
    num_mels: 80
    hidden_dropout_prob: 0.2
    attention_probs_dropout_prob: 0.1
    duration_predictor_dropout_probs: 0.2
    max_position_embeddings: 2048
    initializer_range: 0.02
    output_attentions: False
    output_hidden_states: False

###########################################################
#                  DATA LOADER SETTING                    #
###########################################################
batch_size: 16              # Batch size for each GPU with assuming that gradient_accumulation_steps == 1.
remove_short_samples: true  # Whether to remove samples the length of which are less than batch_max_steps.
allow_cache: true           # Whether to allow cache in dataset. If true, it requires cpu memory.
mel_length_threshold: 32    # remove all targets has mel_length <= 32 
is_shuffle: true            # shuffle dataset after each epoch.
###########################################################
#             OPTIMIZER & SCHEDULER SETTING               #
###########################################################
optimizer_params:
    initial_learning_rate: 0.001
    end_learning_rate: 0.00005
    decay_steps: 150000          # < train_max_steps is recommend.
    warmup_proportion: 0.02
    weight_decay: 0.001

gradient_accumulation_steps: 1
var_train_expr: null  # trainable variable expr (eg. 'embeddings|encoder|decoder' )
                      # must separate by |. if var_train_expr is null then we 
                      # training all variable     
###########################################################
#                    INTERVAL SETTING                     #
###########################################################
train_max_steps: 200000               # Number of training steps.
save_interval_steps: 5000             # Interval steps to save checkpoint.
eval_interval_steps: 500              # Interval steps to evaluate the network.
log_interval_steps: 200               # Interval steps to record the training log.

###########################################################
#                     OTHER SETTING                       #
###########################################################
num_save_intermediate_results: 1  # Number of batch to be saved as intermediate results.