export CUDA_VISIBLE_DEVICES="0,1,2,3"
./zipformer/train.py \
  --world-size 4 \
  --num-epochs 50 \
  --start-epoch 1 \
  --use-fp16 1 \
  --exp-dir zipformer/exp \
  --use-cr-ctc 1 \
  --use-ctc 1 \
  --use-transducer 0 \
  --use-attention-decoder 0 \
  --enable-spec-aug 0 \
  --cr-loss-scale 0.2 \
  --time-mask-ratio 2.5 \
  --full-libri 1 \
  --max-duration 700 \
  --master-port 12345