{
    "alpha": 20.980067750984084,
    "eta": 0.8279734393359678,
    "eval_metric": "merror",
    "gamma": 30.821412472294515,
    "lambda": 3.649061104955205,
    "max_depth": 20,
    "num_class": 61,
    "num_round": 10,
    "preprocessor": "mel"
}