Getting acoustic model probabilities form ctc beam search decoder 
Hey, I've been using the beam BeamSearchDecoderWithLM module which returns a combined score of AM + bpe-ngram, and basically, I need acoustic model probabilities for each hyp to use downstream.
I *think* this would be a correct way to obtain them but just wanted to double check

-(kenlm.score(encoded_text) * alpha - score + encoded_length * beta)
which would be using the same ngram used for decoding to re-obtain seperate n-gram probs