app.py

import gradio as gr

from nemo.collections.asr.models import ASRModel
import torch
if torch.cuda.is_available():
    device = torch.device(f'cuda:0')
asr_model = ASRModel.from_pretrained(model_name='stt_en_citrinet_1024')

from happytransformer import HappyTextToText, TTSettings
happy_tt = HappyTextToText("T5", "vennify/t5-base-grammar-correction")
args = TTSettings(num_beams=5, min_length=1)


def transcribe(audio):
  """Speech to text using Nvidia Nemo"""
  text = asr_model.transcribe(paths2audio_files=[audio])[0]
  # Add the prefix "grammar: " before each input 
  correct = happy_tt.generate_text("grammar: " + text, args=args)
  return text, correct.text
    
gr.Interface(fn=transcribe).launch()