Update README.md

README.md

@@ -25,6 +25,14 @@ The finetuning process took over 60 hours on dual Tesla A100 80Gb.
 
 ## Usage
 
+In order to process phone calls it is highly recommended that you preprocess your records and adjust volume before performing ASR. For example, like this:
+
+```bash
+sox record.wav -r 16k record-normalized.wav norm -0.5 compand 0.3,1 -90,-90,-70,-70,-60,-20,0,0 -5 0 0.2
+```
+
+Then your ASR code should look somewhat like this:
+
 ```python
 import torch
 from transformers import WhisperForConditionalGeneration, WhisperProcessor, pipeline
@@ -62,7 +70,7 @@ asr_pipeline = pipeline(
 # read your wav file into variable wav. For example:
 from io import BufferIO
 wav = BytesIO()
-with open('call.wav', 'rb') as f:
+with open('record-normalized.wav', 'rb') as f:
     wav.write(f.read())
 wav.seek(0)