Update README.md

corrected typo, clarified input format

README.md

@@ -24,7 +24,7 @@ This dataset, counting 2.4 million ECGs from millions of patients in 4 countries
 
 ## Usage
 
-**Input signals must be 5-second 12-lead ECGs sampled at 100 HZ**
+**Input signals must be 5-second 12-lead ECGs sampled at 100 HZ. The leads are concatenated to each other**
 
 ```python
 import torch
@@ -46,7 +46,7 @@ path = "path/to/your/finetuned-hubert-ecg-model.pt"
 checkpoint = torch.load(path, map_location='cpu')
 config = checkpoint['model_config']
 hubert_ecg = HuBERTECG(config)
-hubert_ecg = HuBERTForECGClassification(hubert)
+hubert_ecg = HuBERTForECGClassification(hubert_ecg)
 hubert_ecg.load_state_dict(checkpoint['model_state_dict']) # fine-tuned model ready to be used or further fine-tuned
 ```