I'm working on an audio classification experiment. In my original database, I have 1,412 records. To improve the performance of my models, I resorted to data augmentation, applying simple techniques such as noise addition and pitch reduction.
After this step, my dataset was 7060, including the original 1412 records. My big question is: how to proceed with the classification experiments now, considering that the results are better, however, I don't know if because of having original data and copies there is an "inflation" in the results.
Does anyone know what the best strategy might be for this situation? Is there any way to prevent copies and originals from being in different sets (training and testing)?
Sorry for the naive question.