If I were to write this paper... Drum transcription CRNN

https://ismir2017.smcnus.org/wp-content/uploads/2017/10/123_Paper.pdf

(1) I will specify the dropout size used for the BGRU layers, unless we can attribute the better performance of the CBGRU to overfitting.

(2) I will report the parameter numbers of different models. For sure, a model with more parameters will have more capacity. In such way, the better performance of CBGRU-b than the CNN-b could be attributed its larger parameter size.

(3) The CNN-b seems to perform really well. I will fix the Conv layers in CNN-b model, switch the Dense layers to GRU layers to see if GRU can really outperform.