4:33 In Rachmaninoff's own manuscript, a copy of which I own, he very clearly writes a G-flat in the right hand, and very clearly writes G-natural at the same time in the left hand. the original key being E-flat minor. There is in my opinion no reason to change that note here. You can find a recording of Rachmaninoff playing the piece himself here on TH-cam and hear it for yourself. It's his own music, so I'm pretty sure he knew what he was doing. Here is a link. th-cam.com/video/sTUxrPJfpqk/w-d-xo.html
4:33 In Rachmaninoff's own manuscript, a copy of which I own, he very clearly writes a G-flat in the right hand, and very clearly writes G-natural at the same time in the left hand. the original key being E-flat minor. There is in my opinion no reason to change that note here. You can find a recording of Rachmaninoff playing the piece himself here on TH-cam and hear it for yourself. It's his own music, so I'm pretty sure he knew what he was doing. Here is a link.
th-cam.com/video/sTUxrPJfpqk/w-d-xo.html