Requesting a revision from your engineer.
You can request a revision from your engineer via the project page. Here you can leave overall comments or time-stamped comments that precisely depict what you want edited and at which point in the song. To do this just click and drag across the region of the waveform that you want edited and type your comment.
Once all of your comments have been typed out on the project page click the 'Request Revision' button at the bottom to send these notes back to your engineer for them to adjust and re upload an updated version. 