No, the closer to full scale, the better the signal to noise of the signal. We're not setting absolute levels with REW, we're using it to measure response and set up equalizers. 75dBSPL is quite appropriate for that.wouldn't a -30.0dBFS level sweep with a 75dB target be more appropriate?
It doesn't, it's up to you to set your levels. REW measures response. Set any levels you like after you've found the proper spot for your subs and mains and room treatments.If this is so, how can REW account for this (or does it already)?