I have tracked a recording of Bartok's 44 violin duets with a couple of vintage ribbon mics through a Manley tube preamp, while recording the reverb in the hall with a couple of sdc's, and I'm now mixing the album. the result is absolutely gorgeous but needless to say with that setup, I do have quite a bit of noise that I need to do something about. So my questions are these: 1) When in the process do I apply the noise reduction? I'll be using the Izotope RX plugin. Before or after I start balancing EQ and levels? It was recorded on 3 different sessions, so there are unfortunately small differences that needs ironing out. 2) Do I take a noise print of all 4 tracks at once, or do I do the main ribbon mics at once, then the reverb tracks? Disclaimer: As I'm a professional musician and just an amateur sound engineer, I will probably get a lot of flack for posting in the wrong forum, but I'm hoping a pro will have mercy on me, and spill a bit of wisdom. It is for a commercial release, so my friends (the performers) have placed a lot of trust in my self taught abilities.