Also from Sony, SpectraLayers Pro 3.  It works the subtraction layer model much better than R Mix.  

Hi, guys. All these suggestions are great and getting my thinking bone in gear. I'm on a tight (well... non existent ATM) budget but some of these things I have access to in one form or the other and I am always trying to figure out the most effective purchases for when a little money does trickle in.
 
Anyhoo... I had semi forgotten about the hum removal presets in Sonitus EQ (50 and 60 hz). I did some test tracking and the 60 hz set up removes a good hunk of the annoyance (mostly the lower rumble/buzz) but not all. Good start and it doesn't seem to affect the tone in any way which is great. R-Mix did however eliminate all of it without affecting the tone too much either but there is a bit of an odd "sparkling" kind of sound when the NR/Hum is cranked so perhaps giving the tracks a pass with Sonitus first then applying R-Mix a little more lightly could be a good combo solution.
 
A big part of the problem is a really need some sustain on these tracks. It is VERY high register work far up on the fretboard and I'm going line out from the heads. I can't crank and mic for sustain (apartment with thin walls and freaky neighbors). Even if I was micing both of my amps are solid state so the sustain wouldn't be great anyway and with no proper iso booth/boxes would likely be even noisier.
 
What I'm think of doing to get the sustain on the crucial notes without having to worry about hum creep on the decay is simply using time stretching/Audiosnap to drag out the few notes I need to stay strong. I hate doing that because a) it's "cheating" IMO and b) there is vibrato involved for the feel so I will have to anticipate how it is going to sound after the stretch (which means I'll need to do any left hand/tremo bar vibrato faster than normal during the performance to compensate for the stretch).
 
Just talking out "loud". Helps me think and maybe you guys can kick up a few more ideas/suggestions/anecdotes based on the current experiment.
 
Aside from that, if all goes according to plan this summer, I may have another (very) small influx of money coming in a few months. Most is already earmarked for things I needed last year but I think some of these input noise issues may need to take precedence. I've been wanting to get some decent DI boxes for both my electric guit and my bass. I was going to try for the MOTU Z-Box (and may still go that route) but I've seen nicer units dedicated to specific purposes. Alternatively (or in conjunction with DI devices/splitters) I might see if there is ANYTHING that can be done to my axes to get the noise down a bit. I need some other work done on them and I'd like to get my Ibanez out of retirement so maybe there is some onboard grounding solutions that have come out in recent years.
 
I will check out Audition... I think I have an old copy of CS around here somewhere and have been meaning to check out some of the other stuff it can do for me.
 
Geoff... how are ya, bud? Do you happen to have a link to Bit's article? And yes... I really need to stop dragging my arse on installing the free Melda stuff and checking out their paid offerrings. I'm contemplating the best approach to setting my DAW up for the best performance so I've been holding of on a lot of things until I figure out whether I want to just clean up the current build or start from scratch with a clean install. Just wanna finish this project and my personal project before I focus on that.
 
Thanks, all. Cheers.

I find the reaper plugin works about the same as the NR in Audacity. It's not on par with the NR in Audition but better than nothing. RX seems to be the gold standard.

I wanted to double back on what caught me with the OP. I just checked this and R-Mix is working fine for me in SPlat. I dug up a few old projects and also added it to a few new ones. You may be able to reinstall from X2 (and may need to then reinstall SPlat over it) to correct it. Something just seems "amiss" about it not working for you (not sure why). Bringing R-Mix back online would be the first "solution." Not sure if this is a resource issue or R-Mix itself.
 
Another option for you would be to comp the track and bounce it so you have only one wav file to play with (blow off the noise completely and leave a half second of "only hum" somewhere). I set up dropbox to help out Dub with his mastering, so you can upload that and shoot me a PM if you want me to take a quick pass on it.
 
My concern for you is that if a gate alone will not cut it that you are causing yourself more grief by trying filters with "set parameters," which do not take into account the distribution of that noise. Tools that capture a noise print and then process removal of that print work best with changing environments.
 
Out of curiosity, are others reading this thread having issues with R-Mix loading in SPlat?
 
 

Appreciate the offer, Mettulus. I should re-iterate/clarify the issue only began occurring once I tried do live monitoring (engaging the echo button on the tracks with R-Mix inserted). That's when the severe (and seemingly erroneously reported) latency started occuring. It all went downhill from there. This is likely another case of me forcing things in an odd way and my system does need some TLC at this point.
 
Although I did have a bit of a meltdown after this occurred (I have been very frustrated about other things going on in the meatworld and this failure caused a bit of a tailspin) I don't think this is an unsolvable issue. As always the input here has put me on the right track and I have a solid plan. It's just not as elegant as I would prefer but that's never stopped me.
 
The filtering I've tried with Sonitus and R-Mix have not done anything to the tone yet effectively pulled out the nastiness so that is very hopeful. You are indeed correct about subtractive EQ and sample based solutions. They always seem to suck the life out of stuff IME but that is not what I'm getting so far with these options. They are working brilliantly. I just need to get them to work without corrupting the project which I can (hopefully) do with a bit of kerfiddling exporting/importing stuff.
 
The way I see things is if I can make tasks like this happen using the not so ideal gear and more basic tools with unexpected problems flying at my head it makes me learn and become a better engineer with better problem solving skills. Then when I have nicer goodies to play with everything becomes easier.
 
Trial by fire.
 
I will update with my results and/or follow up queries. Of course I am always hungry for ideas and I think this has been a really cool thread so if anyone else has some thoughts I'll be watching.
 
Thanks.

Thanks for the clarification. The tracking part makes a lot more sense. I have been snared by the pitfall of wanting the tracking to sound like the final mix as well, but it can have associated frustrations. As long as you are capturing 24 bit there is a lot of tolerance in the mixing itself.
 
Another tracking alternative would be to direct monitor to a physical amp. That may not give "final mix" results, but would at least remove the overhead of FX while tracking for you. Can save attacking the noise issue for when latency is not a concern.
 
Something else to play with regarding the noise is orientation of the guitar to sources (if not already tried). I rarely use single coils because they are finicky this way, but being perpendicular to the closest sources makes them tolerable at times.

You got it, mett. Really what the plan now is anticipating how these tools/effects will work after the fact and tracking with the noise. As an inexperienced engineer this of course is kind of a mindfrack but if I was successfully able to get rid of the noise before then I just have to have faith it will work again and track normally. I may do another test track with my new input settings (I got my input gain up to increase sustain as much as possible) and try again to make sure it will work on the new signal but I've already had some good prelim results. Really at this point in the mix the noise will be unnoticeable but this isn't for my own work so I want to make sure it is super clean and slick and of course it helps me grow as recording engineer (which I need even more experience at than mix engineering especially considering my meager gear and set up).
 
As far as find the "sweet" (least noisy) spot in my room it is quite literally one exact position that only allows for a few inches of neck swing either way and that still introduces some hum but not nearly as much as elsewhere. I may be able to get better results rolling my arse completely outside of the room but cabling is an issue as is remote transport control. I may try messing with that later on but I think for this particular project I'm on the right track for what is needed. It has been an interesting challenge considering the tones required for the material.
 
Cheers.

http://soundbytesmag.net/meldamdynamiceqpart1/
 
http://soundbytesmag.net/spectraldynamicsdynamiceq/
 
Bapu agrees with bit that spectraldynamics is really helpful.
 
I add my voice to that chorus. I've used it quite a lot since buying it for a number of things.

Beepster
 
 
Yeah, I think it may be one of those lookahead tools. However the latency persisted even after I disabled it and the crash/corruption certainly isn't normal. It's not a huge project but has quite a few clips and multiple instances of TH2.
 
 

Plugins that induce latency (either CPU intensive or look ahead) will still induce latency when disabled.  Sonar has to still process audio through them, as it doesn't know if you might enable them again during playback.

Beepster

benjaminfrog
As an alternative, Reaper's freeware plugin bundle, ReaPlugs, includes ReaFIR, which can be used to capture noise profiles and subtract the noise from your audio. 
 
http://www.reaper.fm/reaplugs/

 
Hi, Ben. Does it work better than Audacity's noise removal?

Hi, Beep. Unfortunately, I don't know. I use RX and just mentioned ReaFIR, because I knew it had that feature and that you were hoping to keep costs down. Sounds like (from a subsequent post) you're gonna give Audition a go. Hope you get some tasty results.