I try to be as objective as possible while mixing. I play or program all of the instruments so I don't really have more 'me' factor over one instrument or the other.
Try and keep the different instruments from stepping all over another and know what your basic groove tracks are, besides the...
Mixing is creating a coherent whole from the sum of the parts to a stereo master.
Mastering is adjusting and improving upon the final stereo mix for a finished product. Akin to icing on the cake.
Is it really an echo or is it a sympathetic vibration of an object in the room?
Is there an acoustic guitar in the room or other object that would vibrate at the frequency you are having trouble with?
Mixer inputs are not called 'tracks'. Those are on your tape machine. Channels are what a mixer has. You should have at least as many channels as you have tracks. More is better.
Depending upon your routing options, any channel can be routed to any track on the machine.
Direct outs are...
I don't think the Behringer mixer is going to cut it for a 16 track machine. You might want to re-think your mixer choice.
You will have no direct outs, and not even an insert to pull the signal from the board to the machine. Not to mention getting it back into the mixer even if you had the...
Dynamics aren't generally run through a send. They are normally inserted, but anything is possible.
It might be because you are mixing a wet and dry signal through the send. ???
You are. But that's not a slight, just a fact.
I've been mixing on a pair of Optimus Pro LX7's longer than you've been on this planet and they sound fine. So will your Tannoy's.
Get a Fluke and it will be the last meter you'll ever need.
Something in the 1xx series say the 113 or 115 should be all you'll need unless you're designing and engineering projects.
I have an 8000A on the bench and an 187 for a handheld. Best meters money can buy.