Thanks guys!
I did try many of the things you say.
I used the Dbx noise reduction (in recording and playback). I also added top end before recording, but it still had a lot of the background hiss.
And I was trying to record it as loud as possible. But since it's classical music it has a lot of dynamics. There were really loud parts and really quiet parts, where the background noises are way more noticeable.
But I recorded the stereo mix on channels 1 and 2.... with lots of dropouts
I guess another down point was a really shitty mixer.
I was going to take
my Behringer Xenyx 2442FX (the one I used for the digital recording) but they told me they had a mixer in there (I traveled about 100 Km to do that job). I asked them about the mixer and the guy couldn't get me the model, but he said it had 8 mic inputs. I though well, in the worst case it's going to be a Behringer (about the same as mine), so I didn't brought it.
When I got there it was a Peavey, and it did have 8 mic inputs.... but it was one of those live powered mixers...
The idea was to record each mike in it's own track, but I could only do 3 tracks, with the stero mix and the monitor. Ok, I lift the faders (knobs in this case) and after a while I say myself.... "hummm... when did I pan those things?!" I go back to the mixer and found no panning whatsoever...
It had a MONO main mix
So I ended up doing the "stereo" mix, using one knob for the left channel (main) and one knob for the right channel (monitor)
And for reel to reel... As much as I would love it, a reel to reel recorder just doesn't fit in a studio in Bolivia.
There is a guy here that is selling an used Nakamichi deck for 150$. That *might* be another option... I have about that money, but I'm getting a DMP3 soon, which I need more right now.
So I guess for now I will stick with digital, and try to make it a bit analogish with ribbon mikes and tube pres. Or maybe with a tape saturation plug-in (any suggestions?)