Thanks!
chazba: Yeah, I agree. It surely isn't as seeing perform live the BSO, but it's probably the best we get to see here in Bolivia, and it's a good step in the right direction.
The average age of the orchestra is 16 years old. It's a project to keep boys in the suburvs away from the bad life (drugs, crime... etc) and well... get them to do something productive. So I think it's a great project! Also that orchestra is going to record with my band (we play sympho black metal)
Back to the recordings: I ended up recording it on my portastudio, and a digital 2 track back-up. The cassette surely lacked some top end frequencies, which I boosted with EQ. I guess I didn't add enough to the Piano, which was recorded with a ribbon, instead of the SDC as the main pair, probably that helped too. I'm going to try that in a while.
While I was mixing, at times when the orchestra hit full volume and the piano was also playing, the piano was barely noticeable, so i added a couple dBs at 2k to the piano and removed them to the orchestra, and it became much clearer. You think that was a bad decition?
Also the phase, the distance between the mikes wasn't that much but I'll double check anyway.
However I'm not too sure about the editing, since the mikes were close, there is piano all over the mikes (especially the main pair), and well, it's not that serious of a recording. I think they would rather have an accurate representation of what they performed so they can hear their mistakes and try to fix them.
All mistakes apart, I love the analog feeling

courtesy of tascam 414mkII
Pd: Is there a way to get rid of tape hiss that is not Waves X-Noise?