This is probably an insanely stupid question and I am sorry in advance... I just purchased the Sennheiser HD 600's I am aware they need an amp for the best possible use. However, I do have the Scarlett 18i6. Will this audio interface work in the same way as an amp would?

Hey guys! Really need some help here with this track. It is supposed to be in D#Minor I checked the vocals with Newtone and they are in D#Minor however the instrumental is not. This is very frustrating because in the piano roll I have the intro melody (pads) going from D# to G# back down to D#. However, when I bounce this to audio and let Newtone analyze it this is not the case. It goes from G to C to G (basically it does not go from D# to G# to D# like I have it imputed in the piano roll). How do I fix this? Is it a problem with the actual sound itself? I only have the incorrect reading with pads... if it is a sharper sounding sound (like the synth in the drop or even a piano) than Newtone analyzes it exactly how I have it imputed in the piano roll. In other words it is an accurate reading. Hopefully this makes sense if not I will try to explain it more. Here is the track for reference.

https://soundcloud.com/hanson5325/were-all-about-having-fun

So yeah as the subject line say here's is a jazzy ish edm piece I have been working on. Appreciate any kind of feedback!

https://soundcloud.com/hanson5325/light-up-the-night/s-ZSbow

What does it mean if a loop is labelled F? Is it F Major or F Minor?

Basically I'm curious if you guys have any tips on how to send a demo to a record label.

Edit: I only ask this because I came across this today and wanted to know if others shared the same opinion. http://blog.liveschool.net/how-to-send-a-demo-to-a-record-label/

https://soundcloud.com/hanson5325/were-all-about-having-fun
Wrote this a couple months ago. It's my take on the blending of the two genre's Alternative rock and Electronic music.