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Heyas,
You've touched on a couple of topics here. I'll just pick two for now.
I'm pretty sure I'm going to go deeper than you want, but I hope that the information I present is useful.
1. Bassline muddiness. there are a couple of solutions to this. One which has been touched on already is making sure that both sounds do no occupy the same frequency range. This can be fixed with EQ, or another idea is to use two basslines. One sub bass under the kick, and a higher frequency part above he kick. Same idea, but will usually sound "Fuller".
Another trick I use often, bu I don't know if it's possible in Reason is to have a sidechained compressor on the bass line. You set up the compressor with a side chain input from the kick. This means that every time the kick hits he Bline gets ducked in volume behind the kick. If you get the settings right and with the right sounds you don't actually realise it's happening due to frequency masking. The net result is the two never collide in the same part of the spectrum at the same time which produces clarity. If you can set this up then try it, if not then simply use EQ for now. I usually use both EQ and compresson and careful sound selection to get this to work. this little problem is one of he blacker arts of getting mixes to sound great..
2. Dither. Oh my, this is a giant can of worms. The VERY short synopsis of this is:- When ever you are reducing bit depth you should dither. ie if you go from 24 bits to 16 bits 9ie cutting a cd) then you should apply dither to 16 bits. Dithering a 24 bit signal to 16 bits but not reducing the bit depth will simply force you to have a 16 bit signal contained in a 24 bit file. Dithering once applied cannot be taken of so be careful.
Now what does it do? Well, basically through some clever maths and some knowledge abou how the human ear works it actually introduces carefully calculated DISTORTION into your signal. this produces the perceived effect of increasing the dynamic range to greater than is actually possible wih the number of bits that you have. U22 dither get's its name from the fact that Apogee claim that it gives the equivalent of 22bits of dynamic range from a 16 bit input.
Unless you have great ears and an awesome listening environment you probbably won't hear much of a difference.
So why dither? If you don't dither when you drop bit depth you simply chop off the low order bits. ie from 24 bit to 16 bit you simply ignore the lowest 8 bits. this can produce unpleasent audiable artifacts due to truncation.
if I haven't los you by this point I suggest you read this EXCELLENT paper by Nikka Aldredge. He really knows his stuff..
http://www.cadenzarecording.com/dither.html
Cheers,
Rob
PS. Good gear helps, but Great Talent & poor gear is better than Poor talent and great gear.
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