The newest SSL mixing board, the L500
Not that I imagine anyone here's buying mixing boards, but I think it's important to note what the newest features of the newest boards of one of the larger and more respected audio companies are so that we can see what sound will most likely sound like in the near future.
What I got from that video, is the SSL L500 is the ONLY mixing board in the world (so far...) with an All Pass Filter. I think this means that the future of sound will use all pass filters. So, what is an All Pass Filter? As the video states, "It's a bit complicated".
"Phase" is the extra sound on top of the instrument in the mixer's headphones that's created by the difference in distance between the instrument's input and output mic. The sine waves of sound leaving the instrument reach the two mics at different times. Thus overlapping each other, dangerous if the crest of the wave entering the input mic match the trough of the wave when it enters the output, creating total destructive interference.
All Pass Filters basically allow you to remove phasing details and/or reverse polarity of specific frequencies. If you like the sonic detail you get from the difference in distance between your kick drum input mic and output mic heard, you don't do anything. All pass filters allow you to reduce the phase differences and/or reverse the polarity at specific frequencies. Reversing the polarity means changing the artifact itself, as if the output mic was the input mic and the input mic was the output mic (360), or (I guess) if they're equally mixed (180). You can reverse polarity of a specific frequency 3 different ways (NoChange-180-360) to get 3 different sounding different phases and then control how much of the phase is going to be heard.
Producer "We (Label heads) want this pop track to be as clean as possible,"
Audio engineer on the board "The phase (sonic artifact) of the snare drum is coming in around 2000hz, I'll use the all-pass filter around 2000hz and lower it to 0% to clean it up".
This "extra spice", I believe, is going to be the defining sonic feature of music for the coming decade, going on top of all the compressors we already had. In other words, the leg up studios will have over bedroom producers. "The feeling" of 2015 - Next New Board.