your seasoning analogy is good. i get it. but, wouldn't mixing down to a tape machine be better than say, using a vst plugin to emulate a tape machine? so to extend the analogy, yes it's like adding seasoning once the meal is cooked, but a vst is like adding seasoning via virtual reality on google glass or something.
I won't argue there...about the VST being a "virtual" seasoning....but 1.) it's going to depend on the tape deck used VS 2. the quality of the VST.
What I mean is...there are a lot of old tape decks that IMO don't do much more than muck up the audio because they are not properly calibrated, they are old and worn or they are just consumer grade stuff...none of which will give you analog tape magic....though I'm sure some here will disagree.
If I was going to *mixdown* to tape...well, I actually do...

...but I go from DAW to console with individual tracks, and then I'm mixing down to 2-track tape...but especially if I was just going to run a nice, finished, polished mix from my DAW to 2-track tape...I would want a pretty decent tape deck, as that is the final bit of processing on your mix...and you don't want the tape deck to degrate it, you want it to enhance it.
On the other hand...tracking to tape at the outset, you can get away with a greater variety of tape deck quality...because you're doing one track at a time, and you have more control over each track as it goes down...unlike the final mix.
IOW...at the mixdown stage whatever yo do, you wan to keep it subtle, and you have to be more careful because it's the stereo mix...so what makes the drums sound better my simultaneously kill the guitars...etc...etc.
So back to the VST thing...IMO...today there are some realty, really good plugs that will let you get that tape flavor, without rolling the dice on a deck...and many of the better ones were modeled after the kinds of tape decks that most of us only dream of owning.
That said...you should still get a deck and give it a whirl. Get the best you can...and see what comes out. If you don't get hard, sell it.
I'm not sure of your budget...but you can find decent 2-track and 4-track decks for a few hundred...forget that $ 3k CLASP system.
If you just use it to-from the DAW...you don't even need a mixer or any other analog stuff. Your interface can provide the connections to it.
If you want to track to tape...you go into the interface and take the Line outputs into the tape deck.
For mixdowns from the DAW, you just go Line outs the tape deck.
To go from the tape deck to DAW...you plug the tape deck's Line Outs to the interface Line ins...and to the DAW.
So you don't need a lot of other analog gear if you just want to mess with tape.
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Okay cool, so it sounds like there's no real benefit to mixing down to a four track tape machine that uses traditional 1/4 of the tape per track. Unless maybe someone want to add some hiss for a lo-fi sound, but short of that there's no artistic benefit to it, correct?
I would kinda feel that way...others may not.
I mean...if you just want some "tape sound"...try it out...,try any tape deck...try a cassette deck...whatever.
If you want a *2-track mixdown deck*...I would get a 1/4" 1/2-track that has some credibility in that area. A decent "broadcast" grade TASCAM or Otari will get you there...you don't need the real high-end stuff.