What TS mean by the term warmth is the quality of sound whether it's vocal or instrumental as experienced in a
pure analogue recording or playback.Sound is integral part of film making but unfortunately most young filmmakers
have been listening to digital playback since the day they were born.The only things analogue is the voice,instruments and microphone.The rest is all digital in process.So the only experience of analogue is the everyday sounds that they hear and live music.Just compare a live sound versus playback and you immediately
get to know the difference.Can digital approximate analogue quality? Yes if you understand analogue and
digital recording technology but I think this is barely touched on in a film making course or curriculum.
Imagine a blob of sound coming from the middle of the screen ,it's like a headless voice without the feel of the body,in other words disconnected.Compare it with a good digital reproduction of analogue you will know the voice
comes from a human body and instruments have their placing in the sound stage with the ambience of the place.
In other words a 3D experience.It is not likely you can get everything from a camcorder.Just research music recording forums,the questions asked often are what microphone/placemeent,amplifier/mixer hardware and software best suited to get a good approximation of analogue sound that is natural to the real world.
Tape hiss is an artifact of analogue and playback process,pops and crackles you get when vinyl record has dirt in the grooves both of which are minimised to the extent that it does not detract from a good analogue playback.Digital sound is clean so where do you think the problem is? Adding hiss and pop/crackles do not make
a recording sound analogue