Robertt8 said:
just out of curiosity, how does sound, that you can't hear (appears to be silence), take up space? and where does it take up space? If I get rid of it, I should be able to make the track louder?
It won't make the track louder on a db meter (0db = 100%), but you
can make the mix a HELLUVA louder in APPARENT volume, which is all we really care about. There's an audio clip example below. If a mix has a lot of subsonics in it, it'll seem like you can't turn it up very loud before your speakers start crapping out, because, well...the speakers in most boom boxes and attached to computers will just start FARTING. If a mix has a lot of subsonics, then there is less room for the midrange, which is what we all hear.
What Are They? - If you've ever stood in front of a PA at a concert, and literally seen your pants move from the air coming out of the sub cabinets whenever the drummer hits the kick, or if you've ever FELT a car with a kickerbox go by (when your windows rattle), that *thump* *thump* is what I'm talking about. Humans are (some say) capable of hearing as low as 20Hz...(I can't). But they definitely color the sound of just about any instrument. An
acoustic guitar resonates at subsonic frequencies...you usually can't feel them unless you amplify the crap out of the acoustic. Subsonics are in all good mixes. It's just a matter of getting the right balance between what you HEAR and what you FEEL. I'll go out on a limb here and say that there's absolutely nothing wrong with cutting all the lows on an
acoustic guitar below 80Hz ever. Beyond that, it just depends on the mix.
Okay, a freaking example already
2 clips of the exact same portion of "So Cold" - Both are the same volume, but one is just your mix from 50Hz down (I left some sonics in there), and the other is your mix with everything below 40Hz rolled off.
**WARNING**BE CAREFUL IF YOU LISTEN TO THIS, THAT FIRST CLIP WILL DEFINITELY BLOW SPEAKERS.
http://www.nowhereradio.com/artists/album.php?aid=1698&alid=601
Again, they're both the same volume, but one has a lot more APPARENT volume. If you listen on really good speakers or subs, or good headphones, you'll feel the bone rattling bass that I think you probably don't want or need in your mixes in that first cut.
Dumb commentary portion - A lot of people believe that as long as you track well, your mix will be good. Well fuck, maybe that works if you're doing all synthesizer/keyboard stuff, but if you're actually mic'ing guitars and vocals and drums, and you're not using low cut filters on them during tracking, then you'd BETTER roll some of that shit off, (subtractive EQ) b/c unlike analog, digital recording is pretty unforgiving, and if you record subsonics on a track, they'll freaking be there, lol...and when you have 2 or 3 guitars, and 2 or 3 vocals with no filters on them, EVEN WITH NO BASS GUITAR, you can build up in the subsonics pretty quickly.
**Disclaimer** I don't know what the fuck I'm talking about 98% of the time, so take this with a grain of whatever.