I'm Nathan lively and today i want to
show you three easy powerful ways to
phase align your main and your sub
first of all let me show you what we
have going on here so right now we're
looking at a trace of the main let me
show you the full thing so not
disorienting
so here's a measurement of our main
speaker and now i'm going to zoom into
the low end this is just the lowes from
0 to 200 Hertz and i'll go ahead and put
a sub measurement in there and you can
see that I've already level match these
so that would be the first step but once
i have them level match then I can start
talking about whether or not they're in
faith so without doing anything let's
see what we have already know we can do
this in a SAT live here by opening up
the live at tres basically what this is
doing is its summing these two traces
and taking the phase down here into
consideration so if we were to turn
these two speakers on together at the
measurement microphone position
this is the result we would get ok so
now we're wondering how good is that
what I'm going to compare that to then
is the perfect addition trace
so now this pink trace that you see here
is what we would get if you didn't take
save into account so this is the perfect
addition of our main & R sub if we were
perfectly phase align so we can see here
that this purple trace is where we are
now this pink raise is where we want to
be so you know we have a little ways to
go here this
these lines are 60 per division so we
have 2 or 3 DB here until we're at
perfect addition so the first way that
most people learn how to do this kind of
phase alignment is that they pick a
frequency and then they just try to make
the two pictures match so let's do that
one first
this is going to be an overlap crossover
I end up doing those a lot of times it's
it's a sound better to me and I and a
lot of the
shows and events that i work on i think
it fits us more so that could be a whole
other conversation but for now just be
aware that we're using an overlap
crossover so then the question is what's
our region of interest where are we over
lapping where the signals really and
interacting with each other and the way
I set those is by seeing where we have
six are finding our 6 DB down point with
each of these traces so we're going to
start with our main in its blue trace
here so just focus on the blue trace and
as I move the cursor down you can see
that we hit the line we go past 6 eb and
then we hit it again here so this to me
is a little bit premature
so i'm going to call this spot 60
degrees as a 60 down point I'm kind of
looking at this line trending down right
and so I put a marker there at 60 Hertz
now the next thing i want to do is find
a 60 B down-pointing my sub in the
high-end so let's switch over to the sub
and now as i move the cursor up you can
watch I hit the 60 down point but again
I think that's a little premature I'm
kind of looking at what the trend is and
i think this is a better spot for that
so i put another marker and hundred
twenty Hertz and now we know that the
region of interest here is from 60 Hertz
220 hurts and so I put those markers in
so that now when I look down here at the
phase trace it's easier to look at so
right through here right and pretty
quickly I see that we are not faze align
right so that's why our live at trade
here and the purple is not all the way
up to the pink and I think okay I can
tell here that the yellow line is
farther down than the blue line so i
just need to add delay to the blue line
to make these match
luckily I have a virtual time shift here
so i can start adding delay to the blue
line to try and match make it match with
the yellow line
and as I do that you can watch the
purple line start to get more edition
and get closer to our perfect that
perfect addition trace the pink eye
I'm a little bit more closer closer
closer
that looks good good and now as I add
even more you can see that I get out of
phase here in the top on pointing at the
screen and obviously you can't see me
pointing at the screen up here
look I'm not getting perfect addition
anymore if I go back a little bit but it
looks pretty good but if I go forward a
little bit group adding more delay i'm
not getting perfect addition there but I
am getting better edition down here and
so right on here is kind of the midpoint
right here's the midpoint of our region
from 60 Hertz 220 hurts at 85 hurts and
now we match at midpoint and we have
pretty good addition here and so I'm
thinking though these don't exactly
match but I've pretty good addition so i
might go ahead and run with it right
this is what I did for a long time as I
just make the pictures match as much as
I could and then I'll move on so let's
go ahead and save this live at tres to
see if we can do better with another
method
okay great already have that saved and
let's reset this guy
ok so you might want to do this a little
bit quicker and the reason is that this
goes really fast when i'm just doing it
without any real audio right but when
you're doing this in real time and you
have to wait for these lines to redraw
it's not instantaneous especially in the
low end you might have to wait a few
seconds for these lines to redraw
themselves every time you change the
light so you change the delay then you
sit there for a little bit then every
drawers and then change the delay
and every draw so i could take a little
while you said annoying so there's a
little math here that could make this a
little quicker if you're not afraid of a
little math then this is the piece that
you need and this information is on the
back of my business card
I ending triangles business cards and
i'll put a link to where you can
download at the bottom of this video so
let's go through this real quick so let
me just tell you what these pieces are
you never seen this before so this is
Delta phase and that means difference in
phase a 360 degrees and difference in
frequency so how we're going to put
those numbers in there
well let's pick this spot 85 hurts and
right now we are measuring will go back
to the other one so we need to measure
the high phase first so we're measuring
the main the blue working at the blue
trace and i can see that 80 degrees here
but that's really tiny if you can also
look up here 88 degrees
ok so that would be our high phase and
then we switch over to measuring the sub
and I can hear those three degrees you
can see up here says three degrees so
what I say 88 and three
ok so then we would subtract three from
88 to get our Delta phase and there's no
difference in frequency because right
now we're just measuring one frequency
which is 85 hearts so then we can
calculate the entire thing and i'll show
you how to do that real quick okay so
that would be 85 / 360 / 85 and that's
going to give us the answer in seconds
so then we're going to multiply by a
thousand to get two point seven
milliseconds and I guess if we rounded
up that would actually be 2.8
milliseconds great so then we didn't
have to do a lot of clicking and waiting
we can just go ahead and put 2.8
into our delay line here and then we can
just check and then if it's still not
right and we can do that calculation
again or you know we can push it a
little bit one way or the other to make
the pictures match so those are the
first two ways that i learned how to do
it one for a long time I just made the
pictures match and then too I learned
this piece of math that helped me do a
little bit faster and there's a third
way on the show you which is native to
chat live so I'm not sure if you can do
it in other programs and but if you have
that live this will help
so we're going to use the feature called
suggest delay the first thing we need to
do is identify the region here so that
that live knows what i'm looking for so
I'm going to select this entire region
and i have only have two traces showing
don't worry these other live at traces
are not going to be factored in and then
i click on suggest delay look at that it
says- 2.9 so basically negative 3
milliseconds of delay and the polarity
inversion number one how do you do
negative delay number two in version
that's gravy
ok well now i look down here i don't
know if you can see this tiny box but I
see that it's telling that lives trying
to tell me that it's think that the main
has a polarity inversion luckily my
virtual timeshift can add negative delay
so let's try that so negative 3
milliseconds and a polarity change out
the 30 looking kind of better right
it's a little bit closer messed up here
than we had before and now our live at
tres look it looks like it's almost
perfectly on top of the perfect addition
trace
and we can turn on our fav trace from
before when i did it manually just by
making the pictures much and we can see
that again it's a little bit better so
now this is the method i usually use in
the field because it takes if you use
the first message with where you're
trying to make the pictures match it
takes a little bit longer
plus you have to try some different
things so in this case if I wanted to
find out if there's a polarity inversion
what I would need to do is I would
switch from delaying the sub delaying
the main and then I would have to hit
the polarity cut because you can't do
negative delay in real life right so
then I would have to hit the switch
those over clarity invert and i would
have to save some traces that I could
compare those later and then the second
method doesn't really help me that much
it just helps me do it faster this third
method when using the suggest delay
feature here let me know that there's
actually a polarity inversion involved
in that i can get the faces to match
even better if I clarity invert before I
add that delay so just to sum up again
the blue trace is our main this yellow
traces are sub and now this green one is
me doing it manually basically this is
the addition for me doing the phase
alignment manually making the pictures
match and now this pink i'm sorry the
purple one which is on top of the pink
is what we got from using suggest the
leg so those are three ways I know how
to do phase alignment for means
themselves and basically all use
whatever you have available at the time
whatever whatever i think it's going to
be fastest and most accurate if you have
any questions about anything that I
talked about today please feel free to
comment below this video and we'll get
into it