I want to introduce you to a
couple of neat tools in SATlive called
live add trace and perfect addition
trace and how you can use these tools in
your main sub alignment so I've got that
live open here and let me make sure that
I've got everything cleared out of my
x32 it all right so let's play my main
first set the delay I'll just call this
in free and let's go ahead and zoom into
the low end now let's listen to this up
cool so I'll just freeze that because
the live add trace and perfect petition
trace work in conjunction with which
ever trace is live right now the live
trace I know it's confusing the the
names and set live and the labels for
things are not the easiest to comprehend
but this is the situation this blue
trace here is the live trace the live
add trace is going to add this blue live
trace to a save quick drink this green
one in this case there is a trick to use
a quick trace as the live trace so that
you can use things that you've saved
already as quick traces and add them
together and use virtual time shift and
that kind of stuff but I'll talk about
that in a future video okay so what is
live at trace well let me just go ahead
and turn it on
three-run first we need to make sure
that I have the Select fix trace as this
one I just saved in free and then I'll
click on show live add trace now if
yours doesn't look yellow like this
because originally mine was black which
doesn't look very much with a black
background you can get a trace offset
then live addition and change it here
okay so what is this yellow trace that
we're looking at well this is a
comprehensive addition of the two
signals taking phase into account so
where we have this phase offset here you
can see that we don't have summation
right so this is doing some of the math
for us and letting us know hey when you
turn these two speakers on together at
this microphone position this is the
result you're going to get so it just
saved us a little bit of time so we
don't have to measure main VIN sub then
turn them on together and save that
trace we can just measure main and sub
turn on live addition trace and then we
can actually manipulate things and watch
the live add trace in real time the next
thing I wanted to show you is show
perfect addition trace so this is just
like live trace except it does not take
phase into account and again if your
trace doesn't look pink like mine so
it's really easy to see in a black
background just go to trace layout
perfect addition and then you can change
it so what do we have note here this
pink trace is the perfect possible
addition this would be the best possible
outcome if we had perfect phase
alignment throughout the crossover
region of our main and ourselves this is
what we would get to and then remember
our yellow one is the reality so the
pink one is now our target that's the
goal you would like to hit that's what's
possible if we can get our phase aligned
and the yellow is where we're at right
now so what this allows us to do is just
measure the sub for example and start
moving it around the room or just in
delay or put a polarity inversion and
watch and see if we can get this live
add trace from line up with this pink
trace so what I might do in the next
step then is I might continue to measure
the sub and start adding delay and see
if I can get the live add trace to get
closer to the perfect addition trace
while at the same time monitoring the
face
now in this case I can tell that
probably where I need to add delay is
actually the main so I probably want to
do this backwards so let's start over
again measure the sub first and then the
main all right so now we'll change the
fixed trace to my sub 3 and we will
start a new measurement just to me
all right so here's pretty much what we
had before except now my main is the
live trace so now I can start adding
delay to my main and see what changes
I'm going to get in the live Patricks
let's just add one millisecond of delay
all right there we go so adding a little
bit of delay we can see that my main
face has started coming down towards us
up and this yellow trace my live at
Chase is getting closer to the perfect
addition trace so let's keep adding
delay until my live add trace is as
close as possible to my perfect position
choice
cool I think we did it this yellow trace
the live add trace is now pretty much
perfectly on top of this pink tricks and
I ended up with two point seven
milliseconds of delay and you remember
in the last video using smart I ended up
with about 2.6 milliseconds of delay so
just another method to pretty much
arrive at the same result and now we can
verify this by turning them both on
together let's see if I can move this
live add trace to a quick trace though
all right so here copy add trace to
quick trace I'll put it in this last one
and then I'll turn off like that trace
and perfect addition trace so this sort
of tan guy here is our perfect addition
this is now made with 2.7 milliseconds
it's a leg now let's turn both speakers
on to go that's interesting our
summation of both of them on together is
actually higher than the live at trace
and where the perfect addition trace
said it would be for some reason it
looks like there was an offset but not
in the live add trace in these two
traces there's an offset of two DB in
the life that trace there's not and I
think that's because I didn't have this
checked use offset in calculation of
live at trace so when we started one
thing I forgot to do was look over here
and notice that there's an offset of 2
DB so that's why I have perfect position
traces now 2 DB up so I'll press the T
key until I get to the live add trace
I'll offset it by 2 DB there we go now
it makes sense so now we can see our
result this blue line of having main and
sub on together is now the same as the
live at trace so just proving that the
live at chase math was correct ok so
that's how you can use live trace
perfect petition trace in SATlive to view
how your main and self are going to sum
together and how it can help you make
adjustments along the way in the next
video I want to look at the delay
suggestion tool by which might help you
do this even faster