How to create a karaoke track from an mp3?

I think in the mixer window you have to slect the m/s button under the meter.
after that the track is now stereo and you should be able to use the arrange window to view each of the tracks separatly.

if that doesn't work there may be an issue with the file you are importing.

I'll double check it with one of my own mp3's

update:
follow this and try again,
Audio>audio harware and drivers>Audio tab>General tab>record and convert interleaved into split stereo files [check box]

if this doesn't work i'm not sure what to tell you.
I think Apple may have disabled this feature to be done manually from the arrange window, now it looks to be a pref setting that'll be done audomatically.
But only if you tell it to do it.

if I'm understanding you, what you wish to do is flip the phase of one half of the stereo file?

if so all you have to do is use the "gain" plug-in located in helper in the dropdown menu.

there is a setting for you to select either side of a stereo file to invert the phase, but just to give you a heads up, this can also exagerate the vocal vevel and make the music disappear.
you can also play with "direction mixer" located in the same drop menu, to do similar kinds of things.

only alternative is re-record them as separate mono tracks and manipulate them like that.

I hope this gets you moving on what you need to do... it is alot more difficult than just flipping the phase though.

I'd goto waves.com and download thier "gold" demo, there is a plug-in that lets you slpit a stereo file into left-mono-right and adjust thier indevidual volumes and then you could export the mix missing the mono altogether.
... there will still be vocal artifacts though.

waves p-ins work for 15 days before you need to purchase them to use again, and they're NOT CHEAP!

hustle and bustle if you go this route and don't have that kind of money ready to be spent.

try the logic method first, don't get hooked on the waves stuff, too much $ and not good for some of audio, sounds a little sterile. (it's like crack) 🙂

You can use a Gain plugin

with preset "invert phase left and mono" then export/bounce.

J

hehe... there's an echo in here.
I'll blame it on Space designer.
:P

oh, FYI: the kick drum and bass guitar is normally set center in a mix, you may eliminate the root of the rhythm section of the song you are working on if you do get the vocals out of the song.

just figured I'd state the obvious, most of us forget the consequences when we're on a "mission".

hehe... there's an echo in here.
I'll blame it on Space designer.
:P

An echo with far less content. Maybe a spcae designer with a BP Filter. : ^)

J

Bias Peak 4 is an application for cutting and mastering...

They supply some plugs from : mda

mda makes a little great plug call image....

In image u can controll the mono or stereo level: thus if u should please u can drag one fader down and all mono will disappear: then conver the stereo track to mono apply a little verb or room to make it stereo again - n there u go u have your karaoke track:-)))))

re: Image

http://www.mda-vst.com/

This particular plug is not yet AU, but you can use it with VST. It's free. I thought it was strange BIAS advertised freeware plugins.

J