Playing & recording on the same mac using a Firewire 410

What I want to do is record audio (my mixes) from traktor LE into another audio app...
i.e i have selected traktor to use ch3&4 for master output, i then want to patch this audio signal @ Ch3&4 in to an input (ch1&2) on the card so i can get a recording app like audacity or live to record the signal coming back in. Like using ASIO on a pc...
On the FW410 control panel there are a number of mixer settings to configure, software return being one of them... when i select the input chanels in the recording software there's never a signal at the expected input.
I havent tried to route the audio via hard wire from the output (ch3&4) back to the input (ch1&2) as i thought software would do the job...
Does anyone know how to operate this sound card, or is what i'm asking not possible?

That depends on the application in question.
Since all the data requests are coming from the same Mac, you don't have the issues you would have if you had two different machines talking at the same time.
However, it now depends on whether the application(s) you're using supports file locks.
As long as the application that's manipulating the data properly locks the part of the file it's working on, and that the application you're using to read the file reads the locks and knows whether or not it's OK to use that part of the file, you should be OK.

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