Problems in pt le 7.4.2 when using external effect

[AdamKurutz]

Hello ,

Im using PT LE 7.4.2 on iMac 20 with Mbox 2.Today I tried to compress a track already recorded in PT,with my HW compressor.
So I set up a new audio track so I can record back the compressed signal I recieve.
I went LR Mbox2 out to comp,then LR Comp Out to Mbox2 In.
I routed the audio track as "In 1-2 and Out 1-2".
I hit record and then horrible noise started peaking in the track.When I un-recordenabled the track,the noise dissapeared.
It has nothing to do with the compressor,becasue i tried to do this without the compressor switched on - result the same.
Any help will be greatly appreciated.

Thank you ,

AK

[Phil Ogden]

It's a feedback loop (howl round). You'd need an interface with more I/O to do this safely.

http://www.myspace.com/philogg

[DigiTechSupt]

You can do this, you just have to mute the track you're recording to (thus not really being able to monitor what you're processing).