Logic cuts low frequencies when recording audio?

Question

I am using a Lexicon Lambda interface and a iMac running Logic Pro 9, when i try to rip vinyl from a single turntable or record a mix from my mixer logic cuts most of the low frequencies leaving a tinny sounding recording, i have tried recording using the same interface with a Acer laptop running both Cubase and Soundforge and all is fine, so it must be something in Logic's settings, probably something simple that i have missed most likely, anyone know what to do to stop this?

Answer 1

Sounds as though you are hearing the effect of the RIAA EQ curve (bass cut and treble boost) applied at the cutting stage to keep the cutter head excursion within manageable bounds. If you connect a deck directly to your computer, this is to be expected. However, a DJ mixture should correct for the EQ. Does it have more than one output? If so, see if changing output affects the sound. If not, does your interface have a 'phono' input? If so, this should provide the required compensation. Failing that, does anyone have a Linear Phase EQ preset to deal with the RIAA curve?