Volca Sample Recording Issues

[harry97uk]

Trying to record Korg Volca Sample into Logic Pro X. My Volca is connected by headphone jack to trs cable into a Lexicon Alpha that is connected to my laptop. I have changed the preferences in Logic so that the input and output is through the Lexicon (Speakers connected to Lexicon as well). When I try to record the Volca Sample it tells me:

"Error while trying to synchronise Audio and MIDI"
"Sample Rate 29375 recognised"
"Check conflict between Logic Pro X and external device"

Then I get loads of glitches and clicking and whatever Audio I manage to recover is too fast and awful. I have tried closing any running applications and increasing the I/O buffer size but nothing.

Any help would be greatly appreciated!