Rytm MKII. Audio-In issue / Sampling

ive subitted a ticket with elektron, but while thats pending, maybe someone here could have some insight…

my keyboard amp is turned up, analog sounds are good and at volume. sample source (my mac) is turned up. auxiliary is seated in the headphone jack and the jack into the L audio in is seated. input monitor is turned to yes. AUD L is selected, threshold is low, and main volume on rytm is at noon. yet i get zero sound. when i try it from my phone it at least picks up the sample i play, through the input monitor, but just very very faintly. no clue why this is happening. any ideas? same results with R audio in.