Found this data for the Digitakt and it of course works on the Rytm MKII also:
[note] [time value]
1 - 128
1/2. - 96
1/2 - 64
1/4. - 48
1/4 - 32
1/8. - 24
1/8 - 16
1/16. - 12
1/16 - 8
1/32. - 6
1/32 - 4
1/64 - 2
1/64. - 3
1/128 - 1