Check out the GrooveTool: http://www.renoise.com/tools/groovetool
Don’t know how well it works in 3.0, haven’t tried it yet, but it was pretty cool for 2.8.
I think the word ‘shuffle’ may cause some confusion as this is quite a specific term used to describe specific grooves, e.g. boogie-woogie piano or billy jean.
For the type of swing you are referring to you need to think like a drummer, and drummers tend to play either on, ahead or behind the beat. For a laid-back down tempo groove your best friend is lazy snares which you can achieve with random but low-value delay column values, say 0 - 30 max at 8 LPB. Hi-hats will need to be a little tighter as they are the principal time-keeper but can also benefit from delay column treatment. To give context there will need to be a couple of elements that are pretty bang - on the beat for example the first kick of each bar.
Checkout the humanize tutorial demo song for good examples of this and try halving the tempo.
SPAM ALERT!
I`ve just released a new tool which I am finding really useful for exactly this. Volume can be equally important with regards to ghost notes and variation.
The tool can nudge notes above the current line aswell using the delay nudge buttons. Feel free to test:
First learn how to use dblues slices to pattern here. You can then see the groove of a break, some are quite dramatic.
Then in the track next to this you can use you own similar sounds and copy the groove delays.
Heh, coincidence… just earlier today i was calculating stuff for 3:4 and 4:3 polyrhythms in renoise, here’s a text file with a few notes of the results:
Note Time offset Col. Delay
------
0 -- 000.000 -- 00 00 *
1 -- 341.333 -- 01 55
2 -- 682.666 -- 02 AA *
3 -- 1024.000 -- 04 00
4 -- 1365.333 -- 05 55 *
5 -- 1706.666 -- 06 AA
------
6 -- 2048.000 -- 08 00 *
7 -- 2389.333 -- 09 55
8 -- 2730.666 -- 10 AA *
9 -- 3072.000 -- 12 00
10 -- 3413.333 -- 13 55 *
11 -- 3754.666 -- 14 AA
------
12 -- 4096.000 -- 16 00
4:3 T RL R LR | T RL R LR | etc...
3:4 T LR R RL | T LR R RL | etc...
…and a “proof of concept” xrns i bunched up together =)