Since installing Ubuntu on my 2014 Macbook Pro w/Retina display I had two major gripes with Renoise:
1. No pulseaudio output without doing weird shit like abusing alsa loopback (xruns everywhere) or sensible shit like setting up jack (no excuses here, just not for me).
2. Poor HiDPI support - Renoise basically illegible & unusable on 2880x1800 display @ 220ppi
Today I think I finally have this sorted out, at least to my satisfaction. FWIW these are both pretty hack solutions in their own right but they work for me
To fix "no pulseaudio output":
Just run Renoise in Wine. In preferences you will see a "Pulseaudio" audio output option. All audio from your other applications will continue to work.
To fix "poor hidpi support":
NOTE: This is an Ubuntu-specific solution, sorry!
Install compiz-plugins to get "Enhanced Zoom Desktop" (http://wiki.compiz.org/Plugins/Ezoom)
Install compizconfig-settings-manager to configure the plugin (https://apps.ubuntu....ttings-manager/)
Bind keys to "Zoom In", "Zoom Out" and "Toggle Zoom Area Lock"
So my flow is:
Run Renoise in Wine from desktop shortcut
Zoom in to Wine's configured resolution
Hope this helps somebody! I wish there were improved support for these items in Renoise but I understand that both of the issues I experienced stem from deeper issues in the Linux community.