How can I get the Justin time trainer app to play shuffle / swung 8ths?

[Beatup6String]

I can’t work out any way to get Justin’s TimeTrainer app to play sounds for shuffled or swung eights. The 4:2 pattern does straight eights and the triplets don’t let me ‘mute’ the ‘trip’. Does anyone know a way to make this work e.g. a config setting of some kind?

I’ve seen other threads suggest the SoundBrenner app but I really like all the other features in TimeTrainer and it supports the free stuff on the site.

[Beatup6String]

I get to respond to my own question!

I was lucky enough to have a private lesson with Justin recently, and asked him as we were wrapping up. He said that the ratio between long and short subdivision (called the “shuffle zone” in BG2 Module 13) isn’t a precise number, can vary from blues to blues, and rather than practicing to a metronome with one setting or a few different settings, I should keep listening to lots of blues, play along to different tracks and absorb the timing that way.