"We wrote a song called Black Crow, which is on the record, and we wrote that in a day," he says. "I'm a huge fan of Raphael Saadiq and Solange who he's worked a lot, and I just wanted to follow that up, so I got back in touch with Steve after the camp and said, 'Hey man, I would love to write more with you'."
Baker describes Rusch's style as "flow-oriented."
"There's definitely strategy and plan in there, but he's really good at calmly following whatever's working in a nice way. He's pretty intuitive when it comes to what we should track first."
Black Crow's funky beat almost acts as a Trojan Horse for its dark, emotional lyrics, which reflect on the way depression can feel like a relentless presence overshadowing one's day-to-day life. "It was a weight I was feeling at that time," says Baker.
"The first lyric is 'Bathe my hands in indigo,' and there's an old Japanese proverb which says that the more times you bathe a garment or cloth in indigo, the richer the colour becomes. And that's a metaphor for life; the more things you go through, the deeper you have a look on life.
"It definitely comes from turning the shit into something good," he says. "It's definitely around the "D" word, in terms of its conceptual nature, and I wanted to write something to start that dialogue a bit more, and to inspire people hopefully a bit more."
Baring himself emotionally in that song has proven to be an intensely rewarding experience, he says.
"The amount of people that have come back to me in a really genuine way and said how positively or how good it's affected them, and how it made them cry; it's been real special to know that writing a song, having ideas in your brain, and then all of a sudden it's a song, and all of a sudden people are listening to it and getting something good from it - it's pretty profound to think that people do that," he says.
"That artists create that kind of thing which stems from their own hearts, to creating a better connection or a stronger unity or whatever it is, it all makes a difference."
LOWDOWN:
Who: Louis Baker
What: New album Open
When: Out now
Also: Baker is taking the Open tour to Christchurch's Blue Smoke on August 8; Auckland's Tuning Fork on August 9; Wellington's San Fran on August 10.