"I'm going through another change" croons Psychic Ills' Tres Warren, only one song into Inner Journey Out. This earnest declaration, galvanised by the backing of a choir serves as a motif for the band's stylistic development. This recurrent allusion to change encapsulates the animating principle of the New York duo's latest release. The statement is irrevocably clear. This is a band whose evolution is founded upon personal introspection and an ongoing search for clarity in the mist of confusion.

Despite their departure from the improvisation laden territory occupied before 2011's Hazed Dream, the band have retained their easy, nonchalant sound. 'Mixed Up Mind', though embodying Psychic Ills' newfound introspection, is still embalmed within the acts characteristic haze of noise and typified by the use of touring keyboard player Brent Cordero's Farfisa. The move towards more conventional songwriting has been in no way of detriment to the band but has instead exhibited a progression towards clarity. Inner Journey Out, their maturest work to date, has made the starkest move in the direction of a more consciously formulaic approach to songwriting.

'New Mantra', with its ritualistic, tribal qualities is almost a retrospective glance to the band's stylistic origins. However, during the course of the album, such transitional instrumentals have now come to occupy a marked space instead of forming the entire structure of the oeuvre. Similarly, 'Hazel Green' and 'Ra Wah Wah' are symbolic of the thematic tissues that combine to form the body of the work. Inner Journey Out is a wide-spanning exploration both sonically and internally.

The sounds of confusion that had been externalised into the band's aural tapestry have been transposed into the lyrical themes of love, change and loss that run throughout. Where debut album Dins had afforded lyricism the role of minimal abstractions, they have lost their secondary quality and fortified the fullness of sound that the duo have seeked to achieve. As the album comes to a close, the repetition of "you're gonna miss me when I'm gone" is lacklustre and rife with pain. With all the tired bitterness of a forlorn lover, the end of the journey is inconclusive and irresolute, a reflection more honest and more human than the offering of any false epiphanies.

We caught up with Psychic Ills' Tres Warren before their show at the Lexington.

What would you say separates Inner Journey Out from your previous output?

I think it's more fleshed-out, we spent more time writing and recording it so I think there's a different result. The last couple of albums we made quicker so I think that's the main difference.

Has the formation of your sound been a conscious development or more of a natural progression?

Maybe both you know... but I guess a natural progression in the sense that I don't think anybody wants to do the same thing over and over again and maybe conscious in that regard as well. The new record still sounds like the band the same way the first album did. There's similar things about all the records but I don't want to make the same record every time.

What have been the main influences behind Inner Journey Out?

I guess more songwriting type stuff. I was listening to a lot of Dennis Wilson, Neil Young, Dion, Gene Clarke... stuff like that. I don't know if that comes through. To have a simple song with an ambitious production around it was kind of the feeling.

Apparently the album was almost never finished, what were the issues you encountered in the formative process?

It just took a long time. Sometimes you kind of get lost in something and you don't realise where it's at and you take some time off and go back to it and take stock of it... and do a little more. I think that happened a couple of times. We recording in New York and mixed in California two different times. It just took some time you know.

Obviously Inner Journey Out is the most explicitly personal album that you've put out, was making it cathartic or more troublesome?

I don't want it to sound like a dark record but maybe personal is fine. I don't know about cathartic but I guess it could be.

On the album there's a duet with Mazzy Star's Hope Sandoval, how did this collaboration arise?

That happened because we toured with Mazzy Star in 2013 after their new record. I like that band a lot and had talked about doing something with Hope. I wrote 'I Don't Mind' and sent it to her and she liked it a lot and sang on it. I think her voice is really one of a kind so I think it worked out perfectly.

Do you feel as if you've fully achieved what you set out to do with Inner Journey Out?

There are things about it I'd change but you can't do that forever, you have to kind of finish it, put it out in the world and see how people respond to it. I heard Neil Young say that one time and I'm a huge Neil Young fan. So if Neil Young has regrets about parts of his records then everybody else is fine.

What's next for Psychic Ills?

We're just going to be touring a lot and make another record. Maybe something a little more concise with not as many songs.

Do you have any ideas/concepts for the new record in mind?

There are some things left over from ˆ actually but I don't know if we'll use them or just start from scratch. It's hard to tell.

Inner Journey Out is out now on Sacred Bones.