One of the musical highlights of the 2019 festival season was undoubtedly Tedeschi Trucks Band welcoming Trey Anastasio and Doyle Bramhall II to the stage at LOCKN’ for a near-complete performance of the classic Derek and the Dominos album Layla and Other Assorted Love Songs. On Monday, which marked the one-year anniversary of that performance, Tedeschi Trucks Band shared audio of the band rehearsing “I Am Yours” with the Phish guitarist just before the event.

LOCKN’ 2019 was a banner weekend for Anastasio, as he also joined “Thai-funk” trio Khruangbin onstage for a rare sit-in with a band that usually does not welcome guest performers (with the exception of Leon Bridges). During Anastasio’s headlining performance, he would also bring up Derek Trucks (and, later, Susan Tedeschi) to help take on his songbook, playing selection from the Phish, Trey Anastasio Band, and Ghosts of the Forest repertoires.

Related: SummerStage Jubilee Benefit Stream To Feature Trey Anastasio, Sting, Norah Jones, Rosanne Cash, More

In the audio shared on Monday, the group lightly rehearses one of the many easily-overlooked songs from Layla that the ensemble would bring back into the light of the main stage. As keyboardist Gabe Dixon and acoustic guitarist Mike Mattison harmonize on vocals, Trucks can be heard delicately doing what he does best on slide guitar. While the audio may be a little quiet, it shows just how much control this large band, which got even larger that weekend, has over its sound. TTB said of the rehearsal along with the audio,

One year ago today, TTB hit the stage with Trey Anastasio and Doyle Bramhall II at LOCKN’ Festival for a very special performance of the Layla album. Here’s a moment you haven’t heard before: TTB’s rehearsal of “I Am Yours” from a few days before the show. Their second run-through was so sweet and sung so beautifully by Gabe Dixon and Mike Mattison that the band and crew in attendance couldn’t hold their applause. Enjoy this a private musical moment that turned out too good not to share with the public!

Listen to Tedeschi Trucks Band rehearse “I Am Yours” with Trey Anastasio here.


View this post on Instagram


8/23/19 📷: @quarterroy

A post shared by Trey Anastasio (@treyanastasio) on