Harrell told MTV News that he was thrilled to be asked to work on the album and was impressed with Rihanna's artistic process in the studio.

"They scheduled me to go out to Europe and start recording. It's an amazing process, working with her while she's on the road," he recalled. "It's great to see how she does a show every single night [and then records]. Sure enough at 2, 3 o'clock in the morning, I get the call - she's on her way."

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Harrell also had high praise for Talk That Talk's final sound, adding that he had no problem with Rihanna's ever-changing musical style as she is always ready to give it her all.

"At points, it's a combination of edgy and passionate at the same time, and when you listen to the album, it's just like Loud. She's at a place right now where her voice just sounds incredible, and she's such a great presence," he explained.

"It doesn't change anything for me... The goal is always getting the best performance out of her. So it's just a matter of making sure we capture the vibe of the record. If it's up and moving, we gotta make sure her performance matches that."