A fine-print sentence in a ticket confirmation email for Garth Brooks’ sold-out Saturday show at the South by Southwest stage at Auditorium Shores makes it sound like fans will have to clear an additional hurdle to get into the event.

Garth Brooks announces a free show at Auditorium Shores during SXSW during a news conferenceon Friday, March 17, 2017. DEBORAH CANNON / AMERICAN-STATESMAN

After the standard terms and condition language about ID verification and re-entry into the venue, there’s a sentence about downloading and showing the Amazon Music App on your phone.

“Also, be ready to show your favorite Garth Brooks album via the Amazon Music App on your mobile device upon entry to the show.”

A confirmation email sent to a Statesman employee who got tickets to Brooks’ show. Highlights added.

Brooks, who famously shunned streaming sites like Spotify and Apple Music in the past in favor of his own service, ghosttunes.com, discussed his months-old partnership with the streaming service today during his SXSW keynote speech.

Brooks chose Amazon because of its reputation for catering to the customer, he said in the speech. He also liked that Amazon also still deals in CDs: “Anyone who tells you the physical world is done is probably someone who isn’t dealing with physical” product, he said.

More: Garth Brooks talks up Amazon deal and the value of songwriters at SXSW keynote

A representative from Amazon told the Statesman that the app download “isn’t mandatory, but a great way to listen to Garth before the show.”

More: Is this Garth Brooks SXSW tweet shameless? Let’s let the friends in low places decide

But simply downloading the app doesn’t guarantee access to its services. To do that, you have to buy a subscription from Amazon to link with your Amazon account— $7.99 a month or $79 a year for Amazon Prime members, and $9.99 a month for non-Prime members. Every one of Brooks’ albums is currently streaming on the service. Wal-Mart and Target have previously exclusively sold his albums upon release.

And what if you want a ticket for the show, but missed the noon release time? If you have $1,000, you might be able to snag a ticket or two.

Peter Blackstock contributed to this report.