Making a list of the best rock albums ever is easy: Something old (the Beatles), something new (or newer; perhaps Radiohead), something borrowed (the Rolling Stones’ blues or disco pastiches) and Joni Mitchell’s “Blue.”

And, of course, bursting into the top 10 — and often higher — of any respectable list: “Pet Sounds.”

The overwhelming brainchild of Brian Wilson, the Beach Boys’ chief songwriter whose death at 82 was announced on Wednesday, “Pet Sounds” is beautiful — with gorgeous vocal harmonies, haunting timbres and wistful lyrics of adolescent longing and estrangement. It was a landmark in studio experimentation that changed the idea of how albums could be made. But one thing that stands out about the Beach Boys’ masterpiece is how gradually it came to be widely celebrated, compared with many of its peers.

“When it was released in the United States,” said Jan Butler, a senior lecturer in popular music at Oxford Brookes University in the United Kingdom, “it did pretty well, but for the Beach Boys, it was considered a flop.”

Released in the spring of 1966, “Pet Sounds” represented a break from the catchy tunes about surfing, cars and girls that the group had consistently rode to the top of the charts. The opening track is called “Wouldn’t It Be Nice,” but previous Beach Boys songs had described how nice it was.

The album peaked at No. 10 — low for one of the most popular acts at the time — and was the first Beach Boys album in three years not to reach gold status, Butler wrote in a chapter of an academic book. The Beach Boys’ record company, Capitol, rushed out a greatest-hits that outsold the album of original music.