This was originally an instrumental demo called "Twinkle Star" which cost Alpert $200 to record. Later when he decided to record it as a single, Alpert dubbed in crowd noises from a bullring in Tijuana, Mexico.
This was the first record issued by A&M Records when they were operating out of Herb Alpert's garage. He and Jerry Moss founded the record label earlier in the year.
The Lonely Bull was re-released in 2005 with re-mastered sound and extensive liner notes from Alpert.
Alpert recalled to Mojo December 2010: "I'd had a trip to Tijuana, watching the bullfights, and I tried to interpret that feeling I'd had at the fights into a sound. Of course, I was loaded on wine at the time."