Mom-and-pop stores are dying, but a mom-and-son record store and art gallery has sprung to life in the Outer Richmond.

Called Noise, it combines the hippie vibe of Sara Johnson, 58, with the hepcat cool of her son Daniel A.J. Brown, who is 27 and blows the tenor sax. They opened their shop last fall to sell vinyl in a shoe-box-shaped storefront that glows from the weak red neon of the Balboa Theatre nearby.

Walk into Noise and you will be in the 1940s-’50s if Brown is spinning bebop and the 1960s-’70s if his mom is spinning rock from the San Francisco scene she grew up in. There are vintage turntables for sale in a glass case and a working one on the glass countertop.

The stock of 7,000 LPs and 78s represents all styles, classical to funk, and they will all be represented live when Noise sponsors four bands during Playland on Balboa Street, a free arts and music festival on Saturday, April 16.

Drop in and mention to the proprietor that most 27-year-olds don’t know what a record is, and Brown just smiles. “I’ve got a lot of friends who are into it,” he says, “DJing and stuff.”

Noise doesn’t have a computer, or even a cash register. Receipts are written by hand, and change is made from a cash box. The only hints of modern times are a smartphone for credit card charges and the lonely tower of CDs banished to the corner.

“This is all Daniel’s idea,” says Johnson. “Everything in here, the furniture, the whole look of the shop is his.”

Brown, who attended School of the Arts, has been a “working musician since he was 12,” his mom says proudly. Brown has performed for Dave Brubeck and Stevie Wonder, and regularly plays with Marcus Shelby, Lavay Smith and Steve Lucky. He keeps jazz hours, and weekdays the store doesn’t open until 3 p.m. If he has to leave for a performance, his mom takes over. If she can’t do it, his sister, Sara Brown, 23, works the counter.

There is no decline in musical expertise during this shift change. Johnson is a classically trained pianist who taught her kids to read music at the same time she taught them the alphabet. Both kids play multiple instruments and took lessons at the Community Music Center in the Richmond.

On Sunday afternoons, all three are in the store to host a jazz jam that is drawing musicians and fans from all over the city and the Bay Area beyond.

“It’s an addition to the neighborhood that you just dream will happen,” says Chris Dugan, a 63-year-old jazz musician spending a recent rainy Sunday afternoon at Noise. “This is the best straight-ahead jazz played by younger people that I’ve seen, and I’ve been in New York. I’ve played all over the world.”

The stage is at the back of the store. A piano, drum kit, stand-up bass and two horns fill the narrow space corner to corner. Brown, the bandleader, calls out a tune and finger-snaps the beat to “This I Dig of You,” by Hank Mobley, from 1960.

The bass and drums lay a foundation. The pianist starts tinkling, and when the horns come in, the sound carries out over the front row of seating, which is a full-length couch, through the shoppers at the bins and out the door to the sidewalk where the smokers are.

The set ends and Brown puts down his 1949 King Zephyr sax and heads outside to join them, stopping to put “Welcome Home” by Osibisa on the turntable.

“I just wanted to bring the community together a little bit and try to bring music back to the neighborhood,” he explains of his motivation, during the break.

Brown grew up 10 blocks away and still lives at home with his mother, sister and his album collection. When the records overflowed his bookcase and onto the bed where he sleeps, he needed an outlet.

So he started selling records in the back of the Mysterious Rack, a knickknack store on Balboa at 36th. He got his own space when a former driving school turned art studio became available two doors down. Brown built the plywood bins himself, cribbed from plans he found online.

The art on display is co-curated by Johnson, who was a child model for I. Magnin and graduated from Lowell in 1975. She and her kids are Richmond to the core and have not forgotten where they came from.

Their pediatrician, Janet Stafford, has her oil paintings on the wall. Photos behind the counter are by Dennis Hearne, who has been shooting the jazz scene in the city since the 1960s. Large-scale surrealist paintings over the bandstand are by Vladimir Vitkovsky, whose studio is across the street.

When Noise opened in late September, it was just records and art. The Sunday jams were added in December.

“I play with a dozen different bands around town,” Brown says, “and I wanted to take advantage of the space. But it’s not a gig gig. Everybody is volunteering, at this point.”

One volunteer is nomadic Bolivian muralist Pablo Ruiz, who wandered in last summer and was so taken with the music and art that he offered to paint a giant wave on the facade of the store, onto the overhang and down the sides.

“The mural just says ‘Noise,’ not ‘records’ or ‘art’ or ‘music,’” says Johnson. “It makes people curious enough to come in and check it out.”

The band on this day is made up of Brown on tenor, Nick Culp on piano, Lukas Vesely on bass, Scott Larson on trombone and Vijay Anderson on drums.

“It’s a vibrant scene. A lot of musicians come out here to support him,” says Larson, 42, who comes over from Oakland. On his way out the door, he shows his support by purchasing a 1950s Count Basie album and both “Beatles ’65” and “Magical Mystery Tour.”

Musicians come and go, and so does their audience, following the live sound across the street from Simple Pleasures Cafe, or up from the Balboa after a movie, or down from Shanghai Dumpling King, a fluorescent-lit restaurant that is sufficiently devoid of atmosphere to attract the intelligentsia.

Mission District residents Kevin Meehan and Maddie Raffel were coming out of Dumpling King when they followed the sound to Noise. At first they took it for a high school band, but the closer they got, the better it sounded.

“It’s unexpectedly good, super professional,” says Meehan, 28, who was compelled to stick around until the break, then thumb through the bins, where Raffel, 26, was immediately drawn to a record by her Palo Alto homie, Joan Baez.

“It’s hip now to go back to turntables and vinyl,” says Meehan, “but to pair live jazz with a record store, that’s new.”

Prices run from under $1 for a used copy of “The Twelfth of Never” by Richmond local Johnny Mathis, to $150 for a first pressing of “Mainstream 1958” by John Coltrane.

During Playland on Balboa, Noise will have rock and funk bands outside the store, jazz and classical inside. The next day it will be back to jazz, same hours, same price.

“This is a San Francisco treasure,” says Paula Tejeda, who comes every Sunday. “It’s why we continue living in the city.”

Sam Whiting is a San Francisco Chronicle staff writer. Email: swhiting@sfchronicle.com Twitter: @samwhitingsf

Noise: 3-8 p.m. weekdays. 10 a.m.-8 p.m. weekends. Live jazz Sundays 2-6 p.m. 3427 Balboa St, S.F. (415) 702-6006. www.sanfrancisconoise.com

Playland on Balboa Street: 2-6 p.m. Saturday, April 16. Balboa Street, between 35th and 37th avenues, S.F. Free. www .rdnc.org/playland-on-balboa

To experience a Sunday jazz jam at Noise, go to http://bit.ly/1WaSzUp. To hear Dan Brown describe Noise, go to http://bit.ly/1WtyqHc