The Austin Heavy Music blog keeps us marinating in the molten lava pit of our town’s metal and hard rock scene, and now puts its horns where its fangs are with its first fest. Grok everyone from the melodic doom of the Well to the deathcrush weirdness of Rise Thy Ruin and pop-eyed thrash of the Blood Royale. Teethgrinders Rust, Destroyer of Light, Nazarene, and Ass also abuse amps and eardrums. 6pm, no cover.

One of the few drawbacks to Austin’s musical vibrancy is the nagging sense that you’ll never see it all. KUT/KUTX’s Austin Music Map offers a tech-savvy remedy to not being everywhere at once.

With the city as its geospatial canvas, AMM lets users click on tags that unveil an eclectic array of Austin music experiences presented through sound, video, and photos. One reveals a video of Patches King performing a toy piano concerto at the Castle Hill graffiti wall, while the next features a photo of Greg Ginn serenading the crowd outside Trailer Space Records. AMM users can also submit their own media.

“Everyone who lives here knows what a big role music plays in the everyday life of the city,” says AMM creator Delaney Hall. “We wanted to capture that.”

This Saturday, the AMM comes to life in the form of MapJam, a free, daylong show happening in venues all over East Austin. The nine-act bill of hourlong performances boasts everything from U-18 punk titans Residual Kid to stalwart conjunto combo Los Pinkys and indie orchestral ensemble Mother Falcon.

“There’s a point of entry for people to look for music, because they can just choose a place they’ve been to or would like to go,” says Mother Falcon violinist Maurice Chammah. “And it’s still got the democratic vibe of a Myspace or ReverbNation, but it’s also curated, so it can serve as an entry point for bands to find a wider audience through the trusting advice of people who spend a lot of time listening to music.”

Noon: Wood & Wire, Hops and Grain, Craft Brewery (507 Calles #101)

1:30pm: Mother Falcon, Tillery Park (801 Tillery)

3: Akina Adderley & the Vintage Playboys, the Historic Victory Grill (1104 E. 11th)

4:30: Riders Against the Storm, Hotel Vegas (1500 E. Sixth)

6: Conjunto Los Pinkys, the White Horse (500 Comal)

6: Residual Kid, Cheer Up Charlie’s (1104 E. Sixth)

7:30: Rosie Flores & the Riveters, Scoot Inn (1308 E. Fourth)

9: DJ Chorizo Funk, Tillery Park (801 Tillery)

10: El Tule, Tillery Park (801 Tillery)

H-town’s historic funkestra leads the Save Texas Schools march to the Capitol, 10:45am.

Seattle doom quartet, with Pinkish Black.

West by West Campus, UT’s answer to South by Southwest, makes its fourth annual pass with more than 40 local acts. The all-day (and night) festival stretches between four co-ops turned venues, and remains free. The architecturally twisted 21st Street Co-op acts as the center, hosting power-pop quartet Pompeii and country punks Guns of Navarone. P-Tek heads up the acts at the TV dotted French House, with art-folk sixpiece Salesman holding down the newly minted Marjorie-Daw. The singer-songwriter cull lands at Eden House, featuring Rebecca Butler without her Richards.