Today, Wednesday, March 17, is the date that Austin's South by Southwest fest transitions from a focus on film to music, bringing thousands of artists and spectators from around the world to downtown Austin for four days and nights of every imaginable type of music.

The music festival and conference held at SXSW for 16 years now, is the event of the year where musicians and bands, press and bloggers, spectators and fans, record industry executives, music scouts and agents, and so on, gather in conventions, centers, music halls, bars and clubs, churches and museums, backyards and roof tops to play, listen to and chronical more music than is ever possible to hear.

At anytime of the day or night, there are dozens and dozens of bands playing at venues throughout downtown Austin. SWSX organizers say there are more than 1,700 artists and bands scheduled just for the official showcases. However, there are also hundreds of unofficial SXSW events. Relatively unknown artists perform in pizza joints, hotels and cafes; better known bands perform at the top venues, such as Stubb's, Emo's and The Galaxy Room.

Wednesday will be a big day for places like The Galaxy Room (508 E 6th St.), which features two stages (inside and outstage) will host shows from Roman Candle, Free Energy, Freelance Whales, Suckers, Carolina Chocolate Drops, Roky Erickson with Okkervil River and Frightened Rabbit.

"Generator First Floor" - Freelance Whales

"Lost Coastlines" - Okkervil River

"Heads Roll Off" - Frightened Rabbit

Red 7 (611 E 7th St.) a few blocks away will host the SXSW Terrorbird/Force Field Day Party with shows (inside and outside) from The Fresh and Onlys, A Sunny Day in Glasgow, Toro Y Moi, Inlets, Beach Fossils, Real Estate, Neon Indian, Choir of Young Believers and The Rural Alberta Advantage.

"Terminally Chill" - Neon Indian

"Action Reaction" - Choir of Young Believers

The Fader Fort (1001 E. 5th St.) is featuring shows from We Were Promised Jetpacks, Free Energy, Freelance Whales, Visqueen and others.

"Conductor" - We Were Promised Jetpacks

Not far away at Emo's (603 Red River St.), showcases include The Morning Benders, Titus Andronicus, Japandroids and The Black Angels.

"Excuses" - The Morning Benders

"A More Perfect Union" - Titus Andronicus

Just up the street at The Mohawk, there's an all-day showcase that includes White Demin, Besnard Lakes, Washed Out, Small Black, Royal Bands and Phantogram, to name a few.

That's just a sampling of the day shows for Day One of SXSW 2010. Stay tuned for more about night showcases that include The Walkmen, Broken Bells, Here We Go Magic, The Middle East, Califone, Fanfarlo, Princeton, Surfer Blood and more.