Speaking with Ultimate Guitar, guitar tech Trace Foster discussed his 40 year career working with artists including AC/DC, Aerosmith, Cheap Trick, Bon Jovi, Smashing Pumpkins, and more. Following is an excerpt from the interview.

Ultimate Guitar: You've been with AC/DC for quite a while now. We talked earlier about the longevity of the people who work with that band. What is it about that band that makes the crew want to stay with them?

Foster: "There are so many bands that are so disconnected from everybody and everything around them. Then there are bands like AC/DC, the perfect example of a band that understands what it takes to get stuff done. There is only one AC/DC. Angus does not soundcheck, AC/DC does not soundcheck. They walk on the stage, there's 60,000-80,000 people screaming at them when Angus hits the first chord and away they go. So it better be right.

Angus understands what it takes to make that happen and who it takes to make that happen, so they really rely on guys like me. It's a total mutual feeling. Their drum tech, Dickie (Jones) has been there since Back In Black – he got hired two days after Brian (Johnson) did! Why do you stay that long? Well, you're appreciated."

Ultimate Guitar: The AC/DC live rig is such a cool thing because it's so consistent night after night and you're using real amps.

Foster: "I've said it before, it's the easiest and the hardest job I've ever had, and I'll explain that to you. Angus (Young) basically has two guitars. He plays the same guitars night after night and he has the same 12 stacks on stage every night, so you'd think that's an easy gig. The problem is that every day is a new challenge – you're indoors or outdoors or it's cold or it's hot or it's raining or it's windy.

People don't understand that, for example, if it's cold out, sound does not travel. It will travel about three feet in front of the speaker and just die. When you have a guy who doesn't wear in-ear monitors and he relies upon sustain, well now that's a huge problem because you can't give him that thing he needs and you're struggling.

Every day, the amp guy (Simon Murton) and I go on stage and we bias the amps while I'm playing, because we push those amps way beyond where they should ever be pushed. We know damn well we're going to blow a few up now and then, but it doesn't matter. I have to be able to sustain a note at certain spots on that stage and it takes all 12 of those amps to make that happen. There are no ifs, ands or buts and there are zero excuses to not make that happen."

Read the complete interview here.

Back in September, AC/DC released a music video for their single, "Through The Mists Of Time", featured on the band's latest album, Power Up. Get the album here, watch the new clip below.

The video is a rock and roll museum tour through an exhibition of the band’s incredible history. Based on a concept by Angus Young, Director Najeeb Tarazi and creative director Josh Cheuse used footage shot by Clemens Habicht of each of the five band members in five separate shoots around the world. They then enlisted Mathematic, a Paris based visual effects studio, to combine all the elements so the band could take the stage together to perform the fan favorite from Power Up, almost one year to the day that the highly-anticipated album was announced.

Check out the BraveWords review of Power Up here.

Tracklisting:

"Realize"
"Rejection"
"Shot In The Dark"
"Through The Mists Of Time"
"Kick You When You're Down"
"Witch's Spell"
"Demon Fire"
"Wild Reputation"
"No Man's Land"
"Systems Down"
"Money Shot"
"Code Red"