Vancouver's iconic industrial rockers Skinny Puppy have invoiced the U.S. government upon hearing that their music was being used as a "torture device" on prisoners at Guantanamo Bay.

Music has long been used as a wartime torture device. George Bush Sr. famously blasted Van Halen's "Panama" to drive Panamanian president Manuel Noriega from his refuge at the Vatican embassy. Then he turned the volume up to 11 during the first Iraq War, infamously playing Metallica and AC/DC.

"These people haven't heard heavy metal," a sergeant said at the time. "They can't take it. If you play it for 24 hours, your brain and body functions start to slide, your train of thought slows down and your will is broken. That's when we come in and talk to them."

Metallica was used again during the War on Terror "to induce sleep deprivation, prolong capture shock, disorient detainees during interrogations - and also drown out screams." (Eminem and Barney the Dinosaur also got some spins.)

In 2009, Metallica's drummer Lars Ulrich told Rachel Maddow they didn't "advocate or condone" their music being used for torture, while noting, "If there are people that are dumb enough to use Metallica to interrogate prisoners, you're forgetting about all the music that's to the left of us. I can name, you know, 30 Norwegian death metal bands that would make Metallica sound like Simon and Garfunkel."

Story continues after slideshow:

Loading Slideshow...
  • "Enter Sandman" Metallica

  • "Bodies (Let The Bodies Hit The Floor)" Drowning Pool

  • "Shoot to Thrill" AC/DC

  • "Hells Bells" 'AC/DC

  • "I Love You" Barney the Dinosaur

  • "Born In The USA" Bruce Springsteen

  • "Babylon" David Gray

    .

  • "White America" Eminem

  • "Sesame Street Theme"

  • Al Jazeera World - Songs of War

Well, it looks like the U.S. military listened, and they may have moved on to the harder industrial sounds of Skinny Puppy.

That's what the band's founder cEvin Key claimed in an interview with the Phoenix New Times discussing their 2013 album "Weapon."

"We had a cool concept on the record because we heard through a reliable grapevine that our music was being used in Guantanamo Bay prison camps to musically stun or torture people. We heard that our music was used in at least four occasions. We thought it would be a good idea to make an invoice to the U.S. government for musical services, thus the concept of the record title, 'Weapon.'"

While Key says they never sent the invoice ("the album cover is the invoice") he reiterated that they were none too happy about how their music was allegedly being used.

"We never supported those types of scenarios. It's kind of typical that we thought this would end up happening, in a weird way. Because we make unsettling music we can see it being used in a weird way. But it doesn't sit right with us."

If they had sent the invoice, they may have had a legal leg to stand on. In a blog post titled "Is Torture by Music a 'Performance in Public'?," Canadian copyright lawyer Howard Knopf argued yes.

"Certain collectives are quick to collect money from those in nursing homes, hospitals, prisons etc. on the basis that these are 'public' places. Never mind that the audience is captive and it's their home, like it or not...

"Leaving aside the legal niceties about whose law if any applies in that dreadful place, one can only wonder if ASCAP might not want a piece of the action. After all, it went after the Girl Guides not so long ago. And if it could try to make a buck off Girl Guides, who are nice people, why not alleged terrorists? Why should terrorists enjoy free music?"

Also on HuffPost:

Loading Slideshow...
  • Camp X-Ray's Famous Photo

    This Jan. 11, 2002, photo was <a href="http://www.miamiherald.com/2008/01/10/375017/photos-echo-years-later.html" target="_hplink">one of the most infamous</a> taken at Guantanamo's Camp X-Ray. The photo was released by the Department of Defense on Jan. 18, 2002.

  • Camp X-Ray In 2013

    The location of that well-known photo seen during an April 19, 2013, media tour. The facility has been out of use for more than a decade.

  • Marine On Patrol In 2002

    A U.S. Marine on patrol walks in front of the buildings where Camp X-Ray detainees were interrogated on Feb. 6, 2002.

  • Camp X-Ray Interrogation Buildings

    As seen in 2013.

  • Rumsfeld's Camp X-Ray Tour

    Defense Secretary Donald Rumsfeld (left) speaks to the news media at Camp X-Ray on Jan. 27, 2002.

  • Camp X-Ray Tour In 2013

    A military press official opens the gate to Camp X-Ray for members of the media.

  • Detainee Transferred On Gurney

    U.S. Marines transport a detainee on a gurney in Camp X-Ray on Feb. 6, 2002. Many of the then-156 detainees were transported through the base on a stretchers for security reasons.

  • Camp X-Ray Medical Building

    As seen in 2013.

  • Camp X-Ray Detainee Transported

    A prisoner is transported to an interrogation session at Camp X-Ray on April 24, 2002.

  • Camp X-Ray Cells

    As seen in 2013.

  • Camp X-Ray Detainee

    Guards escort a prisoner through Camp X-Ray on April 24, 2002.

  • Camp X-Ray

    As seen from a guard tower in 2013.

  • Camp X-Ray Guard Tower

    U.S. security forces guard Camp X-Ray on April 17, 2002.

  • Camp X-Ray Guard Tower

    As seen in 2013.

  • Detainees At Morning Prayer

    Detainees prepare themselves for the evening prayer by facing toward Mecca on March 4, 2002, at Camp X-Ray.

  • Banana Rat Climbs Camp X-Ray Fence

    Cells that used to house detainees host wildlife in 2013.

  • Camp X-Ray Detainee

    A detainee is walked by two U.S. Army MPs on March 2, 2002, at Camp X-Ray.

  • Camp X-Ray

    As seen from a guard tower in 2013.

  • Camp X-Ray In 2002

    A U.S. Marine stands guard outside Camp X-Ray on Feb. 7, 2002.

  • Camp X-Ray In 2013

    An abandoned guard tower.

  • Camp X-Ray Guard Sheds

    As seen in 2013.

  • Camp X-Ray Shed

    Table and chairs seen inside an abandoned shed in 2013.

  • Overgrown Camp X-Ray Pathway

    Tall grass growing inside Camp X-Ray in 2013.

  • Camp X-Ray Cells

    A tree grows over cells at Camp X-Ray in 2013.

  • Camp X-Ray Guard Tower

    As seen in 2013.

  • Camp X-Ray In 2013

  • NEXT: Inside Guantanamo Bay Prison

  • Guantanamo Guard Tower

    Located between Guantanamo's Camp Five and Camp Six.

  • Guantanamo detainee received physical therapy

    A skinny Guantanamo detainee receives physical therapy on Tuesday, April 16, 2013.

  • Empty cell block

    A cell block at Guantanamo's Camp VI that had been occupied until a raid on April 13, 2013. One detainee had written "stop tortur us. stop desclate our relgion" on the wall of his cell. The officer in charge of the facility said that detainees had hoarded all types of materials in the communal area.

  • Guantanamo Camp VI video feeds

    A Guantanamo guard looks over a video screen at Camp VI at Guantanamo in April. Detainees had blocked 147 of the prison's 160 cameras, according to a military official.

  • Weapons

    Water bottles filled with gravel were amongst the weapons officials said they confiscated from detainees after the raid in April.

  • Weapons

    Other weapons included broom sticks and shanks.

  • Occupied block

    A guard checks on detainees in a sparsely populated block of Guantanamo's Camp Six in April.

  • Guantanamo Medical Facility

    Military officials show journalists the room where some detainees were being force fed during the ongoing hunger strike at the facility.

  • Force Feeding chair

    A restraining chair used to feed detainees at Guantanamo.

  • Cans of Ensure at Guantanamo

    A guard displays cans of Ensure used to force feed detainees at Guantanamo.

  • Detainee handprint

    A handprint is shown on a Camp VI cell block that was occupied by a detainee until a raid in mid-April.

  • Detainee shoe

    A shoe from a detainee left on the now-empty cell block.

  • Shower camera

    Cameras are everywhere in Guantanamo's Camp VI, even inside the shower.

  • Cell block

    The second level of an empty cell block in Camp VI as seen from below.

  • Camp VI Sign

    A sign outside Guantanamo's Camp VI.

  • Guantanamo Flag At Half Staff

    A flag flying over Guantanamo's Camp Six flys at half staff in honor of victims of Boston Marathon massacre.

  • Camp Five Guards

    Guards at Camp Five stand watch during morning prayers.

  • Camp Five Cell Block

    An empty cell block in Guantanamo's Camp Five.

  • "Splash" Shields

    Face shields intended to prevent guards from being hit in the face by "cocktails" of urine, feces and semen.

  • Water handoff

    A guard hands water to a detainee on the Bravo block of Guantanamo's Camp Five.

  • Dead Banana Rat

    A dead banana rat on the road to Guantanamo's prison facilities.

  • Sunrise By Guantanamo's Camp Five

  • Obama, Hagel On Joint Detention Group Board

    President Barack Obama and Secretary of Defense Chuck Hagel pictured at the headquarters of Joint Task Force Guantanamo's Joint Detention Group headquarters.