Editing Probot (section)

==Production and style==
{{Tall image|Probot guitarists.jpg|165|693|From top to bottom: [[Kim Thayil]] and [[Matt Sweeney]] played additional guitar parts on the album. [[Conrad Lant|Cronos]] and [[Lemmy]] played bass guitar on the songs they sang, while [[Scott Weinrich|Wino]] and [[Jack Black]] played guitar on the tracks on which they sang.}}
On the album, Grohl teamed up with heavy metal vocalists from 1980s and 1990s bands who influenced his musical tastes while he was growing up. Similar to 1995's ''[[Foo Fighters (album)|Foo Fighters]]'', Grohl wrote all of the music and performed most of the instrumentation. Each track on the album features a different lead singer including [[Lemmy]], [[Max Cavalera]], [[King Diamond]] and [[Tom Warrior]]. Grohl described the sequencing as "like a compilation tape that I would have made as a kid."<ref name=bill>[https://books.google.com/books?id=hA8EAAAAMBAJ&pg=PA19 DIY Spirit Led Grohl's Probot to Indie Label],  Billboard</ref>

Only Lemmy and Wino visited Studio 606 to record, with all the others sending tapes from studio to studio until the album was finished. [[Soundgarden]] guitarist [[Kim Thayil]] plays additional guitar on two tracks thanks to Kasper, who had brought the Probot tapes to Seattle and they attracted Thayil's interest. Grohl was pleased with the addition as Thayil had more experience with [[lead guitar]]s, while Grohl was "more about the [[riff]] and the [[rhythm guitar|rhythm]]".<ref name=gw/> A bonus track titled "I Am The Warlock" was provided by comedian/actor/musician [[Jack Black (actor)|Jack Black]]. According to Black, who described the song as "a homage to '[[Iron Man (song)|Iron Man]].'" after Grohl approached him regarding writing lyrics, Black's wife [[Tanya Haden]] suggested "it should be about a fucked up relationship," so Black made it about a [[Magician (fantasy)|warlock]].<ref>[http://www.fooarchive.com/probot/probot_jbkerrang.jpg Black and Grohl: Back together]</ref>

Grohl also approached [[death metal]] legend [[Chuck Schuldiner]] of [[Death (metal band)|Death]] to contribute to Probot. However, Schuldiner was struggling with [[brain cancer]] and was unable to be involved despite the efforts of Grohl and others to raise funds for his medical treatment.<ref>[{{BillboardURLbyName|artist=chuck schuldiner|bio=true}} ''Chuck Schuldiner: Biography'', Billboard.com], (retrieved February 18, 2011)</ref> Grohl also attempted to get [[Slayer]]'s lead singer [[Tom Araya]] on the album, but scheduling conflicts prevented collaboration.<ref>[http://www.blabbermouth.net/news/dave-grohl-explains-tom-araya-s-absence-from-probot-cd/ ''Dave Grohl Explains Tom Araya's Absence From Probot CD''] Jan. 11, 2004 [[Blabbermouth.net]]</ref> Grohl subsequently invited [[Kurt Brecht]] from [[Dirty Rotten Imbeciles|D.R.I.]]<ref name=visions>[http://www.fooarchive.com/features/visionsprobot03.htm The Fan Has Won]</ref> Grohl mentioned he and Sweeney had discussed and considered a lot of different singers, including the retired Jeff Becerra of [[Possessed (band)|Possessed]], [[Chuck Billy]] from [[Testament (band)|Testament]], [[Pantera]]'s [[Phil Anselmo]], and the vocalists from [[Kreator]], [[Destruction (band)|Destruction]], [[Hirax]] and [[Candlemass (band)|Candlemass]].<ref name=ozzy/> Sweeney vetoed [[Unleashed (band)|Unleashed]]'s Johnny Hedlund, who at the time was rumored to be a [[Nazism|Nazi]] sympathizer.<ref>{{Cite news|url=http://www.blabbermouth.net/news/unleashed-we-are-not-nazi-sympathizers/|title=UNLEASHED: We Are Not Nazi Sympathizers!|date=2002-10-23|work=BLABBERMOUTH.NET|access-date=2017-08-01|language=en-US}}</ref>

In a 2007 interview for ''[[Guitar World]]'' magazine, Grohl was asked about the future of Probot. He explained that the idea behind Probot had been successfully realized and he doubted it would continue in any form.<ref>{{cite journal|date=December 2007|title=Dear Guitar Hero|journal=Guitar World|publisher=Future US|volume=28|issue=12|pages=78|issn=1045-6295}}</ref>