December has not been very kind to music company EMI Group PLC (OTC: EMIPY) and its new owners, the private equity group Terra Firma, led by Guy Hands. The company has come under fire from former artists like Paul McCartney and Radiohead, and it is now rumored that current artist Robbie Williams is looking to go elsewhere after the release of his next album.

Paul McCartney, that famous Beatle, recorded with EMI for 45 years before ditching the label earlier this year to sign a one-album deal with Starbucks Corporation (NASDAQ: SBUX) Hear Music label, then a new creation. McCartney came out last week and vented his dissatisfaction with EMI, though his comments were about the company before Terra Firma bought a majority holding. In an interview with The Times, the former Beatle "accused EMI of being unimaginative" in the demands that he market the album by speaking to multiple journalists and giving EMI at least six months to market the album. McCartney also bashed the excessive time for marketing by comparing his situation to former band mate John Lennon's success at releasing a song in 1970 within a week of recording it. Reportedly, Guy Hands agrees with these sentiments about EMI under former CEO Eric Nicoli, but that does not change the fact that artists since the takeover have voiced similar concerns.

In the same queue, Radiohead has now come out slamming Terra Firma's policies and pushes at EMI since the takeover. If you remember, Radiohead created quite a stir in the music industry, the blogging world, and news outlets, after announcing in early October to immediately release In Rainbows, the band's seventh album, as a digital download first. Since then, the band has signed deals to release the album physically as a CD, but not with the band's longtime label EMI. The band's guitarist Ed O'Brien recently gave an interview to BBC "claiming that [Terra Firma] do not understand the music industry." Apparently, EMI was the band's first choice to release the album, but the new owners were unwilling to give the band what they wanted, and "didn't understand where a band like us sat on a label like EMI, so they weren't able to give us what we needed." Front man Thom Yorke mirrored these sentiments commenting, "now you're in a situation with private equity firms, [Terra Firma] looks at music as something to buy and then sell on."

The Associated Press is asking a question that is practically blasphemous -- the outcome of which could change the face of the music industry: Are record labels really necessary, especially for established artists?

With acts including Madonna and Radiohead forgoing traditional record deals, and international superstar Robbie Williams signing a complicated deal guaranteeing him 80 million pounds over four albums, including some revenue from live events, it's clear that the the traditional concept of labels signing artists and paying them royalties is changing. Radiohead has decided to make its album available online only and let fans decide how much to pay.

Some argue that these are exceptions -- traditional record labels are still a must for all but the most established acts. Yet even lesser-known acts can promote their music on sites like MySpace and Facebook, which allow users to feature the songs they like on their pages. A lot of young people get introduced to music this way, forgoing outlets like MTV and the radio, which are seen as too commercial and passe.

The shift probably will be gradual, with better-known acts making the leap first. But as the methods of music distribution and hit-making change, so too will the role of the record label. Long term, I think that role will become a lot less relevant.