Seo Taiji maintained his nu metal sound in his third solo album, "7th Issue". However, unlike "Ultramania", "7th Issue" was recorded mostly on a dropped C tuning, which gave the effect of the album sounding like one long song. Nevertheless, it had no problem attracting attention to a wide range of audiences. "7th Issue's" catchy rock tune made his fans call it "punk rock". Also, he obviously added Drum and Bass sound into his several songs, so that it proved him to be a favorable electronica musician (skills he learned from producing the "Seo Taiji and Boys" albums). J from Luna Sea also participated in the making of this album as the bassist. His song "Live Wire" was a good hit succeeding the vivacity of "Ultramania". "Robot" deals with his youth and anguish, while the song "F.M.Business" acrimoniously criticize the issues of and the commercialized music business and the artist exploitation from greedy corporate record labels. He also touches on the issue of abortion along with sexism and sexual assault with the song, "Victim". His record sale was reduced to a half million due to on-line downloading services, but was still the highest selling record of 2004 in South Korea. Taiji proved himself to be a musician in top popularity for more than a decade. After being active up to 2005, he once again suddenly disappeared out of the spotlight.