Task: Question Answering
Input (English): Passage: During the latter half of 2002, Sasha collaborated with big beat artist Junkie XL on the single "Breezer". Junkie XL, along with Charlie May, also assisted Sasha on his second album of original material, Airdrawndagger.  Airdrawndagger took several years to produce due to Sasha's desire for the album to be "as near to perfection as possible."  That March, Sasha suffered a perforated eardrum in a traffic accident, further delaying the album's production. Though the accident temporarily impaired his hearing, he drew inspiration for the album from his ordeal.  Airdrawndagger was finally released, in August 2002, to much fanfare. However, the album was "received with a lot of head scratching", according to Sasha, which he attributed to its unexpected mix of genres. The album did not feature the heavier "club sound" of Sasha's previous mix albums, bearing a closer resemblance to ambient music.  Airdrawndagger generally received favorable reviews, though critics noted that it was not as consistent and well produced as his DJ mixes. Sasha himself described it as "a selfish, slightly self-indulgent record", though he maintains that he is "happy with it to this day".  Some critics, however, called it "sleepy"; E!Online described it as being "more in league with Yanni than Moby".  To encourage listeners' interest, Sasha held an amateur remix contest for the album's single, "Wavy Gravy".  Due to the contest's success, Sasha released all the tracks from Airdrawndagger on his website, so that fans could download and create their own versions.After the release of Airdrawndagger, Sasha took the young DJ James Zabiela "under his wing". He introduced Zabiela to the CDJ1000 turntable, and signed Zabiela to the Excession talent agency.  The two toured the United States together, which extended Sasha's influence to already-popular American DJs such as Kimball Collins.
In 2004, Sasha signed with Global Underground to produce another mix album. However, he found the process of creating a standard mix album unrewarding, and decided to apply his production and DJing skills to a mix compilation that resembled a "real" album—that is, one featuring original material.  Sasha's next studio album, Involver, was "a fusion of mix album and production record", consisting entirely of Sasha's reworkings of tracks by other artists.  "I tried to take all the separate sounds to all the tracks [and recombine them]", he later explained, "and it allowed me to mix the tracks together on a much deeper level."  He accomplished this by sequencing the album using Ableton Live and Logic Pro.  Ableton Live is a music loop-based software package that Sasha uses to engineer tracks in real-time, whereas he used Logic Pro primarily for premeditated edits to audio tracks. 
Question: Whose album was "received with a lot of head scratching?"?
Output (English): Sasha.