Progressive Electronic thrives in more unfamiliar territory. The styles that emerge are often dictated by the technology itself. Rather than sampling or synthesizing acoustic sounds to electronically replicate them, these composers tend to mutate the original timbres, sometimes to an unrecognizable state. True artists in the genre also create their own sounds (as opposed to using the preset sounds that come with modern synthesizers). In progressive electro-acoustic music, the electronics play an equal if not greater part in the overall concept. Acoustic instruments performed in real time are usually processed through reverb, harmonizing, or other methods, which adds an entirely new dimension to the player's technique. At best, this music opens up new worlds of listening, thinking, and feeling. At worst, progressive electronic artists worship technology for its own sake, relinquishing the heart and soul of true artistic expression.