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Stereo listeners are much more likely to integrate analog sources—turntables, reel-to-reel tape, and old-fashioned radio tuners—into their systems and to resist converting that pure analog signal to digital so that it can be processed and room-corrected. Small, standmount speakers often benefit from uncorrected room modes to extend their range. In the two-channel world, things have proceeded much more slowly. Most work well, providing precise level balance, compensating for unequal pathlength differences, and correcting in-room frequency response for all the speakers. Today, some arrive installed in AVRs and preamp-processors others come as standalone devices or computer software. Audyssey was the first such utility to gain wide acceptance. Help quickly came in the form of setup utilities that required no knowledge of acoustics—only a willingness to position a microphone for a series of measurements and let the system do the rest. Its fans were expected to install several loudspeakers in a full-range setup that included at least one speaker—the subwoofer(s)—that functioned exclusively in the problematic bass region. Adoption of DSP-based speaker-and-room correction in home theater—a parallel universe to audiophilia—is almost universal.