XDR

XDR may refer to:

XDR (audio)

XDR (eXtended Dynamic Range, also known as SDR (Super Dynamic Range)) is a quality-control and duplication process for the mass-production of pre-recorded audio cassettes. It is a process designed to provide higher quality audio on pre-recorded cassettes by checking the sound quality at all stages of the tape duplication process. In this way, the dynamic range of audio recorded on an XDR-duplicated cassette can be up to 13 decibels greater.

History

XDR was originally developed by Capitol Records-EMI of Canada in 1982 as "SDR" (Super Dynamic Range). Capitol in the USA then adopted the system for its cassette releases that same year, renaming it "XDR".

Process

The XDR/SDR process involves many steps, the most prominent being:

XDR (video game)

XDR (エックス・ディー・アール) (short for "X-Dazedly-Ray") is a 1990 Japanese shoot 'em up game released for the Sega Mega Drive. It is a sideways scrolling shoot 'em up containing six levels.

Story

On the terrestrial planet Sephiroth, which is home to a variety of peaceful and prosperous advanced societies, an ancient evil has returned. A long time ago, a warmonger known only as Guardia was banished from the planet, but has finally returned with an entire space military. The Guardia Military soon invades Sephiroth and crushes its defenses with its long hardened space technology. Within time, a space fighter was developed to match the power of the Guardia Military. Based on Guardia’s unknown desire for destruction and its own might, the ship was named the "XDR", or "X-Dazedly-Ray".

Gameplay

Players piloted the titular ship through six different checkpoint-heavy levels, blasting various ground and sky forces. Rather than having Bomb weapons, the ship was equipped to fire a variety of different shots and smaller bombs. Players could collect power ups such as different firing weapons, ground-force bombs, a shield and Options, all of which were upgradable to three levels. Players could also change the ship's speed through four variations. Many of the end-level bosses required timed shots in exact hit points similar to Gradius.