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The SPARS Code is a three-position alphabetic classification system developed in the early 1980s by the Society of Professional Audio Recording Services (SPARS) for commercial compact disc releases. The code denotes which parts of the recording process were completed using analog equipment and which were completed using digital equipment, encompassing three areas: recording, mixing and mastering. The first two positions, representing recording and mixing respectively, may be either an "A" for analog or a "D" for digital; the third position, representing mastering, is always "D" on digital CDs. The system was first implemented in 1984. Due to increasing complexity of recording and mixing processes developed over the code's first decade of use, SPARS decided to withdraw endorsement of the code in 1991 because they felt the code was overly simplistic and did not accurately reflect the complexity of typical recording and mixing processes in use at the time. However, many record labels continued to use the code and SPARS decided to re-endorse the SPARS code in 1995. ==History== Chris Stone and other members of the Society of Professional Audio Recording Services (SPARS) proposed the code with a set of guidelines for CD manufacturers to mark their product with an indication of exactly which parts of the recording process were analog and which were digital. The SPARS code was first introduced on commercial CD releases by PolyGram in 1984. Although the code usually applies to an entire compact disc release, certain releases may carry more than one SPARS code, such as Celine Dion's album ''Unison'' (1990) which carries both the AAD and DDD codes due to variances in the production process of certain songs. SPARS withdrew endorsement of the code in 1991 because many SPARS members felt the code oversimplified an increasingly complex audio production process.〔 However, many labels continued to use the code, so SPARS re-endorsed the code in 1995.〔 The SPARS code has also been applied to many vinyl record releases; for these the third position of the code, representing mastering, is always "A". 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「SPARS code」の詳細全文を読む スポンサード リンク
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