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计算机游戏市场的繁荣使PC附加音响卡的需求大增.现在,PC音响正在向商业市场大举进军.据统计,1992年音响卡的销量是1991年销量的3倍,1993年的销量又增加1倍,达到500万个.估计到1996年,10%的PC将具有音响功能.一、PC音响集成电路当前的PC音响系统依赖于两类集成电路:声音编码器和音乐合成器.前者包含有A/D、D/A转换器,混合器,滤波器,放大器,以及各种数字接口和控制功能.它能够记录和重放数字化的声音,其主要特性是分辨率(以位计)、取样速度/和信噪比.后者是根据电子乐谱来重放音乐声,而不是利用数字化的声音来重放音乐.它所需的数据只有后一种方法的1/1000.一个合成器能同时产生许多声音(音符)和音色(乐器类型).二、标准化问题
The boom in the computer game market has greatly increased the demand for PC add-on audio cards. Nowadays, PC audio is making a big push into the commercial market. According to statistics, in 1992, the sales volume of audio cards was three times that of 1991, and in 1993 sales increased by another one. Times, up to 5 million. It is estimated that by 1996, 10% of PCs will have audio functions. First, PC audio integrated circuits The current PC audio systems rely on two types of integrated circuits: voice encoders and music synthesizers. The former contains A/D, D/A converters, mixers, filters, amplifiers, and various digital interfaces and control functions. It is capable of recording and replaying digitized sounds. Its main features are resolution (in bits), sampling, Speed / and SNR. The latter is based on electronic scores to replay music sounds, rather than using digital sounds to replay music. The data it needs is only 1/1000 of the latter method. A synthesizer can simultaneously Produce many sounds (notes) and timbres (instrument type). Second, standardization issues