旧瓶新酒？乐之邦两代轩辕LT声卡对比

    而在Codec方面，这两块声卡保持了一致，均选用了Wolfson出品的WM8776。这是一块著名的高性能2声道Codec，而我们也已见过多次，例如刚才我们曾提到的莫邪Ⅱ Music。

轩辕LT 5周年纪念版

    它采用48引脚TQFP封装。据悉，它输出信噪比达到了108dB，而输入信噪比为102dB。

轩辕LT

● Wolfson WM8776详细参数

    * Audio Performance
    * 108dB SNR (‘A’ weighted @ 48kHz) DAC
    * 102dB SNR (‘A’ weighted @ 48kHz) ADC
    * DAC Sampling Frequency: 32kHz – 192kHz
    * ADC Sampling Frequency: 32kHz – 96kHz
    * Five Stereo ADC Inputs with Analogue Gain Adjust from +24dB to –21dB in 0.5dB Steps
    * Programmable Limiter or Automatic Level Control (ALC)
    * Stereo DAC with Independent Analogue and Digital Volume Controls
    * Stereo Headphone and Line Output
    * 3-Wire SPI Compatible or 2-Wire Software Serial Control Interface
    * Master or Slave Clocking Mode
    * Programmable Audio Data Interface Modes
    * I2S, Left, Right Justified or DSP
    * 16/20/24/32 bit Word Lengths
    * Analogue Bypass Path Feature
    * Selectable AUX Input to the Volume Controls
    * 2.7V to 5.5V Analogue, 2.7V to 3.6V Digital Supply Operation