WB-AMR　　VMR-WB 是新型可变速率多模式宽带语音编解码器，专为无线 CDMA 2000标准而设计，目的在于在 50 至 7000 HZ 的频带上进行语音编码，采样率为 16 KHZ。VMR-WB 基于 3GPP AMR-WB (G722.2) 编解码器，在每秒速率12.65 Kbit 上可实现互操作。 　　VMR-WB 工作模式有四种，具体选择哪种应视网络的流量情况而定。前三种模式专门针对 CDMA 系统，而第四种模式为 AMR-WB 互操作性模式。 　　VMR-WB 与 AMR-WB

基于QT的，windows下的麦克风录音，可以自己设置采样频率-QT-based, windows under the microphone recording, you can set up their own sampling frequency

Output sampling frequency lower than internal decoded sampling frequency.

Initialize resampler when switching internal or external sampling frequency.

The x and y are pre-biased, so implementations may just truncate them. i.e. half the sampling frequency has been added. -The x and y are pre-biased, so implementations may just truncate them. i.e. half the sampling frequency has been added.