ios lame 转换 变声

转化变声，时长不对，因为转换的配置设置的不对。

let recordSettings: [String: Any] = [
            AVFormatIDKey: kAudioFormatLinearPCM,
            AVEncoderAudioQualityKey: 2,
            AVNumberOfChannelsKey: 2,
            AVSampleRateKey: 8000.0,
            AVLinearPCMBitDepthKey: 16
        ]


lame_t lame = lame_init();
            lame_set_in_samplerate(lame, 8000.0);
            lame_set_num_channels(lame, 2);//通道
            lame_set_quality(lame, 2);//质量
            //lame_set_VBR(lame, vbr_default);
            lame_set_brate(lame, 16);
            lame_set_mode(lame, 3);
            lame_init_params(lame);