Something

            <encode>
                <quality>-1</quality>
                <!-- <samplerate>27127</samplerate> -->
                <samplerate>22000</samplerate>
                <channels>1</channels>
            </encode>

            <!-- stereo->mono downmixing, enabled by setting this to 1 -->
            <downmix>1</downmix>

            <!-- resampling.

                Set to the frequency (in Hz) you wish to resample to, -->

            <resample>
                <in-rate>44000</in-rate>
                <out-rate>22000</out-rate>
            </resample>
        </instance>
        </stream>
</ices>