diff --git a/audio/felix/config/audio_platform_configuration.xml b/audio/felix/config/audio_platform_configuration.xml
index ad98c49..cf9f7b4 100644
--- a/audio/felix/config/audio_platform_configuration.xml
+++ b/audio/felix/config/audio_platform_configuration.xml
@@ -188,7 +188,7 @@
         <!-- dev1: audio dev2: haptic -->
         <usecase id="UC_HAPTIC_AUDIO" dev1="2" dev2="7" period="10" period_num="4"/>
         <!-- for VOIP output, 4 * 10ms buffer -->
-        <usecase id="UC_VOIP_PLAYBACK" dev1="16" dyn_path="true" dsp_vol="true" mmap="false" period="10" period_num="4"/>
+        <usecase id="UC_VOIP_PLAYBACK" dev1="16" dyn_path="true" dsp_vol="true" mmap="false" period="10" period_num="4" pcm_ch="2"/>
         <!-- for input -->
         <usecase id="UC_AUDIO_RECORD" dev1="8" dyn_path="true" dsp_vol="false" mmap="false" period="20" period_num="4"/>
         <usecase id="UC_HOSTLESS_UL" dev1="15"/>