diff --git a/audio/cheetah/config/mixer_paths.xml b/audio/cheetah/config/mixer_paths.xml
index b268f0f..7cccf52 100644
--- a/audio/cheetah/config/mixer_paths.xml
+++ b/audio/cheetah/config/mixer_paths.xml
@@ -105,6 +105,12 @@
     <ctl name="ASP TX4 Source" value="Zero" />
     <ctl name="R ASP TX4 Source" value="Zero" />
 
+    <!-- Cirrus fast switch init -->
+    <ctl name="Fast Use Case Switch Enable" value="0" />
+    <ctl name="Fast Use Case Delta File" value="fast_switch5.txt" />
+    <ctl name="R Fast Use Case Switch Enable" value="0" />
+    <ctl name="R Fast Use Case Delta File" value="fast_switch5.txt" />
+
     <!-- default EP volume -->
     <ctl name="PCM Playback Switch" value="1"/>
     <ctl name="PCM Playback Volume" value="10"/>
@@ -635,6 +641,14 @@
         <ctl name="R Main AMP Enable Switch" value="1"/>
     </path>
 
+    <path name="speaker-post">
+        <!-- load Bypass FIR -->
+        <ctl name="Fast Use Case Delta File" value="fast_switch3.txt" />
+        <ctl name="Fast Use Case Switch Enable" value="1" />
+        <ctl name="R Fast Use Case Delta File" value="fast_switch4.txt" />
+        <ctl name="R Fast Use Case Switch Enable" value="1" />
+    </path>
+
     <path name="voice-speaker">
         <ctl name="R Boost Peak Current Limit" value="3.50A"/>
         <ctl name="Boost Peak Current Limit" value="3.50A"/>
@@ -643,12 +657,21 @@
     <!--<ctl name="R DSP RX2 Source" value="ASPRX2"/>-->
         <ctl name="R Main AMP Enable Switch" value="1"/>
         <ctl name="Main AMP Enable Switch" value="1"/>
-        <ctl name="R AMP PCM Gain" value="17"/>
-        <ctl name="AMP PCM Gain" value="17"/>
+    </path>
+
+    <path name="voice-speaker-post">
+        <!-- load Enable FIR -->
+        <ctl name="Fast Use Case Delta File" value="fast_switch1.txt" />
+        <ctl name="Fast Use Case Switch Enable" value="1" />
+        <ctl name="R Fast Use Case Delta File" value="fast_switch2.txt" />
+        <ctl name="R Fast Use Case Switch Enable" value="1" />
+        <ctl name="Digital PCM Volume" value="800"/>
     </path>
 
     <path name="voice-dual-speaker">
-        <path name="speaker" />
+        <!-- Speaker Separation -->
+        <path name="voice-speaker" />
+        <path name="voice-speaker-post" />
     </path>
 
     <path name="speaker-safe">
@@ -656,6 +679,12 @@
         <ctl name="R Main AMP Enable Switch" value="1"/>
     </path>
 
+    <path name="speaker-safe-post">
+        <!-- load Bypass FIR -->
+        <ctl name="R Fast Use Case Delta File" value="fast_switch4.txt" />
+        <ctl name="R Fast Use Case Switch Enable" value="1" />
+    </path>
+
     <path name="usb-tty-full">
     </path>
 
diff --git a/audio/cheetah/cs35l41/fw/fast_switch1.txt b/audio/cheetah/cs35l41/fw/fast_switch1.txt
new file mode 100644
index 0000000..00d4d29
--- /dev/null
+++ b/audio/cheetah/cs35l41/fw/fast_switch1.txt
@@ -0,0 +1 @@
+11,4,768,1236,222608,131072,2167332,1,7,0,629947780
\ No newline at end of file
diff --git a/audio/cheetah/cs35l41/fw/fast_switch2.txt b/audio/cheetah/cs35l41/fw/fast_switch2.txt
new file mode 100644
index 0000000..1d7bd81
--- /dev/null
+++ b/audio/cheetah/cs35l41/fw/fast_switch2.txt
@@ -0,0 +1 @@
+11,4,768,1236,222608,135168,2167332,1,7,0,919471758
\ No newline at end of file
diff --git a/audio/cheetah/cs35l41/fw/fast_switch3.txt b/audio/cheetah/cs35l41/fw/fast_switch3.txt
new file mode 100644
index 0000000..671662e
--- /dev/null
+++ b/audio/cheetah/cs35l41/fw/fast_switch3.txt
@@ -0,0 +1 @@
+11,4,768,1236,222608,131328,2167332,1,7,4194304,35123929
\ No newline at end of file
diff --git a/audio/cheetah/cs35l41/fw/fast_switch4.txt b/audio/cheetah/cs35l41/fw/fast_switch4.txt
new file mode 100644
index 0000000..61d8dca
--- /dev/null
+++ b/audio/cheetah/cs35l41/fw/fast_switch4.txt
@@ -0,0 +1 @@
+11,4,768,1236,222608,135424,2167332,1,7,4194304,290834899
\ No newline at end of file
diff --git a/audio/panther/config/mixer_paths.xml b/audio/panther/config/mixer_paths.xml
index b268f0f..7cccf52 100644
--- a/audio/panther/config/mixer_paths.xml
+++ b/audio/panther/config/mixer_paths.xml
@@ -105,6 +105,12 @@
     <ctl name="ASP TX4 Source" value="Zero" />
     <ctl name="R ASP TX4 Source" value="Zero" />
 
+    <!-- Cirrus fast switch init -->
+    <ctl name="Fast Use Case Switch Enable" value="0" />
+    <ctl name="Fast Use Case Delta File" value="fast_switch5.txt" />
+    <ctl name="R Fast Use Case Switch Enable" value="0" />
+    <ctl name="R Fast Use Case Delta File" value="fast_switch5.txt" />
+
     <!-- default EP volume -->
     <ctl name="PCM Playback Switch" value="1"/>
     <ctl name="PCM Playback Volume" value="10"/>
@@ -635,6 +641,14 @@
         <ctl name="R Main AMP Enable Switch" value="1"/>
     </path>
 
+    <path name="speaker-post">
+        <!-- load Bypass FIR -->
+        <ctl name="Fast Use Case Delta File" value="fast_switch3.txt" />
+        <ctl name="Fast Use Case Switch Enable" value="1" />
+        <ctl name="R Fast Use Case Delta File" value="fast_switch4.txt" />
+        <ctl name="R Fast Use Case Switch Enable" value="1" />
+    </path>
+
     <path name="voice-speaker">
         <ctl name="R Boost Peak Current Limit" value="3.50A"/>
         <ctl name="Boost Peak Current Limit" value="3.50A"/>
@@ -643,12 +657,21 @@
     <!--<ctl name="R DSP RX2 Source" value="ASPRX2"/>-->
         <ctl name="R Main AMP Enable Switch" value="1"/>
         <ctl name="Main AMP Enable Switch" value="1"/>
-        <ctl name="R AMP PCM Gain" value="17"/>
-        <ctl name="AMP PCM Gain" value="17"/>
+    </path>
+
+    <path name="voice-speaker-post">
+        <!-- load Enable FIR -->
+        <ctl name="Fast Use Case Delta File" value="fast_switch1.txt" />
+        <ctl name="Fast Use Case Switch Enable" value="1" />
+        <ctl name="R Fast Use Case Delta File" value="fast_switch2.txt" />
+        <ctl name="R Fast Use Case Switch Enable" value="1" />
+        <ctl name="Digital PCM Volume" value="800"/>
     </path>
 
     <path name="voice-dual-speaker">
-        <path name="speaker" />
+        <!-- Speaker Separation -->
+        <path name="voice-speaker" />
+        <path name="voice-speaker-post" />
     </path>
 
     <path name="speaker-safe">
@@ -656,6 +679,12 @@
         <ctl name="R Main AMP Enable Switch" value="1"/>
     </path>
 
+    <path name="speaker-safe-post">
+        <!-- load Bypass FIR -->
+        <ctl name="R Fast Use Case Delta File" value="fast_switch4.txt" />
+        <ctl name="R Fast Use Case Switch Enable" value="1" />
+    </path>
+
     <path name="usb-tty-full">
     </path>
 
diff --git a/audio/panther/cs35l41/fw/fast_switch1.txt b/audio/panther/cs35l41/fw/fast_switch1.txt
new file mode 100644
index 0000000..d6a7551
--- /dev/null
+++ b/audio/panther/cs35l41/fw/fast_switch1.txt
@@ -0,0 +1 @@
+11,4,768,1236,157072,131072,2167332,1,7,0,849631556
\ No newline at end of file
diff --git a/audio/panther/cs35l41/fw/fast_switch2.txt b/audio/panther/cs35l41/fw/fast_switch2.txt
new file mode 100644
index 0000000..9ebe3be
--- /dev/null
+++ b/audio/panther/cs35l41/fw/fast_switch2.txt
@@ -0,0 +1 @@
+11,4,768,1236,157072,135168,2167332,1,7,0,568746574
\ No newline at end of file
diff --git a/audio/panther/cs35l41/fw/fast_switch3.txt b/audio/panther/cs35l41/fw/fast_switch3.txt
new file mode 100644
index 0000000..97006ef
--- /dev/null
+++ b/audio/panther/cs35l41/fw/fast_switch3.txt
@@ -0,0 +1 @@
+11,4,768,1236,157072,131328,2167332,1,7,4194304,356488729
\ No newline at end of file
diff --git a/audio/panther/cs35l41/fw/fast_switch4.txt b/audio/panther/cs35l41/fw/fast_switch4.txt
new file mode 100644
index 0000000..2bbc374
--- /dev/null
+++ b/audio/panther/cs35l41/fw/fast_switch4.txt
@@ -0,0 +1 @@
+11,4,768,1236,157072,135424,2167332,1,7,4194304,108899603
\ No newline at end of file