diff --git a/services/mediametrics/StringUtils.cpp b/services/mediametrics/StringUtils.cpp
index 50525bc..d1c7a18 100644
--- a/services/mediametrics/StringUtils.cpp
+++ b/services/mediametrics/StringUtils.cpp
@@ -20,6 +20,8 @@
 
 #include "StringUtils.h"
 
+#include "AudioTypes.h"
+
 namespace android::mediametrics::stringutils {
 
 std::string tokenizer(std::string::const_iterator& it,
@@ -99,4 +101,30 @@
     return replaced;
 }
 
+template <types::AudioEnumCategory CATEGORY>
+std::pair<std::string /* external statsd */, std::string /* internal */>
+parseDevicePairs(const std::string& devicePairs) {
+    std::pair<std::string, std::string> result{};
+    const auto devaddrvec = stringutils::getDeviceAddressPairs(devicePairs);
+    for (const auto& [device, addr] : devaddrvec) { // addr ignored for now.
+        if (!result.second.empty()) {
+            result.second.append("|"); // delimit devices with '|'.
+            result.first.append("|");
+        }
+        result.second.append(device);
+        result.first.append(types::lookup<CATEGORY, std::string>(device));
+    }
+    return result;
+}
+
+std::pair<std::string /* external statsd */, std::string /* internal */>
+parseOutputDevicePairs(const std::string& devicePairs) {
+    return parseDevicePairs<types::OUTPUT_DEVICE>(devicePairs);
+}
+
+std::pair<std::string /* external statsd */, std::string /* internal */>
+parseInputDevicePairs(const std::string& devicePairs) {
+    return parseDevicePairs<types::INPUT_DEVICE>(devicePairs);
+}
+
 } // namespace android::mediametrics::stringutils