Update AudioQnA README to add a couple usage details (#948)

Signed-off-by: Dina Suehiro Jones <dina.s.jones@intel.com>
Co-authored-by: Sihan Chen <39623753+Spycsh@users.noreply.github.com>

AudioQnA/docker_compose/intel/cpu/xeon/README.md

@@ -127,6 +127,10 @@ curl http://${host_ip}:3002/v1/audio/speech \
 
 ## 🚀 Test MegaService
 
+Test the AudioQnA megaservice by recording a .wav file, encoding the file into the base64 format, and then sending the
+base64 string to the megaservice endpoint. The megaservice will return a spoken response as a base64 string. To listen
+to the response, decode the base64 string and save it as a .wav file.
+
 ```bash
 curl http://${host_ip}:3008/v1/audioqna \
   -X POST \

AudioQnA/docker_compose/intel/hpu/gaudi/README.md

@@ -79,6 +79,8 @@ export LLM_SERVICE_PORT=3007
 
 ## 🚀 Start the MegaService
 
+> **_NOTE:_** Users will need at least three Gaudi cards for AudioQnA.
+
 ```bash
 cd GenAIExamples/AudioQnA/docker_compose/intel/hpu/gaudi/
 docker compose up -d
@@ -127,9 +129,13 @@ curl http://${host_ip}:3002/v1/audio/speech \
 
 ## 🚀 Test MegaService
 
+Test the AudioQnA megaservice by recording a .wav file, encoding the file into the base64 format, and then sending the
+base64 string to the megaservice endpoint. The megaservice will return a spoken response as a base64 string. To listen
+to the response, decode the base64 string and save it as a .wav file.
+
 ```bash
 curl http://${host_ip}:3008/v1/audioqna \
   -X POST \
   -d '{"audio": "UklGRigAAABXQVZFZm10IBIAAAABAAEARKwAAIhYAQACABAAAABkYXRhAgAAAAEA", "max_tokens":64}' \
-  -H 'Content-Type: application/json'
+  -H 'Content-Type: application/json' | sed 's/^"//;s/"$//' | base64 -d > output.wav
 ```