This is how you add the recording date:

1. Open the CMI template using DaxEdit
2. Select the Declarations tab
3. Search for the following command line:

SHOW_RELEASEDATE["Display release date"] : bool = true;

4. Add the following command on a separate line AFTER SHOW_RELEASEDATE........

SHOW_RECORDINGDATE["Display recording date"]: bool = true;

When done, your code should look like this:
......
SHOW_RELEASEDATE["Display release date"] : bool = true;
SHOW_RECORDINGDATE["Display recording date"]: bool = true;
SHOW_CATEGORY["Display category"]: bool = true;
......

5. Now select the Album Page tab and search for the following
command:

<!--[if($SHOW_CATEGORY)]-->

6. Paste the following text BEFORE the above mentioned command:

<!--[if($SHOW_RECORDINGDATE)]-->
<!--[if(recordingdate)]-->
<tr>
<td width="30%" align="right" nowrap><b>Recording date: </b></td>
<td width="70%" bgcolor="$SHADECOLOR2" class="valshade">