diff --git a/.idea/workspace.xml b/.idea/workspace.xml
deleted file mode 100644
index b224b0d..0000000
--- a/.idea/workspace.xml
+++ /dev/null
@@ -1,273 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="BranchesTreeState">
-    <expand>
-      <path>
-        <item name="ROOT" type="e8cecc67:BranchNodeDescriptor" />
-        <item name="LOCAL_ROOT" type="e8cecc67:BranchNodeDescriptor" />
-      </path>
-      <path>
-        <item name="ROOT" type="e8cecc67:BranchNodeDescriptor" />
-        <item name="REMOTE_ROOT" type="e8cecc67:BranchNodeDescriptor" />
-      </path>
-      <path>
-        <item name="ROOT" type="e8cecc67:BranchNodeDescriptor" />
-        <item name="REMOTE_ROOT" type="e8cecc67:BranchNodeDescriptor" />
-        <item name="GROUP_NODE:origin" type="e8cecc67:BranchNodeDescriptor" />
-      </path>
-    </expand>
-    <select />
-  </component>
-  <component name="ChangeListManager">
-    <list default="true" id="f581197a-f26b-4fde-b746-e72c0ed1bb2a" name="Default Changelist" comment="my py dot ini">
-      <change beforePath="$PROJECT_DIR$/.idea/bcao.iml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/bcao.iml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/.idea/misc.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/misc.xml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/bcao/__main__.py" beforeDir="false" afterPath="$PROJECT_DIR$/bcao/__main__.py" afterDir="false" />
-    </list>
-    <option name="SHOW_DIALOG" value="false" />
-    <option name="HIGHLIGHT_CONFLICTS" value="true" />
-    <option name="HIGHLIGHT_NON_ACTIVE_CHANGELIST" value="false" />
-    <option name="LAST_RESOLUTION" value="IGNORE" />
-  </component>
-  <component name="FileTemplateManagerImpl">
-    <option name="RECENT_TEMPLATES">
-      <list>
-        <option value="Python Script" />
-      </list>
-    </option>
-  </component>
-  <component name="FlaskConsoleOptions" custom-start-script="import sys&#10;sys.path.extend([WORKING_DIR_AND_PYTHON_PATHS])&#10;from flask.cli import ScriptInfo&#10;locals().update(ScriptInfo(create_app=None).load_app().make_shell_context())&#10;print(&quot;Python %s on %s\nApp: %s [%s]\nInstance: %s&quot; % (sys.version, sys.platform, app.import_name, app.env, app.instance_path))">
-    <envs>
-      <env key="FLASK_APP" value="app" />
-    </envs>
-    <option name="myCustomStartScript" value="import sys&#10;sys.path.extend([WORKING_DIR_AND_PYTHON_PATHS])&#10;from flask.cli import ScriptInfo&#10;locals().update(ScriptInfo(create_app=None).load_app().make_shell_context())&#10;print(&quot;Python %s on %s\nApp: %s [%s]\nInstance: %s&quot; % (sys.version, sys.platform, app.import_name, app.env, app.instance_path))" />
-    <option name="myEnvs">
-      <map>
-        <entry key="FLASK_APP" value="app" />
-      </map>
-    </option>
-  </component>
-  <component name="Git.Settings">
-    <option name="RECENT_GIT_ROOT_PATH" value="$PROJECT_DIR$" />
-    <option name="RESET_MODE" value="HARD" />
-  </component>
-  <component name="GitSEFilterConfiguration">
-    <file-type-list>
-      <filtered-out-file-type name="LOCAL_BRANCH" />
-      <filtered-out-file-type name="REMOTE_BRANCH" />
-      <filtered-out-file-type name="TAG" />
-      <filtered-out-file-type name="COMMIT_BY_MESSAGE" />
-    </file-type-list>
-  </component>
-  <component name="JupyterTrust" id="c9c24a84-69f9-4c1e-bffb-78383de38689" />
-  <component name="MarkdownSettingsMigration">
-    <option name="stateVersion" value="1" />
-  </component>
-  <component name="ProjectId" id="1iwv1rbtMpCLK7D695td98N37pr" />
-  <component name="ProjectLevelVcsManager" settingsEditedManually="true">
-    <ConfirmationsSetting value="2" id="Add" />
-  </component>
-  <component name="ProjectViewState">
-    <option name="hideEmptyMiddlePackages" value="true" />
-    <option name="showLibraryContents" value="true" />
-  </component>
-  <component name="PropertiesComponent"><![CDATA[{
-  "keyToString": {
-    "RunOnceActivity.OpenProjectViewOnStart": "true",
-    "RunOnceActivity.ShowReadmeOnStart": "true",
-    "WebServerToolWindowFactoryState": "false",
-    "node.js.detected.package.eslint": "true",
-    "node.js.detected.package.tslint": "true",
-    "node.js.selected.package.eslint": "(autodetect)",
-    "node.js.selected.package.tslint": "(autodetect)",
-    "nodejs_package_manager_path": "npm",
-    "settings.editor.selected.configurable": "editor.preferences.fonts.default",
-    "vue.rearranger.settings.migration": "true"
-  }
-}]]></component>
-  <component name="PyConsoleOptionsProvider">
-    <option name="myPythonConsoleState">
-      <console-settings module-name="bcao" is-module-sdk="true">
-        <option name="myUseModuleSdk" value="true" />
-        <option name="myModuleName" value="bcao" />
-      </console-settings>
-    </option>
-  </component>
-  <component name="RecentsManager">
-    <key name="MoveFile.RECENT_KEYS">
-      <recent name="$PROJECT_DIR$/test" />
-      <recent name="$PROJECT_DIR$/bcao" />
-    </key>
-  </component>
-  <component name="RunManager" selected="Python.bcao (io)">
-    <configuration default="true" type="PythonConfigurationType" factoryName="Python">
-      <module name="bcao" />
-      <option name="INTERPRETER_OPTIONS" value="" />
-      <option name="PARENT_ENVS" value="true" />
-      <envs>
-        <env name="PYTHONUNBUFFERED" value="1" />
-      </envs>
-      <option name="SDK_HOME" value="" />
-      <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$" />
-      <option name="IS_MODULE_SDK" value="true" />
-      <option name="ADD_CONTENT_ROOTS" value="true" />
-      <option name="ADD_SOURCE_ROOTS" value="true" />
-      <EXTENSION ID="PythonCoverageRunConfigurationExtension" runner="coverage.py" />
-      <option name="SCRIPT_NAME" value="" />
-      <option name="PARAMETERS" value="" />
-      <option name="SHOW_COMMAND_LINE" value="false" />
-      <option name="EMULATE_TERMINAL" value="false" />
-      <option name="MODULE_MODE" value="false" />
-      <option name="REDIRECT_INPUT" value="false" />
-      <option name="INPUT_FILE" value="" />
-      <method v="2" />
-    </configuration>
-  </component>
-  <component name="SpellCheckerSettings" RuntimeDictionaries="0" Folders="0" CustomDictionaries="0" DefaultDictionary="application-level" UseSingleDictionary="true" transferred="true" />
-  <component name="TaskManager">
-    <task active="true" id="Default" summary="Default task">
-      <changelist id="f581197a-f26b-4fde-b746-e72c0ed1bb2a" name="Default Changelist" comment="" />
-      <created>1602831263913</created>
-      <option name="number" value="Default" />
-      <option name="presentableId" value="Default" />
-      <updated>1602831263913</updated>
-      <workItem from="1602831267794" duration="18279000" />
-      <workItem from="1602850978698" duration="7902000" />
-      <workItem from="1602908398925" duration="34104000" />
-      <workItem from="1603714609431" duration="5637000" />
-      <workItem from="1603720261881" duration="8249000" />
-      <workItem from="1605688147310" duration="310000" />
-      <workItem from="1610959328356" duration="12198000" />
-      <workItem from="1611400156203" duration="37000" />
-      <workItem from="1612352074930" duration="3000" />
-      <workItem from="1618788042149" duration="206000" />
-      <workItem from="1618788269888" duration="5049000" />
-      <workItem from="1619508843397" duration="16000" />
-      <workItem from="1620488550972" duration="1067000" />
-      <workItem from="1679187531461" duration="18000" />
-      <workItem from="1679187557538" duration="367000" />
-    </task>
-    <task id="LOCAL-00001" summary="mp3 support! more helpful interface! better code! yahoo!!">
-      <created>1602927759343</created>
-      <option name="number" value="00001" />
-      <option name="presentableId" value="LOCAL-00001" />
-      <option name="project" value="LOCAL" />
-      <updated>1602927759343</updated>
-    </task>
-    <task id="LOCAL-00002" summary="fairly major restructuring that should make future format support a lot easier, support for songs with partially or fully incomplete metadata">
-      <created>1602942890966</created>
-      <option name="number" value="00002" />
-      <option name="presentableId" value="LOCAL-00002" />
-      <option name="project" value="LOCAL" />
-      <updated>1602942890966</updated>
-    </task>
-    <task id="LOCAL-00003" summary="mypy integration">
-      <created>1603715728224</created>
-      <option name="number" value="00003" />
-      <option name="presentableId" value="LOCAL-00003" />
-      <option name="project" value="LOCAL" />
-      <updated>1603715728224</updated>
-    </task>
-    <task id="LOCAL-00004" summary="put everything in main(), zero mypy issues">
-      <created>1603716061845</created>
-      <option name="number" value="00004" />
-      <option name="presentableId" value="LOCAL-00004" />
-      <option name="project" value="LOCAL" />
-      <updated>1603716061845</updated>
-    </task>
-    <task id="LOCAL-00005" summary="code cleanup">
-      <created>1603716273616</created>
-      <option name="number" value="00005" />
-      <option name="presentableId" value="LOCAL-00005" />
-      <option name="project" value="LOCAL" />
-      <updated>1603716273616</updated>
-    </task>
-    <task id="LOCAL-00006" summary="mypy strict support!">
-      <created>1603717518466</created>
-      <option name="number" value="00006" />
-      <option name="presentableId" value="LOCAL-00006" />
-      <option name="project" value="LOCAL" />
-      <updated>1603717518466</updated>
-    </task>
-    <task id="LOCAL-00007" summary="wav support!">
-      <created>1603719245013</created>
-      <option name="number" value="00007" />
-      <option name="presentableId" value="LOCAL-00007" />
-      <option name="project" value="LOCAL" />
-      <updated>1603719245013</updated>
-    </task>
-    <task id="LOCAL-00008" summary="my py dot ini">
-      <created>1603719576507</created>
-      <option name="number" value="00008" />
-      <option name="presentableId" value="LOCAL-00008" />
-      <option name="project" value="LOCAL" />
-      <updated>1603719576507</updated>
-    </task>
-    <task id="LOCAL-00009" summary="added project files, aiff support">
-      <created>1603720506558</created>
-      <option name="number" value="00009" />
-      <option name="presentableId" value="LOCAL-00009" />
-      <option name="project" value="LOCAL" />
-      <updated>1603720506558</updated>
-    </task>
-    <task id="LOCAL-00010" summary="turns out i didn't need to do anything to add alac support - they work the same as aac m4a files do. although i did find and fix a bug in the m4a handling so that's good at least 0uo">
-      <created>1603723480563</created>
-      <option name="number" value="00010" />
-      <option name="presentableId" value="LOCAL-00010" />
-      <option name="project" value="LOCAL" />
-      <updated>1603723480563</updated>
-    </task>
-    <task id="LOCAL-00011" summary="remove unneeded file extension">
-      <created>1603814270091</created>
-      <option name="number" value="00011" />
-      <option name="presentableId" value="LOCAL-00011" />
-      <option name="project" value="LOCAL" />
-      <updated>1603814270092</updated>
-    </task>
-    <task id="LOCAL-00012" summary="check against tag format type instead of file extension&#10;&#10;sorta like, &quot;if tag_format == 'id3'&quot; rather than &quot;if song_format == ['mp3', 'wav', 'aiff']&quot;">
-      <created>1603888340561</created>
-      <option name="number" value="00012" />
-      <option name="presentableId" value="LOCAL-00012" />
-      <option name="project" value="LOCAL" />
-      <updated>1603888340561</updated>
-    </task>
-    <option name="localTasksCounter" value="13" />
-    <servers />
-  </component>
-  <component name="TypeScriptGeneratedFilesManager">
-    <option name="version" value="3" />
-  </component>
-  <component name="Vcs.Log.Tabs.Properties">
-    <option name="TAB_STATES">
-      <map>
-        <entry key="MAIN">
-          <value>
-            <State />
-          </value>
-        </entry>
-      </map>
-    </option>
-  </component>
-  <component name="VcsManagerConfiguration">
-    <option name="ADD_EXTERNAL_FILES_SILENTLY" value="true" />
-    <MESSAGE value="mp3 support! more helpful interface! better code! yahoo!!" />
-    <MESSAGE value="fairly major restructuring that should make future format support a lot easier, support for songs with partially or fully incomplete metadata" />
-    <MESSAGE value="mypy integration" />
-    <MESSAGE value="put everything in main(), zero mypy issues" />
-    <MESSAGE value="code cleanup" />
-    <MESSAGE value="mypy strict support!" />
-    <MESSAGE value="wav support!" />
-    <MESSAGE value="my py dot ini" />
-    <MESSAGE value="added project files, aiff support" />
-    <MESSAGE value="turns out i didn't need to do anything to add alac support - they work the same as aac m4a files do. although i did find and fix a bug in the m4a handling so that's good at least 0uo" />
-    <MESSAGE value="remove unneeded file extension" />
-    <MESSAGE value="check against tag format type instead of file extension&#10;&#10;sorta like, &quot;if tag_format == 'id3'&quot; rather than &quot;if song_format == ['mp3', 'wav', 'aiff']&quot;" />
-    <option name="LAST_COMMIT_MESSAGE" value="check against tag format type instead of file extension&#10;&#10;sorta like, &quot;if tag_format == 'id3'&quot; rather than &quot;if song_format == ['mp3', 'wav', 'aiff']&quot;" />
-  </component>
-  <component name="com.intellij.coverage.CoverageDataManagerImpl">
-    <SUITE FILE_PATH="coverage/bcao$mypy.coverage" NAME="mypy Coverage Results" MODIFIED="1610962969226" SOURCE_PROVIDER="com.intellij.coverage.DefaultCoverageFileProvider" RUNNER="coverage.py" COVERAGE_BY_TEST_ENABLED="true" COVERAGE_TRACING_ENABLED="false" WORKING_DIRECTORY="$PROJECT_DIR$" />
-    <SUITE FILE_PATH="coverage/bcao$bcao.coverage" NAME="bcao Coverage Results" MODIFIED="1603719196915" SOURCE_PROVIDER="com.intellij.coverage.DefaultCoverageFileProvider" RUNNER="coverage.py" COVERAGE_BY_TEST_ENABLED="true" COVERAGE_TRACING_ENABLED="false" WORKING_DIRECTORY="$PROJECT_DIR$" />
-    <SUITE FILE_PATH="coverage/bcao$bcao__ceres_.coverage" NAME="bcao (ceres) Coverage Results" MODIFIED="1618790587601" SOURCE_PROVIDER="com.intellij.coverage.DefaultCoverageFileProvider" RUNNER="coverage.py" COVERAGE_BY_TEST_ENABLED="true" COVERAGE_TRACING_ENABLED="false" WORKING_DIRECTORY="$PROJECT_DIR$" />
-  </component>
-</project>
\ No newline at end of file