tballison commented on code in PR #492:
URL: https://github.com/apache/tika/pull/492#discussion_r1771521627


##########
tika-core/src/main/resources/org/apache/tika/parser/external/tika-external-parsers.xml:
##########
@@ -61,4 +61,57 @@
        <match>\s*([A-Za-z0-9/ \(\)]+\S{1})\s+:\s+([A-Za-z0-9\(\)\[\] 
\:\-\.]+)\s*</match>
      </metadata>
   </parser>
+  <parser>
+     <check>
+       <command>sox --version</command>
+       <error-codes>126,127</error-codes>
+     </check>
+     <command>env FOO=${OUTPUT} sox --info ${INPUT}</command>

Review Comment:
   The `${OUTPUT}` token tricks the ExternalParser to setting 
`outputFromStdOut` to false and thereby loads the stream into metadata items 
(`extractMetadata`) rather than writing contents to the xhtml stream 
(`extractOutput`).



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