Update cheatsheets

flac

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# flac
+
+> Encodes, decodes and tests FLAC files.
+> More information: <https://xiph.org/flac>.
+
+- Encode a WAV file to FLAC (this will create a FLAC file in the same location as the WAV file):
+
+`flac {{path/to/file.wav}}`
+
+- Encode a WAV file to FLAC, specifying the output file:
+
+`flac -o {{path/to/output.flac}} {{path/to/file.wav}}`
+
+- Decode a FLAC file to WAV, specifying the output file:
+
+`flac -d -o {{path/to/output.wav}} {{path/to/file.flac}}`
+
+- Test a FLAC file for the correct encoding:
+
+`flac -t {{path/to/file.flac}}`