Convert SHN to FLAC

Before you start

SHN is an older lossless format used mainly for live concert recordings. FLAC is a more widely supported lossless format, so converting SHN to FLAC lets you keep the audio quality while making the files easier to use in modern players and editors. Conversion normally happens locally with a desktop audio tool, not through an online service, because SHN support is uncommon in browser-based converters.

Confirm that the SHN files are complete and that any associated metadata files, such as text or checksum files, are in the same folder. Keep a copy of the original SHN files until you have checked the FLAC output. Also install a converter that supports both SHN and FLAC; tools such as FFmpeg, foobar2000 or Traders Little Helper can be used without payment, but support for SHN varies by version and available components.

Step-by-step instructions

One reliable option is FFmpeg with a build or configuration that includes the Shorten decoder. Open a terminal or command prompt in the folder containing the SHN files, then run:

ffmpeg -i input.shn -compression_level 8 output.flac

The compression level controls only file size, not audio quality. If you want the output to match the original sample rate and bit depth, do not add resampling or dithering options unless the player requires them.

To convert several files in one pass on Windows, use a loop in Command Prompt:

for %f in (*.shn) do ffmpeg -i "%f" "%~nf.flac"

On macOS or Linux, use a shell loop:

for f in *.shn; do ffmpeg -i "$f" "${f%.shn}.flac"; done

If FFmpeg reports that it cannot find a Shorten decoder, use a graphical tool with bundled SHN support instead. In foobar2000, add the SHN input component if it is not included, load the files into a playlist, select them, choose Convert, and set the output format to FLAC. In Traders Little Helper, select the decode or format conversion task, add the SHN files, choose FLAC output and run the job.

Check the target folder and naming settings before starting the conversion. Keep the conversion reversible by retaining the original SHN files and any accompanying checksum information until the output has passed inspection.

Check the output

Confirm that each source file produced one FLAC file and that the track list is unchanged. Open one or two FLAC files in a media player and listen to the beginning, middle and end where practical. In a player or file properties dialog, verify that the sample rate and bit depth are the expected values and match the source recording.

A longer quality check can be done with FFmpeg, but first confirm that your installed build supports or rejects the comparison options reliably:

ffmpeg -i input.shn -f md5 -
ffmpeg -i output.flac -f md5 -

If both commands produce hashes, matching hashes mean the decoded audio data is identical. FLAC is lossless, so a correct conversion should not change the decoded audio. The main limitation is that SHN metadata may not be carried into FLAC automatically; check whether tags or text metadata need to be re-added after conversion.

Common problems and next steps

If the converter cannot open the SHN file, the file may be incomplete. Look for an associated checksum or file list from the recording source and verify the file against it before converting. If FFmpeg says the Shorten decoder is unavailable, use a version or package that includes Shorten support, or switch to a tool with built-in SHN support.

If the FLAC file plays at the wrong speed or has playback noise, the source may have a non-CD sample rate or unusual channel layout. Inspect the source file properties first and avoid forcing a sample rate during conversion. If metadata is missing, add it after conversion with a tag editor rather than editing the SHN source.

If you need a simpler batch workflow, a graphical tool may be easier than command-line loops. Before deleting the SHN originals, verify the complete FLAC set and preserve any source checksum or text files used by the recording project.