Foobar2000:Version 2.1 Preview Change Log

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(newest first)


  • Final release.
  • Fixed wrong reported length of certain RF64 WAV files.
  • Fixed obscure shutdown crash.


  • Fixed incorrect handling of certain rare Monkey's Audio configurations.
  • Converter: Fixed bad encoding of AIFF 8-bit (unsigned instead of signed).
  • Fixed missing decode postprocessor (DTS/HDCD etc) for TAK.


  • Fixed internet radio search failing to play stations where referenced M3U playlist links multiple alternate streams.
  • Internet radio search accessibility fixes.
  • Ignore malformed radio stream title returned by specific streams.
  • Fixed various table views no longer recognizing keyboard shortcuts (F2 etc) since the introduction of dark mode support.
  • Added an option to toggle additional decoding (DTS, HDCD, etc) during playback, so you can play DTS-WAV without decoding DTS.
  • Made possible to play plain MP4 (not DASH) files from HTTP servers that don't report content-length.


  • Added support for tagging Wave64 & RF64 formats.
  • Report LC-AAC codec long name as just "AAC".
  • Last HE-AAC fix fixed Apple/FDK but broke Nero AAC gapless. This has now been corrected.
  • Fullscreen size of visualisations is no longer stored as last window size (was 2.0 regression);
  • Made possible to play Vorbis muxed into MP4.


  • Fixed playlist layout infinite update loop with column auto sizing and album art.
  • Fixed missing HE-AAC delay compensation, breaking gapless playback of HE-AAC.
  • Monkey's Audio updated to 10.28.
  • Internal performance optimizations.


  • Made possible to read & write itunesalbumid & itunesartistid tags in M4A/MP4.
  • Implemented reading of multiplexed Ogg files.
  • Fixed bad handling of undefined-length chunks in WAV files.
  • Fixed stack overflow with specific archive files in indexed music folders.
  • Made MP3 VBRI delay reported and skipped correctly. Note that VBRI files are still not gapless.
  • Bitcompare: "dBTP" renamed to "dBFS", as there's no true peak math involved.
  • Monkey's Audio updated to 10.27.
  • ReFacets sorting behavior updated again.
  • Internet Radio keyboard accessibility fixes.
  • Fixed bad handling of preferences page creation errors (wrong message, broken dark mode).


  • Fixed bad behavior when rewinding MP4 DASH files.
  • Fixed HTTP redirect handling regression which broke some radio stations.
  • Converter: Changed FDK AAC link to rarewares.
  • Updated exclusive output channel remapping logic again.


  • Fixed PCM-in-MP4 decoding error regression.
  • Fixed specific cases of HTTP redirects being incorrectly handled.
  • Fixed missing "encoding" info field for AC3.
  • Fixed inverted sort indicators in Internet Radio Search.
  • Additional debug logging for specific app-fails-to-start issue.


  • Fixed an embarrassing RAR regression that caused content of RAR archives to be extracted to the current directory while reading, failing to read archive if not possible to extract.
  • ReFacets sorting changed to match playlist & album list sorting.
  • ReFacets fixed unwanted scrolling on focus change.
  • Fixed incorrect handling of HTTP redirects with spaces in path.
  • Made not flash main window if started with /hide switch.
  • WASAPI exclusive channel mask negotiation logic update - 5.1-side could be preferred over 7.1, causing unwanted channel remapping.


  • Updated RAR unpacker code to the latest RAR library version.


  • Improved behavior if multiple components have the same name. In recent 2.1 builds, neither would get loaded, leading in some cases to completely non-working foobar2000 install.
  • Fixed DTS codec info for DTS in Matroska.
  • Fixed bug in Media Library preventing previously-unplayable files from being reindexed after installation of new decoders.


  • ReFacets accessibility issues fixed.
  • Rewrote external album art lookup code, wildcard lookup now works where it didn't before.


  • Improved corrupted profile recovery (radio bookmarks database).
  • Changed how DSP settings are applied when playing through a high-latency output such as UPnP.
  • Updated Monkey's Audio to 10.23.
  • Fixed missing component version info in crash reports.
  • Renamed "Notification Area" to "System Tray" everywhere.
  • Fixed dragging of WebP images to Properties dialog artwork tab.


  • Playlist search regression fix, return key wasn't handled.
  • Made possible to read ReplayGain info from Musepack APE tags (normally it's supposed to be in Musepack headers).
  • Improved recovery from corrupted configuration files.
  • Less forced info reloading on played tracks.


  • Various performance optimizations.
  • Suppressed unnecessary playlist rewrite on autoplaylist startup.


  • ReFacets filtering performance improved.
  • Installer update.
  • Made possible to decode float16 & float24 WAVs again.


  • Stability fixes.
  • Fixed media library memory leak regression from a month ago.


  • Fixed wrong zlib DLL bundled, causing 32-bit version to crash.


  • Fixed loss of autoplaylist content order when upgrading from v1.x.
  • Made autoplaylist sort logic work more consistently with v1.x, that is, sort by just date/album/etc implicitly applies default sort criteria to date/album/etc groups.
  • Made search query GREATER/LESS/EQUAL treat numbers as floating-point rather than integer.
  • Updated zlib to v1.3.


  • Added built-in Converter profile for TAK.
  • Made TAK MD5 checksums read without TAK decoder component, allowing audio integrity verification.


  • Fixed a race condition bug sometimes causing a slight delay before now playing track info appears.


  • FTP client now forces IPv4 (we don't currently implement IPv6 specific extensions).
  • Made possible to sort & reorder radio bookmarks.
  • Improved behavior of programmatically opening advanced preferences branches.
  • Fixed radio search regression, radio-browser link works again.
  • Converter cosmetic fixes.


  • Fixed a very old bug with bad behavior of null output during audio buffer underrun.
  • Added "station details" in radio search.
  • WebDAV sources can now be accessed via webdav-http:// or webdav-https:// URLs.
  • Converter: Added support for encoding Monkey's Audio through MAC.exe
  • Converter: Various cosmetic fixes.
  • Fixed a very old typo in titleformat_help.html $meta_sep() example.
  • Improved recovery from corrupted configuration files.
  • Fixed seekbar & volume bar flickering in Default UI.


  • Bumped radiobrowser allowed JSON size, 4MB in last build wasn't good enough for all radio stations returned for some criteria.
  • Removed WebDAV folder listing support. It was causing endless bugs in HTTP reader (no obvious way to tell if WebDAV is supported on some URL or not). Will be restored along with ability to add WebDAV folders to library, and restricted to known WebDAV locations.
  • Crash log writer added timestamps to recent events.


  • Internet Radio tech & frontend updates.
  • Another HTTP connection reuse regression fix.


  • Turned Internet Radio dialog into UI Element / Columns UI Panel. Moved from File menu to View.
  • Implemented radio-browser integration with Internet Radio panel.
  • HTTP connection reuse regression fix.


  • Fixed use-after-free bug in HTTP error handling.


  • HLS amended, ID3 in MP4 DASH work.
  • Album List vs tabs focus cycling fix.
  • Forcefully suppressed Dark Mode if High Contrast is active.


  • HLS radio fixes, segmented MP4 DASH now plays.
  • Networking improvements, better read-ahead buffering performance.


  • Lots of FTP issues fixed. Encrypted FTP now works properly.
  • Applied dark mode to tooltips.
  • Disabled MS xHE-AAC decoder for now. MS AAC decoder appears to use Dynamic Range Correction with no apparent way to turn it off, breaking ReplayGain etc.


  • Fixed last build regression causing audio glitching with WASAPI Exclusive in specific scenarios.
  • Updated Monkey's Audio to 10.16.
  • Internet radio regression fixes.
  • Made "Internet Radio" dialog pick HLS streams.
  • Restored old behavior of Converter with .bat files, using full paths to start.


  • Fixed a bug that caused current track restart in certain scenarios, such as rapidly changing playback settings.
  • Fixed a bug causing audio glitching near the end of last song with WASAPI Exclusive.
  • Added standard %codec_long% field to properly display detailed names of all codecs.
  • Improved reporting of AAC & DTS codec/profile info.
  • Added decoding of xHE-AAC via Media Foundation on Windows 11.
  • Fix for "DTS 96/24", made bit depth reported as 24-bit.


  • Archive reader fixes: Added archive_v4, fb2k::fsItem interop with archives, fixed missing shortname/filename+ext retrieval methods on standard archive reader.
  • Rewritten HLS reader, removed lots of hacks, made remote read-ahead setting used properly.
  • Improved HTTP connection reuse, similar to recent FTP optimizations.
  • Rewritten full file buffer feature, no longer blocks until whole file has been read. Large FLAC files for an example should now open with no delay.
  • Fixed glitchy focus behavior with Default UI tabs container.


  • Added dsp_entry_v4, made possible for DSPs to know their context (playback, conversion, etc).
  • More aggressive HLS segment prebuffering.


  • Fixed FLAC decoder regression, no more falsely reported truncation after seeking.
  • Fixed FTP compatibility regression, modland FTP works again.
  • Fixed WS_VISIBLE bugs in Columns UI adapter (caused console warnings in some scenarios).
  • Fixed some rendering glitches with big primary font selected.


  • Added 32-bit build for 32-bit people.
  • Fixed non-working extraction of .RSN (renamed .RAR).
  • ReFacets layout fixes.
  • FLAC decoder: log premature EOF, mark partially encoded files as bad even if they don't appear corrupted otherwise.
  • Fixed first run dialog text truncation at 175% text size.


  • Public beta versions are now called "preview" and have dates instead of numbers.
  • Preview builds for Windows will be x64 only for now. Other CPU archs will be included when nearing a stable release.
  • Worked around specific internet radio server serving malformed Ogg FLAC headers.
  • Worked around specific internet radio server serving HLS segments with wrong both extension and content type.
  • Dark mode refinements, fixed inplace edit boxes in various controls.
  • Fixed screen reader accessibility issues in Preferences / Context Menu and Preferences / Advanced.
  • Made possible to list WebDAV folders added via 'Add Location'.
  • HTTP client efficiency tweaks. If using HTTPS to access a password-protected resource, password is sent preemptively - old versions would send it only in response to server asking for it.
  • libopus v1.4
  • Made libFLAC and libopus versions shown in components list.
  • Improved FTP playback & listing, fewer connections used.
  • Made FLAC seektable tool also rewrite oversized seektables.
  • Fixes to startup "new UI detected" dialog, obeys system dark mode as foobar2000 UI isn't running yet.
  • Default UI: Fixed toolbar font getting reverted to system default in response to certain events, such as system theme change.
  • Default UI: Fixed media library & playlist search edit boxes being too small if a large font is selected.
  • Added startup console message if profile folder appears to be on a spinning hard drive.
  • Made file format registration check on startup asynchronous, faster and less buggy this way.
  • Properties: Fixed misbehavior of "Clear ReplayGain information" if the dialog was opened for just one track.