Pro Audio Converter Help Guides and reference for batch audio conversion on macOS
Help topics Version History

Version History

Every release of Pro Audio Converter, from the initial 1.0 launch onward.

Version 1.10.1 — September 11, 2025

  • Fixes an App Store submission issue; no user-visible changes.

Version 1.10 — September 3, 2025

New

  • Native Apple Silicon support.
  • Better handling of multi-channel audio files (5.1, 7.1, etc.) across a wide range of formats.
  • Protected WMA files are now detected up front instead of failing part-way through conversion.

Changes

  • Removed the ability to encode to True Audio (.tta) and Sound Designer II (.sd2) formats. Reading these formats as input is still supported.

Fixes

  • Fixed channel layout issues when decoding certain multi-channel audio files.
  • Fixed memory issues that could occur when encoding MP3 or Speex files.
  • Fixed the progress counter to accurately report the total number of encode operations.
  • Fixed decoding of 8-bit audio files.
  • Fixed encode errors caused by incorrect duration estimates for some input files.
  • Fixed crashes when converting True Audio (.tta) files.
  • Fixed a buffer-sizing issue with Monkey's Audio (.ape) files.
  • Fixed an issue where the encoder settings panel wouldn't always update when switching between output formats.
  • Fixed the right-click menu behavior in the output formats list.
  • Fixed the Select Previous and Select Next commands.
  • Fixed threading issues that could cause instability when processing many files.
  • aLaw/uLaw files are now written as standard WAV files for better compatibility.

Version 1.9.2 — January 14, 2024

  • Added support for reading 11.2896 MHz DSD files.
  • Fixed a rare crash when many input files were skipped because they were already in the destination format.
  • Fixed a slowdown when removing a large batch of files from the queue.
  • Fixed an issue with progress bars showing as indeterminate when they shouldn't be.
  • Fixed handling of invalid accidental counts in MIDI data.

Version 1.9.1 — July 6, 2020

  • Fix an issue with clearing or reverting metadata.

Version 1.9.0 — July 2, 2020

  • Support for Dark Mode.
  • Update WavPack to 5.1.0, adding support for WavPack DSD files.
  • Update LAME to 3.100.
  • Update FLAC to 1.3.3.
  • Update Ogg to 1.3.4.
  • Other minor bug and cosmetic fixes.

Version 1.8.1 — September 23, 2015

  • Update for El Capitan compatibility.

Version 1.8 — June 28, 2015

  • Added support for decoding DSD files.
  • Added the ability to create "uncompressed" FLAC files.
  • Added "source encoded with" as a format specifier.
  • Updated FLAC to 1.3.1.
  • No longer creates a default directory in your Music folder.
  • Many bug fixes.

Version 1.7.5 — June 17, 2014

  • Added a preference to remove unsafe characters for Windows file systems.
  • Fixed an issue when converting a large number of .caf files.
  • Fixed a possible issue with encoding Monkey's Audio files.
  • Fixed an issue with reading .mov files on Mavericks.
  • Other small bug fixes.

Version 1.7.4 — November 26, 2013

  • Fixed an issue that could cause PAC to not launch.

Version 1.7.3 — October 28, 2013

  • Fixed some compatibility issues with 10.9 Mavericks.

Version 1.7.2 — October 9, 2013

  • Fixed a possible bug with creating directories introduced in the previous update.

Version 1.7.1 — October 3, 2013

  • Fixed an issue with writing to folders that have an asterisk in their name.
  • Fixed an issue with writing Track Artist in MP4 files.
  • Fixed an issue with decoding certain .mov files.

Version 1.7 — September 16, 2013

  • Added support for reading and writing Opus files.
  • Added support for reading Mod files.
  • Added the ability to set the comments field to a format string (in the preferences).
  • Added source file information to the list of possible format strings.
  • Added a metadata field for Key.
  • Added a metadata field for ISRC.
  • Metadata information is now read from Apple Loops.
  • Fixed a permissions issue when dragging in from iTunes.
  • Fixed an issue where certain format specifier strings would cause the program to crash.
  • Fixed an issue where your output directory might not get added to the sandbox even after allowing access.
  • Updated FLAC to 1.3.0.
  • Updated FFmpeg to 2.0.1.
  • Updated Monkey's Audio codec to 4.12.

Version 1.6 — June 2, 2013

  • Added the ability to preserve the input file's folder structure.
  • Added the option to write ID3v2.3 tags to MP3 files.
  • Added the ability to add the output directory chooser in the toolbar.
  • Added the ability to drag your output folder directly to the output directory chooser.
  • Added the option to preserve Broadcast WAV chunk.
  • Album artwork data size, dimensions, and image type are now displayed.
  • Added the ability to re-arrange the output formats.
  • Added .3ga input file support.
  • Added a preference for writing "Encoded By" metadata information.
  • Added a preference to open the output directory after encoding.
  • Improved multi-channel audio support.
  • Updated FFmpeg libraries to 1.20.
  • Updated TagLib to version 1.8.
  • Fixed an issue where the program would crash if the format specifiers produced an empty string.
  • Fixed an issue where re-encoding files to the same source location would add unwanted numbers to the file name.
  • Fixed the way FLAC seek tables are created, improving FLAC seeking in certain applications.
  • Fixed some memory leaks.
  • App Store version is now sandboxed per Apple's requirements.

Version 1.5.1 — June 3, 2012

  • Fixed an issue where selecting "Overwrite Existing Output Files" would not actually overwrite existing output files.

Version 1.5 — April 14, 2012

  • Added support for reading and writing True Audio (.tta) files.
  • Added support for writing Ogg Speex files (it could already read them).
  • Added a "Compilation" checkbox to the metadata editor.
  • File list queue now shows progress for each output format.
  • Write Metadata is now its own button that can be added to the toolbar by option-clicking on the toolbar and choosing "Customize Toolbar…".
  • Field focus is now maintained in the metadata editor when changing tracks.
  • Album artwork is now shown when selecting multiple files with identical artwork.
  • Added keyboard shortcuts for Previous, Next, and Close in the metadata editor (⌘P, ⌘N, and ⌘W).
  • A progress sheet is now shown when reading large amounts of metadata.
  • Fixed an issue where lots of icons would bounce on the Dock when decoding WMA Lossless using Flip4Mac.
  • Fixed a MIME type issue with embedded artwork.
  • Fixed an issue with the Speex decoder that would chop some files short.
  • Fixed an issue decoding WMA files with floating-point samples.
  • Progress is now shown when converting Speex files to other formats.
  • You can now write metadata to the source file without needing an output format selected.
  • Added a preference to fall back on the source filename when the Track Title metadata is missing.
  • Added an "Actions" menu with Encode, Write Metadata, and Cancel.
  • Updated TagLib to version 1.7.1.

Version 1.4 — March 13, 2012

  • Added WMA Lossless support for users with Flip4Mac Pro.
  • Added manual control of bit depth and sample rate when encoding FLAC and Monkey's Audio files.
  • Which MP3 tag types to write can now be selected in the preferences (ID3v1, ID3v2.4, or APE Tag).
  • Added option to skip encodings where the source and destination types are the same.
  • Made the comments field of the metadata editor multi-line.
  • Added "Auto" to AIFF and WAV bit depths.
  • "Use Custom Naming Scheme" preference now shows an example of how the naming scheme will look.
  • Added a preference to display the error log as soon as an error occurs, instead of waiting until the end.
  • Added the ability to show the error log in the Window menu.
  • VBR quality now shows a numerical value, and you can fine-tune it by option-clicking in the slider area.
  • Fixed an issue with decoding non-16-bit Monkey's Audio files.
  • Fixed a possible crashing issue when adding files to your iTunes library.

Version 1.3.1 — February 10, 2012

  • Fixed an issue with reading album artwork from FLAC files.

Version 1.3 — February 1, 2012

  • Added support for reading WavPack files.
  • Added support for reading Musepack files.
  • Added support for reading Ogg Speex files.
  • Updated LAME to 3.99.4.
  • Updated FFmpeg libraries to 0.10.
  • Now writes additional bitrate information to AAC files, mimicking iTunes.
  • Added the ability to re-read metadata from the original source file.
  • Added the option to disable metadata writing.
  • Added BPM and Grouping to format specifiers.
  • Added confirmation for Clear All Metadata.
  • Pro Audio Converter will no longer overwrite files created in the same batch, regardless of user preferences.
  • Fixed a permissions issue — output files now have permissions 0644.
  • Now checks for blank filenames created by format specifiers and replaces them with the source filename.
  • Fixed an issue where the format specifiers would not work for the album artwork file search.
  • Fixed an issue where having a period in the filename section of format specifiers would clear everything after the period.
  • Fixed an issue where renaming files when updating metadata only might not retain the original file extension.
  • Fixed a bug where the Year format specifier might not work.
  • Fixed an issue where pressing ⌘I might not work.
  • Fixed placement of the Cancel button when resizing the metadata editor window.

Version 1.2 — November 27, 2011

  • Now supports reading and writing Monkey's Audio files.
  • Added option for saving album artwork to a file.
  • Added option to automatically import album artwork from a file.
  • Now reads and writes Ogg Vorbis and Ogg FLAC album artwork metadata.
  • Added ability to change the bit depth of Apple Lossless files.
  • Added right-click menus.
  • Now indicates when there are duplicate output formats enabled.
  • Performance enhancements.

Version 1.1 — October 24, 2011

  • Added Bitrate and Sample Rate to the format specifiers.
  • Fixed an issue with copyright metadata not transferring to encoded files.
  • Fixed a possible bug with the comments field of AIF files ripped in iTunes.
  • Fixed a possible bug when encoding VBR MP3 files.
  • Better handling of CBR and ABR Ogg Vorbis encodings.
  • Updated FFmpeg libraries to 0.8.5.
  • Other minor bug fixes.
  • Minor user interface fixes and changes.

Version 1.0 — August 26, 2011

  • Initial release.