Features apply to all versions (Audiophile, Tonmeister, Home, Demo) unless otherwise stated
Note: from version 4, this app' is only available in Audiophile version and is available through Apple's App Store.
Version 4.0.2 - July 2025 - Release
Allow write access to user-defined destination folders (which is granted by sandboxing when the folder is user-selected) to persist between sessions. The Music folder already has sandboxing entitlements, so this fix applies to other folders.
When 'Same as source file' is selected, show an error at conversion time if the folder is not within the Music folder. Unfortunately sandboxing prevents write access to folders without sandboxing entitlements unless the folder is user-selected, which is not appropriate for the 'Same as source file' option.
Added 'Release Notes / Roadmap' to the Help menu which links to the appropriate Pspatial Audio web page.
Version 4.0 - June 2025 - Release
Analyse the picture metadata in FLAC files and store it as a Chunk_Picture
Include mS in file durations
Added 'Phonograph EQ T (CX Decode)' enhancement to the historic equalisation group
Remove the 'Beyond Shuffling' mode and move 'FRANCINSTIEN T-Sym' inside the 'Stereo Shuffling' mode
Create Aria 4.0 surround for CD-4 decode whenever RADAR is not detected
Remove Hi-Res from Digital Recovery mode. It is available instead from Preferences > Settings
Improve error message when a CD-4 job is not using a source file at 96kHz
Added 'Write audio metrics from conversions into sidecar files' option to Preferences > General > Audio Metrics
Extend the information shown in audio metrics and format it as markdown. Include errors, warnings, conversion parameters and active preferences and clip information
Add support for input 32-bit float files (WAV, AIFF, AIFF-C)
Add 'Pass-through unexpected data chunks' option to Preferences > General
Add helptips to items in the modes list
Added 'Subscription' button to main window which invokes the subscription window via StoreKit 2
Change MAXOSX_DEPLOYMENT_TARGET from 10.15 to 14.6, which is required for StoreKit 2 and standard dialogs
Updated libFLAC.a and its include files to v1.5.0
Replaced Preferences > Features table with a text document
Added Hardware tab to Preferences. This has a description of some hardware options available from PHÆDRUS AUDIO along with links to their web page
Show subscription status in the main window, About dialog and About Preferences
Store the first-run date/time persistently in the Keychain
Rebuilt application and libFLAC.a for both arm64 and x86_64 since Intel hardware from 2018+ supports macOS 14
Added 'Listening Room' to the Help menu which opens https://pspatialaudio.com/listening_room.htm
Added 'Pspatial Audio' and 'Listening Room' buttons to Preferences > About and About dialog
Version 4.0.0 - Test release (Audiophile)
Migrate backend processing from Objective-C to Swift
Re-factor set of common filter functions for reuse by different enhancements
Build filter lists for jobs dynamically, allocating memory for each step and then freeing it when done
Use temporary files to store audio data between each filter step to reduce memory footprint
Changed filter_type to use enum instead of bitwise mask (future-proofing)
Changed format of FRAN chunk (version 3) to support filter_type as enum. Version 1 and 2 FRAN chunks are still read and understood.
Analyse the picture metadata in FLAC files and store it as a Chunk_Picture
'Copy Audio Metrics to Clipboard' stores audio metrics as JSON instead of plain text
Improve process percentage logic to be presented per filter. Some enhancements show several filters each with a unique description.
Use https for all www.pspatialaudio.com links
Updated copyright dates to 2023
Added 'SWIFT_COMPILATION_MODE = wholemodule' for increased performance in release mode - reduces conversion time by appox 13%
Include mS in file durations
Update _expiryDate for Demo to 2024-06-06
Version 3.2.3 (Date: 2024-06-15) - ENGINEERING RELEASE (Demo only)
Ensure that 'Bass Compensation' checkbox in CD-4 preferences is honoured for CD-4 enhancements. Previously the 'Bass Compensation' checkbox in the Phono EQ preferences was being used for CD-4 enhancements
Changed MACOSX_DEPLOYMENT_TARGET to 10.13 (from 10.12)
Removed FLAC input and output options from Demo version to allow Apple Silicon builds without libFLAC
Changed Demo expiry date to 2025-06-05
Version 3.2.2 (Date: 2023-06-04) - ENGINEERING RELEASE (ALL VERSIONS)
Improve accuracy of R128 loudness range calculation
Fixed Aria 2.0 enhancement attenuation factor
Update copyright year to 2023
Update _expiryDate for Demo to 2024-06-05
Version 3.2.1 (Date: 2022-12-04) - ENGINEERING RELEASE (ALL VERSIONS)
Fixed bug in pop-click removal algorithm for the difference track
Added 'Wind-up from 25 to 33.3 RPM' into the 'Capture Speed' options for Phono EQ
Update _expiryDate for Demo to 2023-12-05
Version 3.2.0 (Date: 2022-11-19) - ENGINEERING RELEASE (ALL VERSIONS)
Set error_invalid_compression_type when the WAV type is unsupported. (For example, IEEE floating point.)
Added 'Mach ONE' noise reduction as stand-alone filter
Added 'Mach ONE' noise reduction as an option for Phono EQ and CD-4, available from preferences
Prevent 'CD-4 Quadraphonic Subcarrier Processing' from sticking at 20% if there is no RADAR for CD-4
Update _expiryDate for Demo to 2023-11-11
Version 3.1.22 (Date: 2022-10-16) ENGINEERING RELEASE (ALL VERSIONS)
Save ID3, BEXT and IXML chunks when analysing WAV and AIFF/C files so that this information can be included in audio metrics before the file is processed
Free buffer for calculating R128 Maximum True Peak (LUFS) as early as possible
Fix buffer overrun error when processing quad-rate files
Update _expiryDate for Demo to 2023-10-17
Version 3.1.21 (Date: 2022-03-16) ENGINEERING RELEASE (ALL VERSIONS)
Upgraded OS to 11.6.4 (from 11.2.3), and Xcode to 13.2.1 (from 12.5.1)
Format dates for FRAN chunks as 'YYYY-MM-DD HH:mm:ss +ZZZZ' whatever the system date format is (12-hour or 24-hour)
Update _expiryDate for Demo to 2023-03-17
Version 3.1.19 - ENGINEERING RELEASE (ALL VERSIONS)
Added 'Tape equalisation correction' (Audiophile, and Demo versions)
Upgraded to Xcode 12.4 and Big Sur 11.0.1
Added installer package notarization
Version 3.1.18 - ENGINEERING RELEASE (ALL VERSIONS)
Upgraded to Xcode 12.0 and Catalina 10.15.6
Version 3.1.16 - ENGINEERING RELEASE (ALL VERSIONS)
Added 'Cat 22 (Dolby A) Noise Reduction' - (Audiophile, Tonmeister and Demo versions)
Added 'Disc Echo Removal' (Audiophile, and Demo versions)
Update to Xcode 11.3 (from 10.3) giving support for Catalina 10.15.2
Version 3.1.15 - ENGINEERING RELEASE (ALL VERSIONS)
Added 'Phonograph EQ P3 (Virtual MM RIAA preamp)' - (Audiophile, Phonograph and Demo versions)
Fixed bug with destination folder not always following the source folder when files from different locations are processed together
Version 3.1.14 - ENGINEERING RELEASE (ALL VERSIONS)
Upgrade to Xcode 10.2.1
Added 'Matrix H Quadraphonic' processing
Version 3.1.13 - ENGINEERING RELEASE (ALL VERSIONS)
Added 'High-Quality CD-4 Quadraphonic' processing
Version 3.1.12 - ENGINEERING RELEASE (ALL VERSIONS)
Wind-Up processing added (33.3RPM to 78/68/89 RPM speeds)
Enable wind-up options in the 'Capture Speed' popup
Calculate new file duration (shown on GUI) for wind-up options, including when Demo restrictions apply
Version 3.1.11 - ENGINEERING RELEASE (ALL VERSIONS)
Ensure that quad rate sample speeds are writen into file headers for AIFF/AIFF-C formats
Version 3.1.10 - ENGINEERING RELEASE (ALL VERSIONS)
Use system colours in table view which work in both 'Light Appearance' and 'Dark Appearance'. (The ‘Completed’ black text was almost impossible to read when ‘Dark Appearance’ was selected in System Preferences > General > Appearance...)
Version 3.1.9 ENGINEERING RELEASE (ALL VERSIONS - not Demo)
Features added:
Enable 'CD De-emphasis' for Phonograph, Tonmeister, and Home versions
(Engineering only) Fix progress refresh issue with Xcode 10.1.
Version 3.1.8
Features added:
Added 'JVC CD-4 Quadraphonic’ as an enhancement option within the 'Quadraphonic Decode' group
Added Phono EQ Preferences with the following options...
Phonograph Regime
Half Speed Needle Drop - (NEW)
Gain Ranging
Cartridge Channel Balance - (NEW)
Pop-Click Removal
Crackle Removal - (NEW)
LP Distortion Cancellation, with stylus radius selection - (NEW)
Needle Scratch Removal
Pspatial Rumble Filter
Hum Removal, with optional Bass Compensation - (NEW)
Improvement to Needle-Scratch Removal option in Phono EQ Preferences
Added Hi-Res options to Settings Preferences tab
Version 1.3
Adds Pop-Click Filter option for Phonograph Equalisations, selected via 'Preferences > Settings'
Adds stand-alone Pop-Click Filter - (Audiophile, Tonmeister)
Fixes application crash when analysing EBU R128 loudness metrics for long audio files - (Audiophile, Tonmeister)
Enables Dither option for Home version
Changes OS X deployment target to 10.10 - (OS X Yosemite was released on October 16, 2014, as a free update through the Mac App Store worldwide)
Fixes problems with slider controls on Mac OS 10.10.4
Version 1.2
Added support for quad-rates (176.4kHz/192kHz) in Audiophile, Tonmeister and Demo versions
Version 1.1
Enabled support for 24-bit files in Home version.
Added downward dynamic-range expansion for needle-drop recordings with Groove Sleuth preamplifier.
Version 1.0
Initial release of Stereo Sauce
Roadmap - planned enhancements in future versions*
Loading the Center channel in a CD-4 decode with signal from a virtual front-facing cardioid - Planned for Ver. 4.n
ID3v2 tag editing - Ver. 4.n
Support for Apple Lossles files - Ver. 4 or beyond
B-format input for Ambisonics decode - Ver. 4.n or beyond
New recording characteristics - Ver. 3.n and beyond
Support standard cartridges in cartridge-compensation - Ver. 4 or beyond
Dolby C decoding - Ver. 4.n
Decode CD-4 to Ambisonics B-format - Ver. 4.n
* Future Looking Statements: This page includes predictions, estimates or other information that might be considered forward-looking. While these forward-looking statements represent our current judgment on what the future holds, they are subject to risks and uncertainties that could cause actual results to differ materially. Please keep in mind that we are not obligating ourselves to revise or publicly release the results of any revision to these forward-looking statements in light of new information or future events.
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Apple Certified Developer. Stereo Lab, Aria 51, Aria 20, Head Space, Groove Sleuth, iLOOP and FRANCINSTIEN T-Sym are trademarks of Pspatial Audio. FRANCINSTIEN and Bride of FRANCINSTIEN (BoF) are trademarks of Phaedrus Audio. Macintosh and the Mac logo are trademarks of Apple Computer, Inc.