If you haven't started using Studio One, and you're eager to check it out, you can register for and download Studio One Prime and get more information about this entry-level yet surprisingly full-featured version. It is also possible to start the 30-day Studio One Professional demo at any point and then return to running Studio One Prime once the demo expires.

Version 3.1 Release Notes
New features and improvements:
• Support for PreSonus Studio 192 USB 3.0 Audio Interface and DIGIMAX DP88
• Preamp control
• DSP Fat Channel control with native link option
• New Plugin Manager added to the Browser
• “Favorites” folder with user-definable favorites
• “Recent” folder shows 10 most recent plugins / instruments
• show/hide option for plugins
• customizable plug-in folder structure
• Added volume control to parallel effects paths in channel editor
• [Windows] Added support for Marian ASIO hardware sample format
• Added Control Link focus mapping for external instruments
• Added option to show mixer channel numbers in track controls section
• Added button to open Note FX from track controls
• Added option to colorize track controls
• [OSX] improved 10.11 compatibility
• Keep notes in loop range on input quantize
• Audio effect editor is closed when plugin is removed in mixer insert
• Improved Windows 10 and High-DPI compatibility
• Improved Auto Gain in Compressor and Channel Strip with further improved gain
response in Limiter and Tricomp [NOTE: this may affect levels in pre-3.1 songs]
• Improved mouse-over visibility of monitor enable buttons in mixer

Improved multi-touch control:
• crash when renaming channel / changing color with touch
• panning area should not select tracks
• prevent channel selection while touching faders
• lag when moving faders with touch
• prevent scrolling while editing controls inside scroll-view
• touching the scrolling arrangement should stop scrolling immediately
• jitter in scroll animation in browser after releasing touch
• long-press menu on inserts / sends in device rack does not work with touch
• selecting a channel with touch + command key immediately selects it
• button swipe shows unexpected mouse-over behavior
• ignore additional fingers during zooming
• touch scrolling performance issue
• multi-touch support for Multiband Dynamics plug-in
• resizing mix window with touch is slower than with mouse
• Updated Sound Set Builder 3 now available via PreSonus Exchange

The following issues have been fixed:
• DDP export fails on second attempt
• Channels can disappear in detached Mixer on resize
• [OSX] Keyboard modifier not working on drag event
• [OSX] Crash with touch input
• [OSX] Redraw issue with Waves Plugins
• Metronome "On" State for outputs not saved
• [Win 10] Open files dialog not shrinkable
• Midi event erased after next looped recording
• [Win] Crash with Pen input
• Remote surface placement broken
• Multi-Instrument with multiple tracks can not be transformed
• Stem export does not export instrument track correctly
• Open Marker track key command not working
• VST3 GUI resize issue with FabFilter Pro-C 2
• Track automation "flyback" on touch behavior
• [Win] Sample rate change not possible with ZOOM ASIO driver
• [Win] Manual not opening when user account name has special characters
• Crash on unloading Roland Promars