Of course this new SongKey provides better accuracy in every aspect: key recognition is faster and more precise, chords are detected more precisely and tempo is more accurate.
We have put great attention improving the “chromagram” a level representation of the intensity of each note playing in the song taking into consideration a wider range of octaves and filtering out some slight out of tune sounds. The data extracted from the audio is used to feed a simple artificial intelligence unit that is used to detect each chord, and SongKey MK4’s chord detection extends to sevenths, fifths and suspended chords.

The new key detection engine builds on the chromagram and expands it with another artificial intelligence unit based around a statistical chord progression model that analysing the chord sequence is able to understand the key of the song, this has the great advantage that the key recognition is always realtime so you can change song without the need to reset the plugin, or if the song changes key in some part of it, the plugin will simply be able to detect the new chord sequence and follow the key change, all of this working just on your DAW, with no need for an internet connection.

The two chromagrams (the one used for chord recognition and the one for key recognition) are shown on the GUI so that you can know which notes are playing and which ones you can use for your track, also we added a handy keyboard display that allows you to see which keys are being played. This is extremely useful if you use SongKey MK4 for acapellas or other samples, with a quick look you can know the key of your samples and which notes to use in your tracks to complement those samples.
Finally we have an accelerated and resizable vector GUI that looks good on any display, even if you double its size.

The new SongKey MK4 also comes as a standalone App for macOS and Windows, this allows you to feed it with any sound from your other apps and see SongKey’s analysis in real-time, you can also use a live recording or a band playing live as its input, since it generates MIDI clock from the detected tempo, it can drive another DAW or sequencer and keep it in time with the live sound.
SongKey is very useful in those situation in which you don’t have an instrument at hand to find out the key of a song you are working on or if you are a DJ and want to make a mash up but you don’t know in which key a song is written. The chord detection feature gives you insights on the chord progression of the song so that you can better design your bass lines and pads.

Features
Artificial Intelligence driven key identification that follow key changes
Realtime audio and MIDI chord detection
Confidence display for each found key
Key and Chord chromagram that shows each note level
Key and Chord piano roll view to see which notes are active
Sample mode for short sounds analysis
Realtime tempo detection
MIDI output of detected chords
Stand alone App for both Mac and Windows
MIDI clock output (in the stand alone App)
Sharp and Flat notation
Resizable vector GUI
Hardware accelerated GUI
Apple M1 support
macOS (10.11 and later) and Windows (7 and later, OpenGL 2.1 required) support.
64-bit only plugins for macOS and Windows.
Audio Units, VST, VST3 and AAX format.

home page: https://www.hornetplugins.com/plugins/hornet-songkey-mk4/

DOWNLOAD HERE