Apps with 'Voice pitch visualization' feature
VLC is a free and open source cross-platform multimedia player and framework. Owned by the non-profit organization VideoLAN.
The media player provided pre-installed with all modern Windows versions (7 and higher): Windows Media Player 12 plays more music and video than ever, including Flip Video and...
Scanning with Windows Defender reports that the program comes with Trojan:Win32/Occamy.C. Chrome won't download. Devs claim it's the installer used, but downloading the installer (from Sourceforge) separately comes up clean. More here: https://malwarefixes.com/threats/trojanwin32-occamy-c/
UltraStar Deluxe is a free and open source karaoke game inspired by the Singstar game available on the Playstation.