I'm delighted to announce new releases (made last Friday) of Sonic Visualiser and two related desktop applications from the Centre for Digital Music at Queen Mary, University of London: Version 4.0 of Sonic Visualiser, a free, cross-platform, open source application for viewing and analysing the contents of music audio files, is now available. The main change in this release, and the reason for the major-version bump to 4.0, is the addition of a "boxes" layer used to annotate and export time-frequency regions. (Refer to https://www.sonicvisualiser.org/doc/reference/4.0/en/#boxes for a description of the boxes layer.) See the home page at http://sonicvisualiser.org for more information and downloads. Version 2.1 of Tony, a free, cross-platform, open source application for high quality pitch and note transcription from solo vocal recordings, is now available. This is what you might call a "consolidation release" - it is almost unchanged from 2.0 in terms of features, but it is updated to fix some compatibility issues that have arisen since 2.0 came out and to prepare the codebase for a future feature release. See the home page at https://www.sonicvisualiser.org/tony/ for more information and downloads. Version 1.0 of Sonic Lineup, a free, cross-platform, open source application for comparative simultaneous visualisation of multiple audio files containing versions of the same source material, is now available. See the home page at https://www.sonicvisualiser.org/sonic-lineup/ for more information and downloads. Chris