InterSymmetric – https://www.intersymmetric.xyz/nnnb/room1/

A tool to jam online with beats, etc, although I have not tried it yet.

Heard about on Tom Ravenscroft’s show last night on BBC6

Update: I’ve just tried it. It’s fantastic fun!! Here’s the screen capture of my first session:

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Spectrogram – https://musiclab.chromeexperiments.com/Spectrogram/

This is great – you can upload your own samples with drag + drop. Plus you can play sounds with your mouse.

Discovered today, whilst continuing to search for a feature in the old Audiomaster IV program on the Amiga – the feature could be called, I think, a “3D Sonogram”.

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Apotome & Leimma – the online microtonal Music System

– which you can read about in my post from last year. Plus here is a screen recording of it in action: