To "live DJ" there's the extremely famous https://virtualdj.com/ To create prerecorded DJ sets https://www.mixmeister.com/ Been using both for at least 10 years, love them both. - Source: Hacker News / 5 months ago

Not open source, but free for "home use" https://virtualdj.com/. - Source: Hacker News / 5 months ago

I started with Virtual DJ to get used to the software latency (I came from turntables) and get my muscle memory on button locations (which is why I stayed with the same brand). VDJ has every feature you need. The software is free to use without a controller from virtualdj.com. Source: almost 2 years ago

A lot of the places that do it from scratch I notice use https://virtualdj.com/. Source: almost 2 years ago

DJ software, like VirtualDJ will have features that are more conducive to what you're trying to do, like live looping functions that help you lock the loop to the beat. It's also cheaper (free for non-commercial use without a hardware controller) than QLab, and it's cross-platform (QLab is Mac-only, if that matters). Source: about 2 years ago

This was the first subtractive snth I got really into. It's so good! Matt Tytel also made an open source wave table synth called vital that I'm also in love with that you can find here: https://vital.audio/ git repo is here: https://github.com/mtytel/vital. - Source: Hacker News / 7 months ago

Don't forget Vital which is Matt's newer synth. It continues to be open-source as well. https://vital.audio/. - Source: Hacker News / 7 months ago

Good stuff! I started getting in to this at the start of the year. Already had an old, dusty MicroKORG and MIDI interface to use it as a controller, but recently splashed out on a bigger controller as the Korg's tiny keys were hurting me - plus, I wanted something bigger to get better at piano! A couple of free soft synths I'd recommend are Surge XT, and Vital. https://surge-synthesizer.github.io/... - Source: Hacker News / 7 months ago

Serge is great, but Vital whips the llama's ass: https://vital.audio/ There was a time when Sylenth and Serum-quality synthesizers didn't exist for free. Back then, shit like Serge and Helm were really the best you could rely on. Maybe a few free U-HE plugins or your DAW defaults. Today's producers are downright spoiled with so many excellent free options! - Source: Hacker News / 8 months ago

Download Vital Synth from https://vital.audio/ and install it. It usually goes into some VST folder. Then point Reaper (under settings/preferences plugins location) to that folder so it can find it. Source: 11 months ago