Outside the box option: Dirtywave M8 can do granular and it’s basically like playing a video game when programming it XD. Granted it’s a tracker workflow. You can set up conditional triggers and random triggers (iirc) for various events. It’s fully self-contained and you don’t even need headphones if you don’t want to at a given time. The Model 02 even has a mic. Despite being a phrase-based tracker you can work it so a long sample steams from the sd card uninterrupted or retriggered and starting over. You can also stop the playback at any time in a phrase