YOIVNN Upright Bass Library is a realistic upright bass instrument built specifically for Serum 2’s Multisample engine. It’s designed to give you a natural, expressive low end that feels played, not programmed. The tone stays consistent across the keyboard, responds smoothly to velocity, and sits easily in genres like jazz, neo-soul, RnB, lo-fi, hip-hop, and film scoring.

The library is a true multisample instrument with natural dynamics, clean key mapping, and velocity-responsive playback, making it playable and musical across the full range without heavy processing or artificial stretching.

How to Load the Library

If you are using one of the included Serum presets, load the preset first. Once the preset is loaded, go to OSC A → Multisample, click Browse, and select the SFZ file “Upright Bass Serum Library II” so the preset links correctly to the multisample.

If you just want to use the library as a standalone multisampling instrument, open Serum, go to OSC A or OSC B, switch the oscillator type to Multisample, click Browse, select the SFZ file, and you are done.