One Track Orchestra is a freeware sample-based virtual instrument in VST plugin format for Windows-based digital audio workstations. This plugin from Make Some Music Now features a simple user interface with reverb and output volume sliders.
This is not meant to be used live, but if you’re looking for an extremely lightweight tool for adding some orchestral sounds to your projects, One Track Orchestra is the right one for you. It is only currently available in VST host applications on Windows.
Read more about this here: https://bedroomproducersblog.com/2018/01/07/one-track-orchestra-vst/