It has always been my understanding that the built in apple DLS Synth are Roland sound samples.

On one of my computer midi/audio set ups i use the built in apple DLS Synth and a virtual qwerty keyboard for notation input or play along.


Mac Audiophile 2020 2019 2018 2017 USB plus previous years versions

macOS Mojave - 10.14.6 @ Aug 16, 2019

iMac i3 3.6 GHz 8GB RAM 4K with Retina display

some examples @ sound cloud done with Mac Band and DAW's : https://soundcloud.com/you/tracks