https://brianwithanh.tumblr.com/post/148993139396/another-1k-followers-hey-look-at-that-another
https://geektyrant.com/news/brian-h-kim-talks-about-composing-scores-for-tv-and-film
Courtesy of a few interviews from blogs including Geekytyrant and Beyond the Cartoons, as well as his own Tumblr blog, you can see he writes the music in Cubase while using a Mac Pro to a 2 desktop setup. The keyboard you see is a Roland A88 keyboard which is used as a MIDI controller in order for the music to be created while recording in Cubase. If you look real closely, he also has an iPad running TouchOSC which works as another wireless setup controlling any type of instrument track effects such as making the strings louder or quieter.
In a interview which got deleted, Kim also says he has an additional PC with tons of RAM and many virtual instrument libraries.
https://www.instagram.com/p/lY4Q6Wzal5/
From Instagram, this is one of Brian's early Cubase templates while composing additional music for a sitcom called "How I Met Your Mother". If you notice, you can see one of his instruments is outputted into a program called Vienna Ensemble Pro. The way it works since Brian is using two computers and he uses MIDI Via Lan, which connect the computers together through a device, when he plays a virtual instrument onto the keyboard, it all triggers back to Cubase. It works since some of the synths/samples are on his PC alongside his Mac Pro.
And here is a stitched together image of Brian's recent Cubase template from 2018 from a posted video of him how he scored a scene from a Season 3 SVTFOE episode.
It is very huge consisting of over 500 instrument/MIDI tracks. Of course, most composer use Kontakt by Native Instruments as an instrument interface. For Kim's setup, the Kontakt instruments are also hosted in Vienna Ensemble Pro featuring instruments from 8Dio, Spitfire, Native Instruments, Audiobro, Imperfect Samples, Sonicouture, Spectrasonics, and ProjectSAM. Also plugins from Universal Audio and drums from iZotope, Fxpansion, and That Sound Drums. A lot of instruments and sounds means tons of variety and range of genres for the composer to create.
For composers working in TV, they organize different instrument groups in stems or buses, different tracks which are sent while post-production is happening. There are also a couple of reverb and effects tracks to which are routed into the stems. It does sound complicated, but the final result sounds amazing.
Besides virtual instruments, Brian H. Kim also has a couple of audio tracks used for vocals, guitars, and basses all performed live.
Overall, there is a lot that goes into making music for film and television and Brian H. Kim is just one of them with his own unique setup.