@paipaupao Sorry you only have two port options the analog headphone or the digital USB-C/Thunderbolt ports.
I work with some pro's and students which use mac's for composing, editing and creating music as well as foley and electronic music artists which need the full deep fidelity for production work. All use USB DAC units in their MacBook Pro's.
One Pro I know uses all four USB-C ports! He uses a Hub to act as a pass through for a few DAC's (3 per hub) Behringer Audio Interaces While Behringer units are USB-A based they really don't need the full ability of USB-C on his 2019 16" MacBook Pro. This is what he uses for his output Fiio K3. His work is small 1 to 3 minutes for TV & radio ads. Anything longer tends to push the system hard and rendering can really push the system too hard.
A few use the new 2019 Mac Pro's in the studio for massive creating and mixing their work. Maybe you need to look at a desktop class system. Neil Parfitt - Using a Mac Pro in the Studio for a music creator!
If you are a budget you don't need the pro gear! Just look at what Billy Eilish and her brother Finneas used to create their music! Billie Eilish proved anyone can access Grammy-winning gear