Also the Home Studio does not contain the TTS-1 according to the comparison charts.

If you are just looking to get a better GM sound source and are just starting out in MIDI I would suggest you get a free SoundFont player:

http://hiphopmakers.com/over-2000-free-soundfonts-free-soundfont-player

http://www.best-free-vst.com/plugins/virtual-instruments/soundfont-sf2-player-01.php

and some free GM patches:

http://www.ntonyx.com/sf_f.htm

http://www.synthfont.com/links_to_soundfonts.html

or some paid ones:

https://www.gmsoundfont.com/

The nice thing about soundfonts (SF2s) is that you can mix and match them. For example you could have an all orchestra SF2, or jazz band SF2 etc.

Note that SF2s are a dated technology but they are the perfect place for someone to start in MIDI. Some of the GM SF2s that I have heard rival the TTS-1 sounds. YMMV.

Whenever I get something stuck in the back of my throat, I dislodge it by drinking a beer.
It's called the Heineken Maneuver.

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware