To understand why the CHD format is highly recommended for Sturmwind , it helps to look at how Dreamcast ROMs have evolved over the years.
Sturmwind presents some unique considerations when it comes to CHD conversion and emulation. The game, like several other independently-released Dreamcast shoot ‘em ups, has certain characteristics that can affect CHD compatibility.
Are you like a black screen or missing audio?
In the early 2000s, CDI was the standard because you could burn games to standard 700MB CDs. However, Sturmwind was designed for the 1GB GD-ROM. CDI rips of Sturmwind are notoriously bad—they down-sample the CD-quality audio (reducing the amazing soundtrack to a tinny mess) and sometimes remove the attract mode videos.
The compressed data is stored in a single file, making it easier to distribute and manage.
Historically the most common format, CDI files were modified to fit the contents of a 1GB proprietary Dreamcast GD-ROM onto a standard 700MB CD-R. To achieve this, audio and video assets were often compressed, downsampled, or stripped out entirely.
I can give you specific instructions to get your game up and running. Share public link
: An Android app that allows you to convert ROMs to CHD directly from your mobile device.