This is the software written by us at Seijinohki Soft. The software is called DigiBand. This is version RC2 Playing God Knows, it's a pretty old video at this point, but people still like it.

Before you post ANYTHING:
I made DigiBand.
Velex wrote the base library for the sound initialization and buffering.
Songs can be found at GDAMania but most need to be modified to work.
I used SDL for video initialization.
DigiBand was designed to originally be an arcade game as well as a PC game.
This is why it had an option for coin insertion.
We were working on a prototype cabinet, but were discouraged after the, "In the groove" incident.
It didn't become popular, because people were already stuck in their ways, and because of GDAMania.
GDAMania promoted DTXMania.
GDAMania is the first place people end up looking to for songs and software.
DigiBands purpose was to take out unnecessary features that only made the quality of sim files worse (Like SET.DEF) or were just confusing or unnecessary to an average user.
In the end I was trying to conform the Sim community to a simpler layout and format, they argued Set.def files were important, but no one used them in a way that made sense.
The title screen was confusing to users even though the instructions were clear. It was to make it easier for more than one instrument to play without having to configure it in the options.
DigiBand used themes; however, no one made themes because of lack of popularity.
Most people do not realize Skin and Theme mean the same thing.
DigiBand was an open source project, some people submitted a patch or two, but they never worked or were stable.
In the end DigiBand never receive the attention it needed to become a better product and is what you see currently at the main website.
I can't post the URL here, so go google it.
This video is of an OLD version.
The current version is 1.0.2, this version is 0.9.8 I believe.
There were plans for DigiBand EX which would dynamically support and convert sim files for various numbers of drums and frets (see the svn build) but that was canceled do to lack of interest. (Mostly due to the lack of my interest)
In the end DigiBand supported DTX and GDA files it's own way, which in most cases was more accurately than DTXMania.
DigiBand had more accurate audio playback and timing, which made DTX / GDA files play slightly off.
These were written to work with DTXMania which had huge amounts of latency when using MP3 audio (It didn't prebuffer anything.)
DTXMania in the end looked like an application meant for windows 95, unless you skinned it, but then the quality still felt grainy and unpolished.
DigiBand was trying to use newer rendering technologies to improve the quality of graphics, you could tune these down in the settings.ini file to make it run smoother on your machine.
DigiBand (800x600 or customizable) ran at a higher resolution than DTXMania (640x480)
DigiBand uses OpenGL where DTXMania uses Windows MFC.
DigiBand is in english and meant to be, unlike DTXMania. (less info)