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Just a day left before the deadline. Three entries so far. You still have a chance!

Added xtone too. Because with beeper engines we always have just one less than enough.

Added wtbeep engine, added loop support to Pytha. No real version update, just these two engines and 0.28 WIP build (don't remember if I changed anything important).

I looked into this before. Unfortunately, ArduZ80 is not usable at all. It is incomplete, misses hundreds of opcodes, even some widely used documented ones, does not have any time tracking (very important for beeper uses), and is written in C, so likely not fast enough even in such incomplete form.

Hooking up actual Z80 does not make much sense to the original purpose - a beeper sound card. Z80 emulation on Arduino was considered to make device more accessible, reduce number of components and eliminate need of having EPROM burner. Otherwise you can just design the device with actual Z80, it just adds a few more logic chips (~10 chips total), and you need to program the boot ROM.

Pi-R Squared has interesting sound. It may be the Savage engine (not too sure), considering there is Jas C. Brooke in the credits, but the noise sounds unusual. There is a scroller running along the music, too.

I thought we had one, but I wasn't able to locate, and this one has my post with mention of Galaxy Force and few other interesting old engines. Better to split it to a separate thread anyways.

I was totally sure 3 was Wham. It sounds exactly like Wham, pure square, the carrier hiss, the echo trick at the beginning. Then the drums kick in, typical LS ones. Maybe it is the third version of his engine? Going to investigate.

Edit: more likely that's the first LS engine, or maybe an engine that inspired Lyndon to make his own (music credited for Barry Leitch). Main sound loop looks very similar to Wham, but with some changes in registers usage.

Great stuff, more the merrier, especially with new ideas on tracker internal architectures and UI design.

One bug report so far - when I closed program, Windows error occured, 'the program was stopped, close it?' (not sure how it is in english, I'm on localized Windows).

Default settings for drum is 20 (slide) and 2 (pitch).

On a side note, yeah, there is a little mess with lack of zero value in 1tracker. I didn't thought it could be important when I started the project, now it would be quite difficult to add it, all engine scripts would need a fix to support that. But I'll get to it eventually, as it makes things more obvious (0 to disable something).

Vortex Tracker II actually needs an alternative (there is few already, but not very popular). The reason is that VT2 basically a Pro Tracker 3 (Zx Spectrum's) clone, limited by its original, slightly expanded format. While it is really good for music in general, there were even better formats on ZX (ASC Sound Master, for one), and there is also specific requirements for music in games that needs it to be as compact as possible, but PT3 format isn't much effective in this regard (a song takes 5K easily). There is no need to replace VTII, but providing alternative to handle specific cases would be nice.

Cursor following song while it is playing would be pretty convinient, but unfortunately it is pretty tricky (not impossible) to implement it due to the multi-engine concept itself. Tracker would need to somehow get actual playing position, but that needs to be reported by each engine, and not all engines actually use rows and speed concept internally (some just store delays between events). Another idea is to just move cursor approximately, depending on play time, but this needs very precise speed-to-time translation, which is again very tricky, because beeper engines tend to have major tempo fluctuations. So yes, at the time being we have to live without it.