Thanks Lionel, I very much appreciate your hard work!

Aww, thanks you guys, and thanks @DJ Omnimaga or whoever it was for posting this on the front page! That's a great motivation to keep going with this "nonsense"

In theory it would be trivial to port this to 89/89T. The frequencies in the converter will probably have to be adjusted, but otherwise it might very well run out of the box.
I'm attaching a test build (run with "digiplay()"), give it a try if you like.

Been abusing my TI-92 Plus to make some Heavy Metal. Check it out, yo: https://soundcloud.com/irrlicht-project/the-aftermath-ti-92-plus

This is powered by my latest creation, the QED68 sound routine. QED68 mixes four channels of PCM WAV samples in realtime, at around 24 KHz. It can output 24 discrete volume levels with optional overdrive. The above tune is perhaps not ideal for showcasing the routine's power, as I downsampled quite heavily because I was afraid I would run out of RAM (which ultimately turned out not to be the case at all). Better sound quality is very much possible with better samples.

I guess there aren't many TI-92 Plus users around here, but just in case, here's a package with an XM converter that you can use to make your own music using QED68. Last but not least, here's the source code.

In theory, the code will also work on TI-89 and V200. I haven't tested this however, because I don't have these models and emulators generally won't do the trick (so yeah, it's real HW only). If someone could test it on these calcs, that'd be great.

Excuse my ignorance, but aside from the builtin calc connectivity, what exactly are the benefits of this over just using an Arduino with some shields?

The original BASIC used on the C64 is, err... not one of the strong points of the machine, due to a rather inefficient implementation. Commodore improved it on later machines (C128, Plus 4 series), but on the C64 it is very sluggish. That said, you can do almost anything on it since it allows you to POKE in machine code, then call it with the SYS command.

Hear, hear, a new tilem2! Pleased to hear that (though generally I'm quite happy with the current version).

Btw regarding sound emulation, I found that there are also significant differences in sound between models. For example the 82 Parcus runs much slower, appearantly not even close to the 6 MHz it's supposed to run at according to spec. Also the 83 and up generally run slightly faster than the (regular) 82, but the clock in those models seems to be less accurate, leading to extra fuzz in the sound.

@aeTIos Try C64 Studio if you're on Windows. Otherwise, use cc65 with some shell scripts

Yeah, Xenon music rulez! Beyond the Ice Palace is nice, too, though that was a conversion from C64 iirc.

Also, Kjell Nordbø, yes. One of the greatest SID composers of all times imo. I have to thank you again for bringing his music to my attention. His brings tears to my eyes.

Never had much luck with Wabbit myself, I always get skippy audio. So I stick with tilem2. However, other people have reported that it works fine, so I guess it depends how much horsepower your PC has.

bump... a little video that explains some of the new features in further detail:

Quote from: DJ Omnimaga on February 22, 2016, 02:07:11 AM
@utz might recognize a few of those old computers or the music style on them:

Damn right I recognize these My favourite OST from the Ys series is the original Ancient Ys though, specifically the OPN/PC-88/98 version.

Quote from: Travis on February 21, 2016, 12:34:24 AM
Trackpoints were once common in a lot of laptops. Sadly, these days they almost all seem to be touchpads. I don't understand why. I hate them! I'm pretty sure they slow me down a lot more with their consistently rubbish accuracy and glitchiness than switching my desktop mouse/trackball back to lefthanded use would.

Ahhh thanks heaven, I'm not the only one. I actually even prefer trackpoints over a regular mouse. They're more accurate, don't glitch out because the laser hit some piece of surface it can't handle, and you never have to reposition them either. Well, nothing's worse than a smartphone touchscreen though.

I'm afraid buying a MEGA65 would set you back quite a few bucks, too It's an awesome project, but it'll have it's price.

Songs from 2.00 won't work out-of-the-box in 2.10. I've got a little PC tool in the works for converting/upgrading savestates, though.

In theory, 6 MHz is enough to do some simple gfx along with music. I mean, even in HT2 you can edit stuff while the music is running (with some delays during keypresses though). It's just that the HT2 player is not very useful in that regard, because it happily uses all the registers and a lot of RAM. There are also some synthesis methods that demand much less CPU time, which would be better suited for in-game music.

Good news everyone, version 2.10 is here! Features a more powerful sound routine, several new effects, better keyhandling, and of course various bugfixes. For full details, check the original post in this thread.

download HT v2.10
new demo tune