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Thanks, Shiru. I'm not terribly proud of this one, actually. Except for the ghost notes in the section starting at 0:45, really like how those turned out. Think your track is great, too, classic Shiru style. Wanted to send another track, but same problem: not enough time to finish it.

Thanks you guys! After playing with this engine some more I think it needs more polish, but I'm still glad it works at all. And yes, it's surprisingly cheap even with realtime low pass, but of course banked buffers open up even more possibilities, like emulating attack transient variations (StringKS can do it but there are no built-in buffers for it so they currently need to be prepared by the user). I'm also wondering if this could be a candidate for Jan Deak style "ahead-of-time" buffer generation. In general I have a strong feeling that his method might be useful for something other than just generating loads of pulse trains, but still searching...

Yes! Thanks for the reminder, Vinnny. I'll try to make something but can't promise.

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A small note about Huby, using Beepola/1tracker is strictly optional for transcriptions. You can also generate music data directly from the imported MIDI data in OpenMPT by using the Huby XM converter. However, the best option is always to ask a chiptune musician to do a cover for you, rather than converting from MIDI data

Ha, neat!

I think anteater has some flaws (namely incorrect tuning due to insufficient frequency divider size). On the other hand, looking back it was probably not that bad for a first (well, probably second or third) attempt

I don't know what would be the equivalent in SDCC syntax, might be as simple as

oldSP = $+1

Generally, what this pseudo-op construct means is: "assign a label (oldSP) to the current address ($) + 1". So in this example, oldSP will point to the address immediately after the "ld sp,nnnn" instruction, which happens to be the "nnnn" part. There is some other part in the code (usually in the init part) that writes the value of SP at that point in time to the location of oldSP. The snippet "ld sp,old_value" is then usually called on exit, to restore SP to it's proper value, as many beeper engines mess with the stack a lot.

Anyway, the point is that if you don't have any form of "label equ $+x" available, you can also simply locate all points in the code that write to 'label' (in case of the SP backup there'll usually just be one such location). That write op will look something like

  ld (oldSP),sp

which you can change to

  ld (oldSP + 1),sp

and then change the "oldSP equ $+1" to simply "oldSP".

Your music_data should simply contain the pattern pointers, the extra "patterndata" structure is not needed. So

music_data:
   defw pattern1
   defw pattern2
   defw 0
...

The 0-word at the end of the music_data block marks the end of that block, in the same way that the 0-byte at the end of a pattern marks the pattern end.

However, I don't know if Ear Shaver supports this kind of sequence/pattern structure out of the box, perhaps some adjustments to the data loader are needed.

Hmm, would you by any chance be interested in contributing to libmdal? I haven't defined any API for dealing with MDAL modules yet, but in general what I'm looking for is a set of utility functions for algorithmic pattern data generation that users can glue together to form actual generators. Perhaps later wave data as well, but it's not a priority right now. New lib is written in Scheme (specifically Chicken Scheme).

Hmm algorithmic pattern/sample generator, how does that work? Does it write to XM, or directly to .asm? What are the inputs to the algo? I'm asking because I eventually want to support algorithmic data generation natively in the upcoming new libmdal/bintracker, but I'm not not really much into that field myself.

Anyway, nice release Hopefully I'll get around to making something for the label one day but first I gotta finish that thing I promised for Bit Rot ages ago... ducks

He doesn't have any for offer, but there's a good chance he'd build you one on request. https://www.bytedelight.com/?page_id=499
I've bought stuff from the guy before and can vouch for the quality of his products.

Thanks guys Yes, the last song is indeed the one I played at IVP last year. To be released on my next album, coming out in 2125

Ha ha epic demo, mate! https://www.youtube.com/watch?v=3db3HIQuGds