Archive for May, 2008

AY Club: Breath Of Air

Saturday, May 10th, 2008

As a postscript to the release of tracker2ay, here’s the reason I wanted to transfer tracker files back to the Spectrum in the first place: to play X-Agon’s 6-channel Breath Of Air (as featured on the AY Riders Satellite single) the way that God intended, on two Spectrums playing 3 channels each…

tracker2ay

Saturday, May 10th, 2008

Here’s a utility prompted by zxbruno and Eq both asking, in the space of two days, how to convert STC, SQT and PT3 music files to something you can actually play on a Spectrum. For those not in the know, STC and friends are Spectrum tracker file formats originally introduced by Sergey Bulba‘s AY Emulator and which are now the de-facto standard for archiving Spectrum demoscene music (most prominently on ZXDemo, ZXTunes and Sergey’s epic Tr_songs archive). Which means it’s a bit unfortunate that there’s not been an obvious way to transfer them back to the Spectrum.

In principle it should just be a case of locating the appropriate Z80 player routine and bundling that together with the music data. In practice it involves a lot of faffing about (such as repointing pointers to make up for slight rubbishness in the SQT data format, and writing a 5-line Basic loader/player). Now, thanks to this utility, you just need to type tracker2ay mysong.stc mysong.tap instead. (Oh, and it can convert to TAP, TZX or AY.)

If at this point you’re screaming “But why does it have separate source code if it’s written in Ruby, which is an interpreted language?” then award yourself 20 geek points. Ah, you see, this time I’ve been playing with rubyscript2exe (and tar2rubyscript) to create all-in-one executables that everyone can enjoy without worrying about library dependencies and things. (But obfuscates the code in the process. But in a good way.) Please do check out the source code if you’re curious about that sort of thing, because I reckon it’s one of the best bits of code I’ve written in a long time, in a ‘nicely-written code’ sort of way rather than ‘evil complicated hacks that go together to do something superficially elegant’.