jsbeeb - Music 5000 emulation

[robsonjb1]

Hi all,
I've ported over the Beebem emulation of the Music 5000 to my jsbeeb fork. The audio output is done through the newer 'audio worklets' technology and as a result will only work in Chrome for the time being (hopefully Safari will catch up with this soon).

The code is here:
https://github.com/robsonjb1/jsbeeb

... and I'm hosting jsbeeb here (this branch also has the Teletext adaptor too):
https://jsbeeb.azurewebsites.net?model= ... #&autoboot

To use, just select the 'BBC B with Music 5000' model and boot off the include Music 5000 system disk.

It seems reasonably stable at the moment but I'm curious to hear how people find it. Naturally it is going to keep the browser working hard but at least with this approach the sample generation doesn't tie up the main UI worker thread.
I'm completely new to doing anything with audio so will welcome any comments!

Enjoy,
Jason.

[robsonjb1]

Hi again - would anyone happen to know the copyright status of both the AMPLE ROM and the Music 5000 system disk ? (for inclusion with jsbeeb)

From reading previous threads on stardot, I believe the creator Chris Jordon is reasonably active here ? (I don't have a way of messaging him directly).

Any help gratefully received...
Jason

[Matt Godbolt]

Thanks for asking!! This stuff is tricky I know and it's a pain to track down. I have to be careful with jsbeeb on github; though of course we can consider still having the ROMs available elsewhere somehow if that ends up being an issue

[Pernod]

Hi all,
I've ported over the Beebem emulation of the Music 5000 to my jsbeeb fork.

I see there's a comment in your code 'Not sure why left/right seem inverted but this appears to work for me?', they're probably swapped. It was a known issue with BeebEm but was fixed in https://github.com/stardot/beebem-windo ... ad1321e626

[robsonjb1]

It was a known issue with BeebEm but was fixed in https://github.com/stardot/beebem-windo ... ad1321e626

Aha! yes that will be it. It looks like we both found the same issue. I chose to fix it by swapping over the speaker channels, but I'll change my jsbeeb fork to do it the way the Beebem devs did (swapping around the stereo mapping in the generator array).

Thanks!
Jason

[CHRISJJ]

Wow! Well done! Though https://jsbeeb.azurewebsites.net/?model ... #&autoboot fails for me: https://i.imgur.com/IW02leg.png . Also https://github.com/robsonjb1/jsbeeb .

Hi again - would anyone happen to know the copyright status of both the AMPLE ROM and the Music 5000 system disk ?

Yes

(for inclusion with jsbeeb)

I hereby grant permission for non-commercial use of HMS software in jsbeeb to robsonjb1. Recorded in my profile.

Chris

[Matt Godbolt]

Thanks Chris!