Search found 45 matches

by Negative Charge
Sat Jul 24, 2021 10:27 am
Forum: new projects and releases: demoscene
Topic: BBC Micro SID Tunes
Replies: 28
Views: 517

Re: BBC Micro SID Tunes

fwibbler wrote:
Fri Jul 23, 2021 9:22 pm
Can you do one with all of the C64 R-Type music (I mean all the levels)?
I think I can manage that: https://bbc.godbolt.org/?autoboot&disc1 ... _music.ssd

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by Negative Charge
Fri Jul 23, 2021 8:24 pm
Forum: new projects and releases: demoscene
Topic: BBC Micro SID Tunes
Replies: 28
Views: 517

Re: BBC Micro SID Tunes

BBC Micro SID Tunes 5 Even more conversions from the C64 SID to the BBC Micro’s SN76489. Emulation: https://bbc.godbolt.org/?autoboot&disc1=https://negativecharge.github.io/files/beebsidtunes-05.ssd (Best in JSBeeb, recent B-Em (internal sound filter disabled) or b2 builds) Download for hardwar...
by Negative Charge
Thu Jul 22, 2021 5:25 am
Forum: new projects and releases: demoscene
Topic: BBC Micro SID Tunes
Replies: 28
Views: 517

Re: BBC Micro SID Tunes 1

Another 14 conversions from the C64 SID to the BBC Micro’s SN76489. Emulation: https://bbc.godbolt.org/?autoboot&disc1=https://negativecharge.github.io/files/beebsidtunes-04.ssd (Best in JSBeeb, recent B-Em (internal sound filter disabled) or b2 builds) Download for hardware: https://negativecha...
by Negative Charge
Tue Jul 20, 2021 7:08 pm
Forum: new projects and releases: demoscene
Topic: BBC Micro SID Tunes
Replies: 28
Views: 517

Re: BBC Micro SID Tunes 1

anightin wrote:
Mon Jul 19, 2021 6:37 pm
jms2 wrote:
Sat Jul 17, 2021 9:41 pm
If my design works, and you are ok with soldering, I can send you one.
Happy to build one for @Negative Charge when available :)
Thank you for the kind offer. Now that I have an FPGA Beeb, I’ve less use for this expansion than I did previously, but interested to see how this one works out.
by Negative Charge
Tue Jul 20, 2021 7:06 pm
Forum: new projects and releases: demoscene
Topic: BBC Micro SID Tunes
Replies: 28
Views: 517

Re: BBC Micro SID Tunes 1

Diminished wrote:
Tue Jul 20, 2021 6:26 pm
No idea if it's feasible, but how about Jon Dunn's Ocean Loader 4?
I’ve given Ocean Loader 5 a go (posted on Twitter a week or so ago). I can try 4, but I think it didn’t sound so good when I last tried. Tools have been updated since, so may be better.
by Negative Charge
Tue Jul 20, 2021 7:05 pm
Forum: new projects and releases: demoscene
Topic: BBC Micro SID Tunes
Replies: 28
Views: 517

Re: BBC Micro SID Tunes 1

BBC Micro SID Tunes 3 14 further conversions from the C64 SID to the BBC Micro’s SN76489. Emulation: https://bbc.godbolt.org/?autoboot&disc1=https://negativecharge.github.io/files/beebsidtunes-03.ssd (If using B-em, switch off the internal sound filter. With b2 make sure you’re using a very rec...
by Negative Charge
Mon Jul 19, 2021 4:34 pm
Forum: new projects and releases: demoscene
Topic: BBC Micro SID Tunes
Replies: 28
Views: 517

Re: BBC Micro SID Tunes 1

Absolutely no pressure, keep up the great work -- really enjoying these =D> They’re in for disc 3… Parallax loses a lot of the definition due to the lack of filters but all 11mins+ are there, and Great Giana Sisters is without the digi drums, but sounds okay: B3B86C22-3DB0-492D-A3AB-138194561DAF.jp...
by Negative Charge
Sun Jul 18, 2021 9:48 pm
Forum: new projects and releases: demoscene
Topic: BBC Micro SID Tunes
Replies: 28
Views: 517

Re: BBC Micro SID Tunes 1

Since you ask, the title theme for Parallax for me is just mesmerising :) https://www.youtube.com/watch?v=rVZ2zfXlVSk That’s a tough one without a means to effectively simulate SID filters. It’s one I keep coming back to as I revise the conversion technique. I’ll put it down for disc 3, but it all ...
by Negative Charge
Sun Jul 18, 2021 6:27 pm
Forum: new projects and releases: demoscene
Topic: BBC Micro SID Tunes
Replies: 28
Views: 517

Re: BBC Micro SID Tunes 1

BBC Micro SID Tunes 2 14 more conversions from the C64 SID to the BBC Micro’s SN76489. Emulation: https://bbc.godbolt.org/?autoboot&disc1=https://negativecharge.github.io/files/beebsidtunes-02.ssd Download for hardware: https://negativecharge.github.io/files/beebsidtunes-02.ssd B10DF53A-6991-47C...
by Negative Charge
Sun Jul 18, 2021 5:30 pm
Forum: new projects and releases: demoscene
Topic: BBC Micro SID Tunes
Replies: 28
Views: 517

Re: BBC Micro SID Tunes 1

anightin wrote:
Sun Jul 18, 2021 4:11 pm
Awsome bringing SID to the Beeb without the SID hardware!

I'd love to hear:
  • Rambo Frist Blood Part II
  • Giana Sisters
  • Parallax
Thank you! You’ve picked three very tough ones there, so no guarantees but I’ll give them a go. Any specific subtunes in those SIDs?
by Negative Charge
Sun Jul 18, 2021 5:28 pm
Forum: new projects and releases: demoscene
Topic: BBC Micro SID Tunes
Replies: 28
Views: 517

Re: BBC Micro SID Tunes 1

and I’m open to suggestions for tracks to include on future discs if you have any favourites. I could make a lengthy list but I don't think you've done Crazy Comets and Zoids yet. Please do! :D Crazy Comets and Zoids should make disc 2 as there’s space. Rob Hubbard’s tracks can be a bit hit and mis...
by Negative Charge
Sun Jul 18, 2021 2:10 pm
Forum: new projects and releases: demoscene
Topic: BBC Micro SID Tunes
Replies: 28
Views: 517

Re: BBC Micro SID Tunes 1

Thank you! I’m converting as many of the tracks that I enjoy as I can, and will include those that turn out okay. Some tracks, especially those by Martin Galway, are well beyond the capabilities of the current conversion process and I can’t do them justice. Disc 2 is already underway, and I’m open t...
by Negative Charge
Sun Jul 18, 2021 12:15 pm
Forum: new projects and releases: demoscene
Topic: BBC Micro SID Tunes
Replies: 28
Views: 517

Re: BBC Micro SID Tunes 1

Thanks for the kind offer. I can just about work my way round a soldering iron. Very interested to see how you get on with it. I still have plans in the works to get better sound out of the native Elk ULA, but have got a bit distracted by the Beeb at the moment.
by Negative Charge
Sat Jul 17, 2021 8:07 pm
Forum: new projects and releases: demoscene
Topic: BBC Micro SID Tunes
Replies: 28
Views: 517

Re: BBC Micro SID Tunes 1

That’s good to hear! Thanks for testing. B-em and b2 in general seem to reproduce the sound better than beebem. I’ve been looking out for a second generation Electron Sound Expansion cartridge myself, but they appear to be rare beasts to find on the second hand market. I think making one myself from...
by Negative Charge
Sat Jul 17, 2021 11:44 am
Forum: new projects and releases: demoscene
Topic: BBC Micro SID Tunes
Replies: 28
Views: 517

Re: BBC Micro SID Tunes 1

I have had a try in BeebEm and B-Em and it sounds pretty amazing in both! Some tunes are slightly "crackly", but I wonder if this is just an emulation effect. I'll have a go on a real Beeb later and let you know how it goes. Thanks! The conversion process is inherently lossy due to the va...
by Negative Charge
Sat Jul 17, 2021 8:32 am
Forum: new projects and releases: demoscene
Topic: BBC Micro SID Tunes
Replies: 28
Views: 517

BBC Micro SID Tunes

BBC Micro SID Tunes 1 Hi all. I’ve been working on an approach to convert C64 SID tunes over to the BBC Micro’s SN76489 without the need for additional hardware. These are conversions rather than emulation of the SID, and hence lack the more complex SID effects/filters. It should (in theory) run on...
by Negative Charge
Tue Jun 08, 2021 5:37 pm
Forum: general
Topic: Music items found on tape (and one for Negative CHarge perhaps)
Replies: 3
Views: 238

Re: Music items found on tape (and one for Negative CHarge perhaps)

Here's a quick conversion of the Georgia file on your disc. This should play back fine on an Electron and BBC Master, but will have issues on a BBC Micro due to where the code executes. It's not the best conversion as the source requires me to record to VGM, and then process further before convertin...
by Negative Charge
Tue Jun 08, 2021 1:29 pm
Forum: general
Topic: Music items found on tape (and one for Negative CHarge perhaps)
Replies: 3
Views: 238

Re: Music items found on tape (and one for Negative CHarge perhaps)

Hi *Tape, I have a version of the Dare Devil Denis loader music on this disk: https://github.com/NegativeCharge/Releases/raw/main/Discs/BBCMusic1.ssd It's an older conversion, and I may go back and revisit that disk at some point as the process I've used has matured a bit since then. For your JSBACH...
by Negative Charge
Tue May 04, 2021 9:23 pm
Forum: programming
Topic: Exile sampled speech on Electron version
Replies: 2
Views: 243

Re: Exile sampled speech on Electron version

Thanks! It helps clarify some of the assumptions I’ve made about the disassembly. It looks like two samples are packed into a byte… so 4 bits representing each sample. The sample data appears to be 1069 bytes or 2138 samples. The playback time for the sample is about 1.7 seconds which may suggest a ...
by Negative Charge
Tue May 04, 2021 6:44 pm
Forum: programming
Topic: Exile sampled speech on Electron version
Replies: 2
Views: 243

Exile sampled speech on Electron version

Hi all, Can anyone tell me a way to determine the sample rate / bit depth of the sample data used for the speech found in $.EXILE3 of the Electron version of Exile ? I’ve managed to extract the data, which I assume is in PCM unsigned format, and its relatively small size suggests it must be a low sa...
by Negative Charge
Sun May 02, 2021 12:41 pm
Forum: new projects and releases: demoscene
Topic: Open source vgm2electron Player
Replies: 0
Views: 241

Open source vgm2electron Player

I promised to release the source code for Elk Player. As I haven’t got the conversion process fully automated at this stage I’ve decided to release a version of the code that supports the output of Simon’s vgm2electron converter. This should work on both the Acorn Electron and BBC Micro series. The ...
by Negative Charge
Fri Apr 30, 2021 1:42 pm
Forum: new projects and releases: demoscene
Topic: Electro-Player
Replies: 7
Views: 326

Re: Electro-Player

I eventually came across ElkPlayer by NegativeChange, as I am an Acorn hardware musician I wanted to be able to get my own tunes running on it, but there was no source, so I made my own! (No hard feelings my friend, I do much very appreciate your work!) =D> No hard feelings at all! I'm glad to see ...
by Negative Charge
Wed Apr 07, 2021 8:30 pm
Forum: 8-bit acorn emulators
Topic: B-Em
Replies: 522
Views: 69012

Re: B-Em

Does anyone have a version of the latest B-em with the VGM logging from the 1.4 version ported over? I’ve made an attempt and have it compiling okay under VS2019 but I don’t think I’m calling the log function at the right time as I hear slowdown when multiple channels are playing and sometimes a ch...
by Negative Charge
Wed Apr 07, 2021 5:40 pm
Forum: 8-bit acorn emulators
Topic: B-Em
Replies: 522
Views: 69012

Re: B-Em

Does anyone have a version of the latest B-em with the VGM logging from the 1.4 version ported over? I’ve made an attempt and have it compiling okay under VS2019 but I don’t think I’m calling the log function at the right time as I hear slowdown when multiple channels are playing and sometimes a cha...
by Negative Charge
Mon Apr 05, 2021 6:57 pm
Forum: new projects and releases: demoscene
Topic: Elk Player
Replies: 41
Views: 1531

Re: Elk Player

A quick update... I’ve added two .SSDs to my GitHub. The full Out Run soundtrack via Elk Player and a conversion of a number of Atari ST game and demo tracks. I’ve also managed to get playback working at 1KHz via the ULA. Possibly not the best example, but here’s a conversion of the Shadow of the Be...
by Negative Charge
Tue Mar 30, 2021 9:07 pm
Forum: new projects and releases: demoscene
Topic: Elk Player
Replies: 41
Views: 1531

Re: Elk Player

NC.... very impressive. =D> =D> I would like to invoke Terry Thomas and say, " My dear chap, you're a delightful swine! " It would appear you had this idea about 1 year before me! I came up with this very idea about December last year. As a youth I was always fiddling with making sound, s...
by Negative Charge
Mon Mar 29, 2021 6:29 am
Forum: new projects and releases: demoscene
Topic: Elk Player
Replies: 41
Views: 1531

Re: Elk Player

Really impressive, both in quality and amount of memory needed :mrgreen: =D> Thanks! I've already made a few improvements to the playback at 200Hz, which requires a cycle-accurate delay of 5ms (adjusted for the processor it's running on) between the first and second notes every event from the inter...
by Negative Charge
Sat Mar 27, 2021 11:46 am
Forum: new projects and releases: demoscene
Topic: Elk Player
Replies: 41
Views: 1531

Re: Elk Player

A little more progress. I’ve been investigating playback at 200Hz and this appears to have a dramatic impact on the quality of the sound output (Check around 2:15 in the following video). I’m looking at 500Hz as a possibility, but memory constraints would severely limit the length of the track due t...
by Negative Charge
Thu Mar 25, 2021 8:22 am
Forum: new projects and releases: demoscene
Topic: Elk Player
Replies: 41
Views: 1531

Re: Elk Player

Great achievement, I will be interested to see your source code when it's released. Would you be interested in giving a demo at one of the Thursday night developer ABUG meetings on zoom? I would love to hear you talk through how it works. Thanks Chris. A lot of the process has been eloquently docum...
by Negative Charge
Wed Mar 24, 2021 4:57 pm
Forum: new projects and releases: demoscene
Topic: Elk Player
Replies: 41
Views: 1531

Re: Elk Player

I've been working on version 2 of the player, utilising the 100Hz Interval Timer and 50Hz DisplayStart event to synchronise some basic visualisations. Here's a preview of where I'm going with this, using Martin Galway's Galaforce Title Music as the source material: http://i3.ytimg.com/vi/_VTpGae8swM...

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