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EnderDude

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Posts posted by EnderDude

  1. Posted

    Just to reiterate my comment on that video, I'm surprised that for the past 41 years this machine was available to the public, only recently have we discovered techniques on how to get "controlled" pwm with the filter, along with trumpet-like sounds, etc. It makes me wonder if anyone actually came up with techniques like this before, or if all of this is genuinely a relatively new thing.

     

     
     
    • Like 1

  2. Posted

    There's also the possibility of resorting to a quick oscillation between two pitches to in essence "dither" a pitch between the two pitches. I have yet to hear how they would sound with RMT at a 50hz refresh rate rather than 100hz. It's a quick and dirty fix, but that's what I would resort to if I can't seem to find any pitches close enough to a certain note and don't want it detuned.

    • Like 1

  3. Posted

    10 hours ago, VinsCool said:

    Finally, it is done!
     

     

    It sure was a lot of work, more than I expected, but I'm very happy of the result now.
    In the process I added yet another notes table, this time it's Distortion C at 1.79mhz. It's a little lacking but did a fine job for the high pitched notes with almost no tuning error for this cover :) 

    As promised, here's all the project files I used, including my most recent frequency tables.
    I hope you liked it @ivop, I really have spent a lot more time than planned for it, but I just couldn't help myself diving further into all that Atari 8-bit stuff. :D 

     

    Freeze Project Files.zip 23.87 kB · 9 downloads

    Man, I love this cover! I too would like to experiment with modifying the frequency tables as well. Are there any resources you can point to so I can read up on how to change them?

    • Thanks 1

  4. Posted

    2 hours ago, ivop said:

    @emkay Or share the .rmt on AtariAge instead of just YouTube videos. Nobody learns from YouTube videos.

    Yeah. I was asking for the .rmt to be able to add portamento, among other things such as changing the octaves of some instruments, vibrato, etc.. If someone's already transcribed it to RMT, it would be much easier for everyone to make their own modifications of the transcription to experiment with it themselves rather than making a transcription from scratch again, right?

  5. Posted

    10 hours ago, emkay said:

    Pulse Width Ring Mod Wiz

     

     

    I love this! Do you think you could send the .rmt to see if I can maybe try to add in manual portamento by using FSHIFT among other things? I'd love to experiment with this. :)

    • Like 1

  9. Posted

    This will probably be the last version.
    Listed are the changes made in version 4:

    • Used distortion C instead of distortion E for the alternate "burping" instrument.
    • Added vibrato to the lead instrument in the part from 0:42 to 0:57 and fake portamento to the bass in the part from 0:26 to 0:42 (using real portamento with distortion C just sounds like noise).

     

    • Like 7

  11. Posted · Edited by EnderDude

    1 hour ago, emkay said:

     

    In this function, all emulation is correct. It's getting problematic that there is a "fixed" timing on the real machines. But emulations don't work like the real hardware. That's why a lot of combinations weren't possible in RMT.

    Can you give an example of "lowering" and "no lowering" ?

    Altirra seems to have the most propper emulation. Slight timing problems and the real volume mixing isn't still found. 

    If you try to listen to my cover of Bionic Commmando in any of the revisions I've posted earlier, you can hear the synth dropping by an octave when the two channels sync for a brief moment (1:42 is a good example). The song channels were rendered with multidumper, which probably uses asap for pokey emulation. For examples of it not happening, I can point to any of your covers you've recorded in Altirra.

  12. Posted

    38 minutes ago, emkay said:

    That is the question of the century :)

    It could mean the physical behavior that two of those channels cutting the waves result in a "doubled" waveform switching. 

    So the channels build a higher (double ) frequency on the 1st channel. 

     

    Speaking of doubling the frequency, when both the channels' frequencies sync up for a brief moment, in some sap players such as asap, it lowers the note by an octave, and in others like rmt and altirra, that doesn't happen. Does real hardware sound more like asap or altirra when it comes to this filter behavior?

  15. Posted

    20 minutes ago, emkay said:

    Nice video explanation. 

    You know the 1st channel is always "modulo" to the 2nd channel. 

    Possibly split it into several Instruments to get a a stable "burping" sound? 

    Sometimes a "rolling" tone is resulting with no noisy overlay, if you understand. 

     

    Hm. That sounds like a good idea. I'll try it out later. Thanks!

  16. Posted · Edited by EnderDude

    So I should ditch the filter and the arpeggio instruments, and use noise and square instruments to resemble the spectrum version a bit more? Okay, but before I do, I'll show you what I hear in Altirra and rmt: 

     

  17. Posted · Edited by EnderDude

    5 hours ago, zbyti said:

    back in the day I started this game only for this music :D Your version is almost perfect only weird (to me) sounds at 0:23-0:38 spoil the party.

    Is it the 1.79 Mhz instrument? Yeah, the tuning depends on which player you use it. It sounded more in-tune in rmt (with apokeysnd.dll) and Altirra.

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