+Kamil Tomasz INSIAK No. Technically it has three DCOs. The fourth pcm channel is made from a glitch. Here's from Wikipedia: "Due to imperfect manufacturing technologies of the time and poor separation between the analog and digital parts of the chip, the 6581's output (before the amplifier stage) was always slightly biased from the zero level. By adjusting the amplifier's gain through the main 4-bit volume register, this bias could be modulated as PCM, resulting in a "virtual" fourth channel allowing 4-bit digital sample playback." It's because the output has dc offset (the supposed zero is not at zero) it can be modulated. Afaik this is only possible on the 6581, not on the newer 8580. It's possible to play samples on that one too, but I think it needs to use the three DCOs for it then. :)
+VitinhoCarneiro I don't know. Mahoney is in his own league when it comes to the sid chip :) .. I'm no programmer, but I guess it'll need plenty of memory and cpu (for being the c64 that is ;)) for doing such thing, which won't be suitable for demos and games. Anyone knows if his technique works on all sid revisions?
You make one of the oscillators to be square and just stay at logical 1 from what I understand. Then you use the usual trick. Or maybe then you use the ADSR. IDK I'm not a programmer ;-)
Wow, I haven't heard this in a while! I *loved* this tune back when I was a kid, I'd fire up the game just to listen to this song over and over again; eventually someone stuck it in a demo which you could leave on this song on infinite loop - would play it for hours!
One of the best songs from Hülsbeck. The CD release of "To be on top" is very old by now, and most people who are interested in this music must have heard of it. If not, however, it has a great version of this very song, so check it out!
That's called triggering. A real digital 'scope(this is a simulation) records what it sees on the probes, and when the signal goes past the trigger point, the scope grabs a bit more, and displays it, usually zoomed in so you can pan back and forth. I you can generally set the scope to trigger when the signal either rises or falls past the trigger point; on the rising or falling edge, as it's called. I don't think I've seen a scope that can be set to trigger on both edges, probably because that would likely make it harder to read. I've seen this switch edges, which is why I even bring it up.
I remember that it was a different version of the first song used in a tracker, someone might associate the name of the program? Hard tracker, fast tracker or something,,,
Short version: Sending bytes of data to the volume register which, due to a 'flaw' in the SID chip, produced a sort of click. In effect 4bit samples separate to the 3 main channels could be used.
Could you please create a video on "Fox" by Oliver Mohr, or "A Fox In My Box" by Erin (Svetlana Tovarisch)? I would really appreciate it! Thanks! .sid files: tinyurl.com/jv9rlnh
Any panning you perceived from the C64 is a result of phasing. Two mono speakers arranged in stereo playing a phased sound trick you into hearing movement.
I like how a actual flaw in the c64 hardware actually made it possible to add a fourth pcm voice :)
First i've heard that was a thing! :o
Ever since I heard about the SID is always three generators + sample means 4 channels
+Kamil Tomasz INSIAK No. Technically it has three DCOs. The fourth pcm channel is made from a glitch. Here's from Wikipedia:
"Due to imperfect manufacturing technologies of the time and poor separation between the analog and digital parts of the chip, the 6581's output (before the amplifier stage) was always slightly biased from the zero level. By adjusting the amplifier's gain through the main 4-bit volume register, this bias could be modulated as PCM, resulting in a "virtual" fourth channel allowing 4-bit digital sample playback."
It's because the output has dc offset (the supposed zero is not at zero) it can be modulated. Afaik this is only possible on the 6581, not on the newer 8580. It's possible to play samples on that one too, but I think it needs to use the three DCOs for it then. :)
+VitinhoCarneiro I don't know. Mahoney is in his own league when it comes to the sid chip :) .. I'm no programmer, but I guess it'll need plenty of memory and cpu (for being the c64 that is ;)) for doing such thing, which won't be suitable for demos and games. Anyone knows if his technique works on all sid revisions?
You make one of the oscillators to be square and just stay at logical 1 from what I understand. Then you use the usual trick. Or maybe then you use the ADSR. IDK I'm not a programmer ;-)
Wow, I haven't heard this in a while! I *loved* this tune back when I was a kid, I'd fire up the game just to listen to this song over and over again; eventually someone stuck it in a demo which you could leave on this song on infinite loop - would play it for hours!
This is definitely one of the more visually entertaining entries so far.
One of the best Music Tracks for the good old C64. Love the Game. Hülsbeck at its best!!!
2:03 the best SID waveform that no other chip has :)
Pretty sure that same waveform is used in Mr marvelous
I always wondered how is that one created.
sounds like a real harpsichord, honestly.
I think it's a combination of triangle, pulse and sawtooth, but I'm not entirely sure.
@@quadpad_music it's a bitwise AND combination of a pulse wave and a triangle wave
Wow, really interesting what the cute SID wa able to generate. I havn't seen seen a video showing the scope-views - but I really like it!!!
I really love this videos. Could you make one of Chris Huelsbeck's "Madness"? it's such a beautiful tune and the first SID I ever heard.
I love these oscilloscope videos, but the series is missing a very memorable tune: Krakout. Would love to see it. :)
Oldschool C64.
One of the best songs from Hülsbeck. The CD release of "To be on top" is very old by now, and most people who are interested in this music must have heard of it. If not, however, it has a great version of this very song, so check it out!
Could you makes some oscilloscope dumps from Giana Sisters?
Love the highscore music on Giana Sisters. So chill. Looking forward for more oscilloscope videos.
Oh and by the way: search for Giana's Return ;-)
What makes it so that the wave appears to be centered in the oscilloscope window, no matter the pitch of the wave?
That's called triggering. A real digital 'scope(this is a simulation) records what it sees on the probes, and when the signal goes past the trigger point, the scope grabs a bit more, and displays it, usually zoomed in so you can pan back and forth.
I you can generally set the scope to trigger when the signal either rises or falls past the trigger point; on the rising or falling edge, as it's called. I don't think I've seen a scope that can be set to trigger on both edges, probably because that would likely make it harder to read. I've seen this switch edges, which is why I even bring it up.
BTW, how did you record PCM voice separately? jsidplay2 doesn't have option to mute Master Volume.
Also, jsidplay2 can mute samples now.
Rob Hubbard's Flash Gordon?
I remember that it was a different version of the first song used in a tracker, someone might associate the name of the program? Hard tracker, fast tracker or something,,,
It was in a tracker but I don't remember the name of the software.
Where did that description come from?
knowyourmeme.com/memes/mitochondria-is-the-powerhouse-of-the-cell
4:00, Pure '80s
IDK, sounds 90s to me.
What oscilloscope programm you using?
In one of his videos, he stated that he wrote his own software.
I think he explains it in one of the comments for his "Spectrum 128k Auf Wiedersehen Monty" video.
how did they get a 4th channel?
Short version: Sending bytes of data to the volume register which, due to a 'flaw' in the SID chip, produced a sort of click. In effect 4bit samples separate to the 3 main channels could be used.
4 channels?
Could you please create a video on "Fox" by Oliver Mohr, or "A Fox In My Box" by Erin (Svetlana Tovarisch)?
I would really appreciate it! Thanks!
.sid files: tinyurl.com/jv9rlnh
so is this from a game?
Yes, To Be On Top is a game where you play a musician who has to build up a career. You actually 'compose' songs during the game.
Back in the days the sample stuff was awesome and very impressing. But now it sounds odd and not fitting.
Can bad apple oscilloscope view?
sorry, but you need a SID file for it
panning is broken
Panning? It's SID, dude :D 100% monophonic ;)
Any panning you perceived from the C64 is a result of phasing. Two mono speakers arranged in stereo playing a phased sound trick you into hearing movement.