X-Ray - "Boremloza" (Numen, Atari XL/XE) [Oscilloscope Visualization]

"Boremloza", a song by Łukasz Sychowicz otherwise known as X-Ray, member of a group of Atari XL/XE composers called "Grayscale". This song is featured in the Atari XL/XE demo "Numen" by Taquart, released in 2002. From the Atari SAP Music Archive, played with asapconv version 5.2.0 (Linux).

[@StereoTyp0]

The squarewave vibratos are fun to watch

[@Foster_MSX]

One of the coolest chips after 2000 for small Atari :)

[@Miesiu]

What does show blue bar? What does indicate yellow point ?

[@enfys02]

My all time favourite demochoon, rad B-)

[@nicco1690]

I think you made a rendering error in channel 2, from 1:28 and beyond. It appears that you unmuted both channels 1 and 2 when recording channel 2, leading to the combined waveforms that you see here, with it becoming very apparent at 2:07. Reguardless, great song!

[@KYLXBN]

I have noticed that too, to be honest! But I was assuming that it can't be a muting mistake because it was technically impossible for me to change the mute setting while recording a channel... Now that you mentioned it, I will try to investigate further. Thanks!
Edit: It is probably that my channel muting patch for asap has a problem. I'll check it out :)
Edit again: Wait... I didn't patch asap's code... I patched sc68, not asap. What the heck could be going on in here. It returns back to normal at around 8:34... Could it be some sort of POKEY trickery used by the composer?

[@HeatmanMKIII]

How do you make music like this only with a windows PC? i don't have any old computer with dedicated sound chip.
I have tried trackers, but you have to supply the samples, so isn't chiptune

[@KYLXBN]

Hello :)
I will interpret the question as "how the composers make these songs" compared to "how I make the oscilloscope visualizations of these songs". Sorry if I am understanding wrong.
Well, I am not very familiar with Atari XL/XE development. But I can say that they are most definitely either using a tracker that runs on the actual hardware (Atari XL/XE in this instance) or one that runs in Windows that emulates a POKEY sound chip. Not all trackers require samples, some are actually made to use a certain sound chip and interface with them. The trackers that require samples are probably MOD or XM trackers, which are required to use samples because the Amiga Paula chip (as targeted by MOD trackers) operates using samples, and the Gravis Ultrasound (the initial target of the XM module format) also uses samples.
As I said, I am not familiar with Atari XL/XE trackers, but if we were talking about the C64 SID, you can use GoatTracker which runs on Windows and emulates the SID chip, or you can use SidWizard which runs on an actual C64 and uses the internal SID chip. You can make SID chiptune that way :) As for the NES, there is the ever-famous Famitracker that runs on Windows, or you can use NTRQ by Neil Baldwin which runs on an actual NES. Same thing with the Atari XL/XE, I guess.

[@HeatmanMKIII]

@@KYLXBN Ohh, Sorry, This was exactly what i wanted to know

[@moonowo]

RMT (Raster Music Tracker)