I should also mention a couple of the tools I've used to help assist me when recreating these songs:
vocalremover.org has been great with separating bass, drums, and music. No login required (tho depending on how many times you've used it, they may rate limit your use for that day based on your IP):
https://vocalremover.org/splitter-ai———————————————————
I have this .FLP template that can help you remove instruments from a song if you have the right instrument preset to use (or one that sounds fairly close enough): soyjak.download/f.php?h=0sbjadf-&d=1
(You will also need this plugin for it to work:
https://www.kvraudio.com/product/kn0ck0ut-by-st3pan0va)
Basically you want to move your base audio (the original music) into Mixer Track 3 (the blue colored bar in the mixer rack) and the audio you want removed from the original music into Mixer Track 2 (the red colored one). Layer them both under each other if you have them as audio files and hit spacebar to hear it play out, the instrument that you want removed should be mostly gone if everything goes well. You might want to boost the volume a bit with something like Fruity Limiter on the Master track since the output signal is quieter than going in for some reason (it'll also be a bit delayed if you plan on exporting it as an audio file as well, so keep that in mind).
Ideally you'd probably want to use Phase Cancellation instead (if you can) as that'll output a much cleaner track with the instrument of choice removed. Plus it's a good way of determining if your instrument sounds pretty close to what it originally sounds like in Zellig's music. You won't be able to do this with every instrument (namely some synths) but with some of the stock acoustic instruments like drums and guitars have been pretty easy to cancel with. More information on what is Phase Cancelling here:
https://youtu.be/8hVtDMFZj3Q?t=54 ———————————————————
Ultimate Vocal Remover has been great for isolating vocals and separating reverb and delay on tracks:
https://ultimatevocalremover.com/ (Enter this GUI VIP key in the settings menu to unlock more models to use: 02aeb35c203ed0a9)
This Google Document details the current best AI tools used for instrument separation and what have you. Pretty useful and informative (warning: it's fucking loooooooong):
https://docs.google.com/document/d/17fjNvJzj8ZGSer7c7OFe_CNfUKbAxEh_OBv94ZdRG5c/edit#heading=h.roiuj54hzww3———————————————————
CenterCutGUI is great for splitting the sides and center of an audio file, great for determining where certain instruments are placed without the center or sides getting in the way of hearing:
http://www.moitah.net/download/latest/Center_Cut_GUI.zipSpecial shoutout to Fruity Stereo Shaper for helping with isolating either the left or right channel in a audio signal, as well as Wave Candy and SPAN for analyzing the frequencies and spectrogram of oncoming audio; good for determining the timbre, volume, frequencies boosts and cuts of an instrument as well as any effects like reverb that are easier to see. (SPAN download here:
https://www.voxengo.com/product/span/)