All Background Illustrations by sachi

Announcement: Recruitment of Special Guest Curators (Illustrators)

As we prepare to exhibit the music archived in our museum on YouTube,
we are seeking illustrators who can create fantasy background artwork to accompany each piece. (Paid)

If you are interested, please read the details via the link below and submit your entry.
We sincerely look forward to your artistry bringing new light to the stories of this museum.

(Applicants must reside in Japan and be able to communicate in Japanese.)

Request details and entry form

Welcome to Discoseum.
I am Potwi, the Head Curator of this establishment.

Within these halls, you will find fantasy music excavated
from two ancient and unknown realms: Arukuni and Kanokuni
— worlds long hidden from your knowledge.
Even now, newly unearthed melodies continue to be discovered
and preserved (sound-kept) in our exhibits.

All compositions on display are license-free,
allowing visitors not only to enjoy them as pure listening experiences,
but also to freely use them as background music for visual works, illustrations,

games, treaming content, tabletop RPGs, and more.

Before exploring the museum, we kindly ask that you read our User Policy
to ensure proper understanding of usage rights.
If detailed documents are not your cup of tea,
simply reviewing the User Policy Abstract below will suffice in most cases.

Please, take your time and enjoy your visit.

— Head Curator Potwi

Announcements related to Polycordium (不協和世界), including timely updates on newly unearthed compositions and museum news.

Head Curator Potwi's X:

This account is like a dried-out sponge cake — filled with half-baked murmurs and empty crumbs. But on rare occasions, ideas begin to take shape seriously. Your follows and interactions may just breathe life into new exhibits and increase the pace of updates. For past works and achievements, please visit the Composer section of the museum.

Official X of Polycordium:

YouTube Channel:

In addition to our collection of background music loops for work and study, this channel showcases music related to "不協和世界(Polycordium)".

Here is our latest release:

News

10/30/25

[YouTube] "Valley Beside Eld'ragon" Follow-up Investigation Report Released

We have released the follow-up investigation report on "Valley Besdie Eld'ragon", excavated in Kanokuni, with the cooperation of our Special Curator. Please check the details on our YouTube channel.

10/10/25

[City/Town] Announcement of a Newly Unearthed Track

9/30/25

[YouTube] "E.C.H.O" Follow-up Investigation Report Released

We have released the follow-up investigation report on "Royal Library", excavated in Arukuni, with the cooperation of our Special Curator.
Please check the details on our YouTube channel.

8/30/25

[YouTube] "Royal Library" Follow-up Investigation Report Released

We have released the follow-up investigation report on "Royal Library", excavated in Arukuni, with the cooperation of our Special Curator.
Please check the details on our YouTube channel.

User Policy Abstract

Downloading and Enjoying Displayed Music
Editing for Loops or Similar Uses
Use as Background Music (BGM):
Includes usage in videos, illustrations, live streams, TRPGs, etc., for both commercial and non-commercial purposes.

Prohibited Actions:

Claiming the music as your own creation.
Redistributing the music.
Unauthorized reuploads.
Using the music for purposes that violate public order and morals.
Any defamatory acts against the displayed works, this website, or others.
Using the music exhibited in this museum as training material for machine learning or similar purposes, or engaging in equivalent actions.

When using the exhibition music as background music for videos, illustrations, or streams,please include a credit (no permission or report is required).Please indicate in or alongside the work that the music is by Potwi.

Sounds

Field

City/Town

Boss

Others

Special

BOOTH

BOOTH