Play KSS files in your browser
The music of MSX computers and Sega's 8 bit consoles, ripped with the code that plays it. Play a KSS right here and save its songs as MP3. Nothing leaves your device.
Or drop it anywhere on this page
What you'll see
A file of many songs opens like a folder of them, and the one you pick plays at once, then fades. A file of one song plays the moment it opens.
- Its songs listed like a folder • Names from the file
- Its whole waveform • Half, 1.5× or double speed
- Show tags • Game, composer, system and voices
- Export • Save a song as MP3 or WAV
About KSS
A KSS holds a game's music with the Z80 code that plays it, ripped from MSX cartridges and disks, and from Sega's Master System and Game Gear, which share the MSX's processor. Konami's MSX soundtracks, with their SCC chip, are the best known.
Playing one runs that code on an emulated Z80, which drives the chips the game had: the MSX's AY-3-8910 and Konami's SCC, or the Sega consoles' SN76489.
Filepeek runs it in its own build of Game_Music_Emu inside your browser. A file of many songs opens like a folder of them, and the one you pick plays at once, then fades. Export saves a song as MP3 or WAV.
MSX music file
.kss
Format
- MIME type
- audio/x-kss
- Made by
- MSX music rippers in Japan
Inside the file
- Holds
- A game's Z80 sound code
- Chips
- AY-3-8910, SCC or SN76489
- Systems
- MSX, Master System and Game Gear
- Lengths
- Not in the file
Opens in every browser
Filepeek plays KSS files in Chrome, Edge, Firefox and Safari. No browser plays them by itself.
- YouChromePlays through Filepeek
- YouEdgePlays through Filepeek
- YouFirefoxPlays through Filepeek
- YouSafariPlays through Filepeek
Apps that open KSS
- Windowsfoobar2000 with foo_gep, and VLC
- MacVLC
- iPhone and iPadModizer
- AndroidZXTune
Questions
How do I play a KSS file?
Drop it on this page or choose Peek a KSS. Its songs are listed like a folder, and the one you pick plays right away.
Why is part of a song missing?
Songs for the MSX's FM chips, the FM-PAC's YM2413 and MSX-AUDIO, play only their parts on the AY-3-8910 and the SCC. The player Filepeek uses doesn't play those FM chips.
How long does each song play?
A KSS doesn't say how long its songs are, so each plays for up to 2 minutes 30 seconds and stops where it falls silent, then fades.
Can I save MSX music as MP3?
Yes. Pick a song, choose Export, then Save as MP3 or WAV.