KeyslamTactile · sound test
Leopold FC660M sound test
A Leopold FC660M with Cherry MX Browns, recorded by stu556 with the recorder on a wrist pad right in front of the space bar. It's the brighter of two takes the uploader made on this board.
Updated
Short answer: This Leopold FC660M with Cherry MX Brown switches sounds crisp and close: the recorder sat on a wrist rest between the typist's hands. The uploader, stu556, calls it the “more trebley” of two takes. CC0, cut into 43 takes.
Leopold FC660M sound test
Each button plays real strikes from one strength band of this recording. Natural mix lets every key vary, like normal typing. Headphones help.
Press a band to hear “leopold” typed on Leopold strikes from that band, then type below.
About this recording
- Keyboard
- Leopold FC660M
- Switches
- Cherry MX Brown, tactile
- Keycaps
- A mix of enjoyPBT and GMK
- Recorded by
- stu556 on Freesound
- Uploaded
- December 4, 2018
- Original file
- WAV, 16-bit, 44.1 kHz, stereo, 3:03
- Microphone
- A Zoom recorder (written “ZOOM HD1”) on a wrist pad between the hands
- License
- CC0 1.0 (public domain)
- In Keyslam
- 43 takes, 4 of them key-up
“Typing on a mechanical keyboard (Leopold FC660M, mx browns, enjoypbt and gmk caps)” — stu556, on the Freesound page (checked November 2, 2026)
The board
Leopold is a South Korean keyboard maker known for plain, solidly built boards. The FC660M is a compact 66-key layout that keeps a dedicated arrow cluster, sold with Cherry MX switches. This one has MX Browns, Cherry's tactile switch.
The keycaps are a mix: enjoyPBT, a dye-sublimated PBT set, and GMK, which makes thick doubleshot ABS caps. Keycap material and thickness change the pitch of each keystroke, which is one reason this pack sounds different from our other MX Brown recording.
Measured from the app's pack files
What the Leopold FC660M pack contains, band by band. Peak is the median take's loudest sample; audible length is how long it stays within 30 dB of that peak. Soft to slam spans 12.3 dB. How the bands are made.
| Band | Percentile of strikes | Regular-key takes | Space, Return, Delete | Median peak | Audible length |
|---|---|---|---|---|---|
| Soft | 8th–30th | 6 | 4 | −12.7 dBFS | 50 ms |
| Medium | 38th–62nd | 6 | 4 | −7.2 dBFS | 67 ms |
| Hard | 70th–88th | 6 | 4 | −2.8 dBFS | 50 ms |
| Slam | 92nd–100th | 6 | 3 | −0.4 dBFS | 49 ms |
Close-miked between the hands
The uploader placed the recorder on a wrist pad between their hands, in front of the space bar. That's closer than a desk mic, so you hear each keycap's attack in detail. It's a 16-bit, 44.1 kHz stereo WAV, 3 minutes 3 seconds long, uploaded in December 2018.
Three minutes of typing gave the slicer plenty to choose from: six regular-key takes per band, 3–4 per band for the wide keys and 4 key-up takes. From soft to slam the peaks rise 12.3 dB, the 9th widest of the 15 packs.
Leopold vs MX Brown and WhiteFox
Two tactile neighbours. The first shares the switch; the second shares the enthusiast-board character.
- MX Brown: the same Cherry MX Brown switch on an unnamed board, recorded from further away. Less attack, rounder.
- WhiteFox: Hako Violet tactiles on a WhiteFox, recorded with a USB desk mic. A different tactile switch and a different case.
Who it suits
Pick Leopold if you like hearing the detail of each keystroke: the attack, the bump, the full clack of thick caps.
Pick something else if you want the switch a little further away (MX Brown) or a deeper, cushioned sound (Topre).
Leopold FC660M: questions
Are the keycaps on this Leopold PBT?
Partly. The uploader lists “enjoypbt and gmk caps”, so it's a mix of PBT (enjoyPBT) and thick ABS (GMK) keycaps, not a pure PBT set.
Why is this called the treble version?
stu556 recorded two takes on the same keyboard and labeled this one the brighter of the two. It's the one Keyslam uses.
Leopold or MX Brown: which pack should I pick?
Same switch on different boards, keycaps and microphones. Leopold is close-miked and detailed; MX Brown is a little softer around the edges. Play both on this page before you choose.
Keep exploring
Hear Leopold FC660M on every keystroke.
$3.99 once after a 7-day free trial. On MacBooks with the motion sensor it follows how hard you type; on other Macs you pick the strength.