TapNoiseSpace, Return and Delete do not have to sound identical to a letter key. In TapNoise, these keys have their own character, so a sentence has more shape than one recording repeated for every action.
Compare a sentence, not a single key
A space arrives between almost every word. Return marks a paragraph or a submitted command. Delete often appears in short bursts while you revise. Each occupies a different place in your normal typing rhythm.
To hear the balance, write two sentences, start a new line and correct a word. If you test only letters, you miss the keys that punctuate most real work.
This is sound design, not a hardware test
The audio does not measure the size or material of the keycap attached to your Mac. It is TapNoise’s interpretation of that key’s role. An external keyboard may sound physically different while the app still plays the selected theme.
Your audio device also changes the result. A small speaker can make a larger-key sound less full than it is through headphones, so compare on your everyday output.
Find a comfortable balance
Switch between themes in the demo, using the same short passage. Pick the theme where repeated spaces and corrections stay pleasant over time. Lower app volume if the larger keys dominate a quiet room.
If you want an extra layer as keys come back up, try key release sounds separately. Keep one setting fixed while changing the other so you know what improved the experience.
Sources: TapNoise keyboard sounds, volume controls.