TapNoisemacOS Background Sounds provides continuous ambient audio. A typing sound app responds to your key presses. Rain in the background and a rain-themed key sound can therefore have very different rhythms.
Try the built-in option
Open System Settings › Accessibility › Audio and inspect Background Sounds. Choose an available sound and start at a low level. Some sounds or higher-quality files may require a download.
Listen during a reading pause as well as while typing. Continuous audio remains present when your hands stop, which can be pleasant or distracting depending on your preference.
Try interaction separately
Use the TapNoise demo with a theme such as Rain, Hushed or Woody. Interactive playback follows activity, so gaps in typing become gaps in that audio layer.
Do not assume the two products use the same recording because a theme has a similar name. Compare what you actually hear rather than the label.
Combine only if it helps
Begin with one layer, then add the other quietly. If you spend more attention managing the soundscape than doing the task, return to the simpler setup.
Neither arrangement guarantees better concentration for every listener. Keep a silent option available for reading or calls. For another comparison, see ASMR recordings versus interactive typing and balancing feedback with music.
Sources: Apple’s Background Sounds guide, TapNoise themes.