- play note

- Tuning, Temperament (Stimmung, Temperatur):
  - Equal tempered / Equal temperament (gleichstufige Stimmung)
  - Well tempered (Wohltemperiert)
    - Werckmeister temperament
    - ...
  - Just intonation (reine Stimmung)
    - Pythagorean tuning (Pythagoraeische Stimmung)
    - ...
  - Regular temperatment
  - harmonies: arabic + violin

- configuration
  + UI (colours ...)
  + later: speed vs. accuracy ... maybe.
- UI:
  + later: handheld optimization ... maybe.

- l18n
  + more translations

- "About"? (version, copyright, license, ...)

- remove frequencies from  pitchmeter. maybe.
- turn off screensaver when recording

- ideas
  + input level indicator
  + silence detection
  + two phase frequency detection

- UI:
  + keyboard doesn't work an maemo5?!