The following equation will give the frequency f of the

So you can find out logically, whether a sound recording was made in Europe or in the U.S.Ī pure tone with the frequency f = 440 Hz has the amplitude function:Ī = sin (880 π × t) - where t is given in seconds. is a minor third higherĬlose to the pitch of A 1/B 1 = 58.27 Hz (58 Hz). The factor 0.94387431268169349664191315666757.Ī sound engineer should know the following: The AC hum of 50 Hz in Europe is close to In the twelve-semitone scale the frequency of the next semitone (halftone) is higher by The sound frequencies of the 88 keys on the piano are: The German system is used also in many other countries, as there areĪ 'normal' piano has the following dimensions: width 145 to 150 cm, height 115 to 125 cm, depth 52 to 60 cm.Ī typical 'keyboard' has 61 keys today. The standard pitch tuning is A4 (A above middle C) − in German-speaking countries it is called a’. Scientific Pitch Notation ( SPN), also known as American Standard Pitch Notation

The English and American scientific system versus the German system Music notation systems − Music frequencies of equal temperament tuning

Naming of musical notes and piano keys.

Midi number to note chart