Tone generator Windows Forms app made around 2010. Default frequency is 440 Hz which is A4, and buttons increment the frequency up or down by one semitone. Play up to 6 tones at once Play continuous ...

Telephone dial tones are one aspect of modern life that we take for granted, but there is a history there. Wikipedia offers some interesting reading on the subject. Back in 1954 when Bell Telephone, ...

Canvas: (http://bit.ly/30YTM7I). This circuit is a modulus counter plus toggle flip-flop. The “Do” musical note f Do has a frequency of 261.626 Hz, and the period ...

A440, also known as Stuttgart pitch, is the musical pitch corresponding to an audio frequency of 440 Hz. This pitch standard is crucial for tuning musical instruments, particularly the note A above ...