Dual-tone multi-frequency (DTMF) signaling is a standard in telecommunication systems. This is a standard where keystrokes from the telephone keypad are translated into dual tone signals over the ...

[Rogal] wrote a cell phone application called ToneTool that generates audio tone sequences. It can be used to output DTMF and SelCall sequences which are used by telephone systems and ...

Vaším úkolem je vytvořit program, který uživateli vygeneruje WAV soubor s libovolným množstvím DTMF tónů, které uživatel zadá z klávesnice. Každý symbol se generuje jako krátké písknutí, ve kterém se ...

Abstract: A circuit is described which uses one oversampling frequency synthesizer in an interleaved mode to generate dual-tone multifrequency (DTMF) telephone dialing tones. The synthesizer is based ...