work with a sound card

[Eugene Lutsenko]

whether the program in Alaska programmatically control the frequency and amplitude, and can be a form of the output signal from the sound card?

[Auge_Ohr]

whether the program in Alaska programmatically control the frequency and amplitude, and can be a form of the output signal from the sound card?

you can use Tone(<nFrequency>, [<nDuration>])

[Eugene Lutsenko]

Thank you! And how to get the signal from the microphone?

[Auge_Ohr]

Thank you! And how to get the signal from the microphone?

do you want to record "Voice Mail" ?
try sndrec32.exe ( Win XP ) / SoundRecorder ( Win 7 / 8 )

[Eugene Lutsenko]

No, I would like to apply a software-controlled signal to the output of a sound card and get feedback from the external environment to its input