The function below provides a simple method to play a "tone" using dotNet, however, the simplicity does impose certain limitations

• It is intended for VB.Net programs running under Windows and it is unlikely to work on IOS, Android, Linux ...
• There may be old versions of Windows which throw an exception
• Early versions of Windows (pre Win 7) create the tone using an Interval Chip. Windows 7 and later versions use the soundcard.
• DotNet will flag an exception with any frequency outside the range 32 to 32767 Hz
• Most Interval Chips/Soundcards will be silent or unpredictable when attempting to reproduce very high/low frequencies.
  • Soundcards usually have a lower limit between 32 Hz and 100 Hz
  • Soundcards usually have an upper limit between 10000 Hz and 30000 Hz
• Human hearing varies and a person with "normal" hearing may not be able to detect some of the playable frequencies
• Keep the beep duration short - it is difficult to stop the tone until it's time is up

Private NotePlaying As Boolean = False
Private Sub PlayNote(f As Integer, t As Integer)
 If NotePlaying Then Exit Sub
 NotePlaying = True
 System.Console.Beep(f, t)
 NotePlaying = False
End Sub
  

You can call the Sub using

PlayNote(frequenc, tim)
  

Where Frequenc is the required frequency (pitch) for the note in Hertz (Hz)
and t is the duration (time) that the note should play in Milliseconds (mS)
Use f=512, t=1000 for a "Middle C" tone lasting 1 second

DigitalDan.co.uk