I want to play Beep sound in my Mac Os X and specify duration and frequency. On Windows it can be done by using Beep function (Console.Beep in .Net). Is there anything equivalent in Mac? I am aware of NSBeep but it does not take any parameters.
On the Mac, the system alert sound is a sampled (prerecorded) sound that the user chooses. It often sounds nothing like a beep—it may be a honk, thunk, blare, or other sound that can't be as a simple constant waveform of fixed shape, frequency, and amplitude. It can even be a recording of the user's voice, or a clip from a TV show or movie or game or song.
It also does not need to be only a sound. One of the accessibility options is to flash the screen when an alert sound plays; this happens automatically when you play the alert sound (or a custom alert sound), but not when you play a sound through regular sound-playing APIs such as NSSound.
As such, there's no simple way to play a custom beep of a specified and constant shape, frequency, and amplitude. Any such beep would differ from the user's selected alert sound and may not be perceptible to the user at all.
To play the alert sound on the Mac, use NSBeep or the slightly more complicated AudioServicesPlayAlertSound. The latter allows you to use custom sounds, but even these must be prerecorded, or at least generated by your app in advance using more Core Audio code than is worth writing.
I recommend using NSBeep. It's one line of code to respect the user's choices.