Playing just a few samples

Hi all,

Sometimes I have the need to play to the user a few samples ( not beeps or something like that) generated by ToneGenerator. 
The only I found is the use of AudioSource::getNextAudioBlock, but this solution is not what I need, because of the iterative process.

The only I need is to send the buffer-samples once to the default audio device.

Have anyone any experience about this?  

Thanks in advance