I am using DTMF since it has been released and I am planning using it even more intensively.
I would like to have more information in order to get a reliable detection and to try to hide from listeners the DTMF tones has much as possible.
I notice that during normal playback DTMF digits are regularly detected in the music, I also notice that occasionally the DTMF code is not detected by RB hense the associated task not started.
Could you please publish some best practice?
Here are a few questions I can think of.
What is the recommended number of digits to use?
Is it necessary to have a blank before the first digit, after the last one and between two digits?
What are the recommended digit duration and the ratio with blanks between digits? ie 40ms digits separated by 20ms blank.
Is detection only on left channel?
What is the recommended audio level for digit? What is the signal ratio between digits and background music? And what is the recommended value for the RB DTMF level detection setting?
Could the DTFM checker and the RB debug info window display some king of quality detection when detecting DTMF?