I am working on building a sonar sound, so I thought it might be best to just get a beep going and work from there. I found a description of a pd patch by Andy Farnell, which I have converted to max but unfortunately it doesn't seem to work.

I have a feeling it is to do with the float number to modulo~ 2, which requires a signal float input, but the f 0 the system uses doesn't produce a signal. Any ideas?

counter-controlled-beeping

Maybe like this? Timing doesn't seem right for a sonar ping though - more like an alarm...

Yeah the timing is just an example at the minute. I have made it so it varies depending on distance

Counter controlled beeping