Problem with a simple sequencer

Reply to Problem with a simple sequencer on Thu, 23 Jun 2016 13:59:48 GMT

Trive — Thu, 23 Jun 2016 13:59:48 GMT

Hi everyone,

I'm new to Pure Data and I'm making some beginner level exercises to learn the basics elements of this language.

I would like to make a simple sequencer where the four bangs blink one after another, from left to right every 1000 ms.

When the outlet which corresponds to the fourth parameter of the select box is reached, it should activate the message box and sending the number 0 to the float box, in order to resetting the latter.

The problem is that the message box doesn't send the 0 to the float box (unless I manually click on the message box) and the float box continues to be incremented, as shown by the number box wired to the outlet of the float box.

Here is the patch: sequencer.pd

Have you an explaination for this kind of behavior?

Reply to Problem with a simple sequencer on Thu, 23 Jun 2016 15:22:15 GMT

whale-av — Thu, 23 Jun 2016 15:22:15 GMT

@Trive Hello Trive........
It has to do with the order of operations..........http://puredata.info/docs/manuals/pd/x2.htm chapter 2.3.2.
It is sometimes not obvious why something doesn't work as expected. The order of operations means that the next "+ 1" is banged into the "f 0" after the "0".....
Here is your patch with a small delay, so as to make sure that the "0" arrives later......
sequencer2.pd
and here it is fixed by fixing the order of operations using a trigger.......
sequencer3.pd
The second one (sequencer3) is the better solution.......
David.

Reply to Problem with a simple sequencer on Thu, 23 Jun 2016 15:43:04 GMT

Trive — Thu, 23 Jun 2016 15:43:04 GMT

Thank you so much David for your precious info and patches!