frank desben

I have a seemingly very simple question I simply can't figure out:

I want to use [sah~ 0], the left input is anything, let's say a [cycle~ 1.1].

I want to read the value of the cycle~ whenever the phasor reaches "0".

It does not seem to work like that for some reason.

I came up with a work-around - but that one seems to malfuntion if the speed of the phasor is high.

Dear all,
I have a seemingly very simple question I simply can't figure out:

I want to use [sah~ 0], the left input is anything, let's say a [cycle~ 1.1].
I want to read the value of the cycle~ whenever the phasor reaches "0".

It does not seem to work like that for some reason.
Can someone tell me how to fix it?

sah-0-sample-and-hold-with-0-as-trigger

I can't check your patch here, but are you using [delta~], as in [phasor~ 22] --> [delta~] --> [sah~ 0] inlet right?

[delta~] will report less than zero at the instant that the phasor ramp descends back to zero, triggering the [sah~ 0], like a zero-crossing detector.

Hi
I can't check your patch here, but are you using [delta~], as in [phasor~ 22] --> [delta~] --> [sah~ 0] inlet right? 

. . . and inside gen~, it'll do it as FAST as you like ;)

The reason your version might be unreliable at high frequency triggers is the old sigvs thing I guess. [sah~ 0] (without [delta~]) won't catch every instance of a zero value.

is it really accurate and will always work with the delta~- or can it also get too fast and lead to dropouts?

Thanks Brendan, that seems to work,
is it really accurate and will always work with the delta~- or can it also get too fast and lead to dropouts?

how would one do it in gen,
i'm not really sure how that would work.

yes, it is highly accurate, dependent upon your signal vector size (in Audio Settings). inside gen~ calculations are sample accurate, eg 44100 times per second. But entering/leaving the gen~ domain is accurate on a per-vector basis, eg 44100/64samples.

Doing this in gen~ uses exactly the same objects/algorithm as in MSP - although this is not always the case

Hi
yes, it is highly accurate, dependent upon your signal vector size (in Audio Settings). inside gen~ calculations are sample accurate, eg 44100 times per second. But entering/leaving the gen~ domain is accurate on a per-vector basis, eg 44100/64samples.

I have temporarily abandoned Windows and MacOS, so no more Max examples from me I'm afraid.

ps
I have temporarily abandoned Windows and MacOS, so no more Max examples from me I'm afraid.

https://cycling74.com/articles/event-priority-in-max-scheduler-vs-queue

Brendan, thanks a lot for your advice, that was very helpful and an opportunity to try to appraoch gen~ :)

Brendan, thanks a lot for your advice, that was very helpful and an opportunity to try to appraoch gen~ :)
Frank


sah~ 0 - Sample and Hold with "0" as trigger