receive bang at a specific computer time

I don't think there is an object that does that by itself, but you could easily patch it.

One solution would be to have a [metro 1000] sending a time message to [date] every second, and compare the given time to your cue list. You could store that cue list in a hh:mm:ss format into [coll], and just query the current time formatted the same way. If you get an output from your [coll], then a cue point is reached:

Another solution is to rely on [transport] and use [timepoint] to get a point at a desired time:

Thanks. The problem is that it is not precise to use Metro 1000 to get the exact change of the second in the computer clock. I did it with metro 1 to get the time but that eats a lot of CPU.

I'm pretty sure the [transport] + [timepoint] approach have a precision of 1 tick by design, which gives 960 ticks per second at 120bpm. You can increase the [transport] tempo to increase that resolution if you want, but it's already way below an acceptable margin of error. The [metro] in that example I provided is just for previewing the transport's time, not for actually triggering the events.

Regarding the [metro] + [date] + [coll] approach, if you want more precision, you can indeed reduce the delay. 1 millisecond is probably overkill, but 10 or 100 is maybe more manageable for your CPU while still providing good synchronization.

You could also try using [qmetro] instead of [metro] for lower CPU usage while retaining good precision.

What do you want to synchronize exactly? How much of a margin of error is possible?

You said that both computers are not connected to a network, so I assume they have no internet access, so no time synchronization, so it is quite unlikely they will start in sync to begin with.

[maxurl] & internet time services?

to auto start (boot) computers at same time

you need precisely synced computer clock, and then usuall

boot at set time script

What has max to do with that ?

apropos "without network". what about using WLAN USB sticks for 5 dollars each?

Wlan is time wise not reliable enough. There is always dropouts especially on longer distances.

What do you want to synchronize exactly?

I wan't to start a visual conductor (with different tempi and bars etc.)
I started doing it with W-lan sync sending the information to receiver patches from a host but there were always drop-outs. Now I do it with Lan and it works fine but it's sometimes 50meters cable and I still hope for a version I don't need the Lan cable.

I'm still not sure how well the computers will stay in sync if every computer has its own app, starting in sync but I thought it's worth trying.

So your initial statement

“in order to have different computer at different places start at the same time without a network“

was missleading, I thougth you want to boot computers ...

wlan shoud also work ok, but not public internet,

if you make own closed 2.4g wlan using strong Access Point,

and use UDP you will have no dropouts at all.

I did such things many times, also for many connected clients.

one can compensate distance latency if

IPs of longer distance computers are known and defined.

if you want to try if computer time could stay in sync,

capture time using shell, you can lower polling interval to 1ms

or even 0.001 ms if such precision is needed.