Re: synchronise the start of [writesf~] to (network) clock time?

Hello,

The easiest low teck solution would be to have a dedicated loudspeaker in front of every microphone, and send an audible "bang" simultaneously.
cheers
c

Le 16/10/2025 à 10:18, Peter P. a écrit :
> * IOhannes m zmoelnig via Pd-list <[email protected]> [2025-10-16 10:06]:
> [...]
>> if you want to have sample-accurate resolution, this is a non-trivial task.
>>
>> zexy's [time] will give you the current system time, but Pd uses an audio
>> buffer, so the actual system time might will typically not correspond (nor
>> have a constant offset) to an imaginary timestamp attached to a "sample" as
>> it leaves your soundcard.
> Do I understand correctly that one sample from my ADCs will arrive at a
> random moment within the lengh of one buffer in Pd?
> 
>> we did something like synchronous recording on multiple devices in the wilma
>> project a couple of years ago (<https://wilma.kug.ac.at>).
>>
>> iirc, it involved special hardware that was synched via radio (not NTP over
>> WiFi) and encoded the wall clock timestamps within a dedicated audio
>> channel.
> Ah yes, WILMA!
> 
> In my case I want to go for the best possible resolution without a
> dedicated radio clock and with standard laptop hardware. Is banging
> [time] at every microsecond still the best way maxing my cpu?
> 
> Thanks a lot!
> Peter
> 
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