Meaning of numbers in files WHATSAPP VOICE NOTES? I want to know how I cand find an especific voice note from de file ''WhatsApp Voice Notes''?
I thought that the numbers of the files means year,  months or something like that but I couldnt find it because I have thousands of voice notes
If I want an especific voice note from 18 February 2015 how will be named?
I have the file on my PC so I can't use my smartphone

Thanks
Short answer

On your PC ( or mobile ) do a wildcard search for PTT-20150218*.opus to get a list of all voice notes of 
18 February 2015

Folder numbering is YYYYWW where YYYY is the year and WW is the week number of year - 201726 is the folder for voice notes created in the current week (at the time of writing )

Long answer

As per  How to get specific whatsApp voice note from your mobile which says


  Whatsapp creates folders and names them as week numbers of the year. So folder number 201612 (in the example above) means that what ever voice notes I've sent or received  between 21st March 2016 to 27th March, should be saved in that folder


(Emphasis Supplied)

In this example, week 12 of that year covers 21sr to 27th March

So, you would need to calculate from calendar the week of year your date falls in and see the corresponding folder, which happens to be 201508 (please double check the week number of year - I did it in a hurry )



Edit: I just created few voice notes and the logic given above is correct.


Folder numbering is YYYYWW where YYYY is the year and WW is the week number of year - 201726 ( path /storage/emulated/0/WhatsApp/Media/WhatsApp Voice Notes/201726 )
Within the folder, files are arranged in PTT-YYYYMMDD-WA000X.opus, where X  increases as created