[Eeglablist] Muse Monitor to EEGLAB timestamp/sampling rate issue

Arnaud Delorme arno at ucsd.edu
Wed Jan 2 10:42:49 PST 2019


Hi Patrick,

I have issued version 3 of the Musemonitor import plugin for EEGLAB and it allows to compute or set the sampling rate.
Let me know if it works better for you.

Best wishes,

Arno

> On Dec 31, 2018, at 4:34 PM, Patrick Wu <poboxpatwu at gmail.com> wrote:
> 
> James over at Muse Monitor has been invaluable in helping out but there's still a few questions I hope to get support with. I understand that the Muse SDK time-stamps based on buffering by the Bluetooth module. However, data collected through Muse Monitor (which should have a 256Hz sampling rate) is automatically sampled and time-stamped at 300Hz in EEGLAB. Resampling to 256Hz in EEGLAB just downsamples the record. 
> 
> Looking at the RAW data exported to csv by Muse Monitor, the average "sampling rate" (estimated from the number of data points divided over a 30s difference in time-stamps) is actually around 330Hz... This difference makes it so that records are noticeably shorter after importing into EEGLAB. How does EEGLAB determine the sampling rate when the time-stamps of the imported record is irregular? Is there anyway to specify the sampling rate when importing data?
> 
> -Patrick
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