Sampling frequency of the accelerometer data

[sidratulmoontaha]

As mentioned in the Muse developer website, the sampling frequency of the accelerometer sensor should be 50Hz. But when I see the csv file saved with all the raw data including EEG and Accelerometer data, I see that there is same number of data points present for both EEG and accelerometer. Is the accelerometer data also then saved with 256Hz? While using the acceleometer data for movement noise cancellation from EEG data, will I then have to use the sampling frequency of 256Hz instead of 50Hz?

[James]

When the CSV writes a line, it takes the current value of each item and writes it out. This is necessary due to the CSV format requiring a value on each line.
If you use the ".Muse" binary file format (or OSC live streaming), you will get each item at it's sampling frequency.