Wrong info.sfreq when using channels with different sfreq

[K1ssmE]

• MNE version: 1.9.0
• operating system: Windows 10

When using “mne.io.read_raw_edf(edf_path, include = “xxx”)”, if the channels in edf have different sfreq, there’ll be different info.sfreq with different include-list probably.

raw = mne.io.read_raw_edf(r'D:\Users\014446\Desktop\Test-001.edf', preload = False)

Code above told me sfreq = 1000Hz
Code below told me sfreq = 200Hz

raw = mne.io.read_raw_edf(r'D:\Users\014446\Desktop\Test-001.edf', preload = False, include = "EEG C4-M1")

I guess mne.info.sfreq will only return sfreq of a certain channel, or just return the maximum sfreq of all channels.

So I wonder if there are some ways that I could get a list of sfreq of each channel without individually pick each channel in “include = xxx”.

THX anyway.

[cbrnr (Clemens Brunner)]

I don’t think that MNE exposes this information. If you want to see the sampling frequency of each individual channel, I recommend using edfio as follows:

from edfio import read_edf

edf = read_edf("Test-001.edf")
print(edf.signals)

Here, edf.signals is a tuple of edfio.EdfSignal objects, which contain everything related to a specific channel (including the sampling frequency).

[K1ssmE]

Yeah, I have changed my code from MNE to EDFIO, it works indeed.

By the way, the solution that I just pick each channel I need in a loop and store them in seperate variables also works, though complex but still acceptable at least for my project.

Anyway, really thanks for your assistance!