# Trouble in Re-referencing my data to both earlobes in EEGLab

**URL:** <https://mne.discourse.group/t/trouble-in-re-referencing-my-data-to-both-earlobes-in-eeglab/6921>\
**Category:** Support & Discussions\
**Tags:** preprocessing, eeg, referencing\
**Created:** [May 18, 2023, 4:26pm UTC](https://mne.discourse.group/t/trouble-in-re-referencing-my-data-to-both-earlobes-in-eeglab/6921 "2023-05-18T16:26:44Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![MariaPiresCoelho](https://yyz2.discourse-cdn.com/free1/user_avatar/mne.discourse.group/mariapirescoelho/32/2660_2.png) [@MariaPiresCoelho](https://mne.discourse.group/u/MariaPiresCoelho)\
**Post date:** [May 18, 2023, 4:26pm UTC](https://mne.discourse.group/t/trouble-in-re-referencing-my-data-to-both-earlobes-in-eeglab/6921/1 "2023-05-18T16:26:44Z")

</div>

Hi,

Firstly, thank you for the open discussion on EEGLab matters. I am currently preprocessing my data and discourse groups like these are very useful.

I am having difficulties in re-referencing my data.

By default in Brain Vision Recorder, my reference channel is Fp1. When I import my .vhdr files to EEGLab interface, this channel doesn’t appear in “Edit → Channel Locations” (as I am assuming EEGlab also refers to Fp1 as my reference channel).

However, I have two references, in both earlobes: Fp1 and AF8, and I need to reference my data to the mean of these two channels’ data.

I have checked the procedure in EEGlab Tutorial, where I can create a new channel (in Edit → Channel Locations) in case the original reference does not appear visible, as it is the case, in Fp1 for instance. Yet, by creating Fp1 as a new channel and set it as my reference (as described in Tutorials → Preprocess Data → Re-referencing → Retaining the reference channel), the new channel Fp1 does not contain its original data.

With this issue, I cannot proceed to the next step, where it is described how to use two references as I wish to use (in Tutorials → Preprocess Data → Re-referencing → Re-referencing to multiple electrodes).

I am using the brain products 64-channel EEG system.

Thank you in advance, and I hope I was clear in describing my problem.  
I look forward to hearing from you.

---

<div class="post-metadata">

**Author:** ![wmvanvliet](https://yyz2.discourse-cdn.com/free1/user_avatar/mne.discourse.group/wmvanvliet/32/100_2.png) [@wmvanvliet](https://mne.discourse.group/u/wmvanvliet)\
**Post date:** [May 19, 2023, 8:35am UTC](https://mne.discourse.group/t/trouble-in-re-referencing-my-data-to-both-earlobes-in-eeglab/6921/2 "2023-05-19T08:35:17Z")

</div>

> Firstly, thank you for the open discussion on EEGLab matters

This is the forum for the MNE-Python software, not EEGLab. I’m not sure we’ll be of much help. You could try the EEGLab mailing list.

---

<div class="post-metadata">

**Author:** ![MariaPiresCoelho](https://yyz2.discourse-cdn.com/free1/user_avatar/mne.discourse.group/mariapirescoelho/32/2660_2.png) [@MariaPiresCoelho](https://mne.discourse.group/u/MariaPiresCoelho)\
**Post date:** [May 19, 2023, 1:11pm UTC](https://mne.discourse.group/t/trouble-in-re-referencing-my-data-to-both-earlobes-in-eeglab/6921/3 "2023-05-19T13:11:04Z")

</div>

Thank you!