Search found 10 matches

by stellarpower
Tue Apr 09, 2024 3:44 pm
Forum: Mind Monitor
Topic: Filter Implementation
Replies: 0
Views: 1207

Filter Implementation

Hi, Was wondering if anyone knows any details about the filters in the Muse, what sort they are or how they are implemented. I seemed to have the impression that they are done on the hardware, but now I'm thinking, are the bandpowers perhaps performed within the SDK? Has anyone managed to glean any ...
by stellarpower
Mon Jul 17, 2023 10:51 pm
Forum: Mind Monitor
Topic: Raw Graph vs OSC - High-Frequency Noise
Replies: 8
Views: 1341

Re: Raw Graph vs OSC - High-Frequency Noise

Afraid the quality isn't great as the only way I managed was to record the screen on my phone, which has suffered a bit from the MP4 compression on the fly, but this is an example of what I am seeing. I've got two largeish troughs on the temporal lobes I've dotted in pink and used to align and scale...
by stellarpower
Mon Jul 17, 2023 9:52 pm
Forum: Mind Monitor
Topic: Raw Graph vs OSC - High-Frequency Noise
Replies: 8
Views: 1341

Re: Raw Graph vs OSC - High-Frequency Noise

Does the plot perform any interpolation, by the way?
by stellarpower
Mon Jul 17, 2023 9:44 pm
Forum: Mind Monitor
Topic: Raw Graph vs OSC - High-Frequency Noise
Replies: 8
Views: 1341

Re: Raw Graph vs OSC - High-Frequency Noise

Apologies for the delay; I have modified my OSC code to output a copy to CSV as well. I was going to compare against the CSV from the app and graph it, but, I see this file seems to have the bandpowers in it, but not the raw data. I also managed to find a copy of what should be the protobuf specific...
by stellarpower
Tue Jul 11, 2023 5:54 am
Forum: Mind Monitor
Topic: Order of the raw EEG data
Replies: 11
Views: 2323

Re: Order of the raw EEG data

Yes, I had been using this repo , which uses python-osc, and I think that must abstract the bundle aspect away. Hence why it took a bit of fiddling to work out the format, as I moved it into Crystal and the messages I'd dealt with before using the same library there were all just single messages, wi...
by stellarpower
Mon Jul 10, 2023 11:18 am
Forum: Mind Monitor
Topic: Order of the raw EEG data
Replies: 11
Views: 2323

Re: Order of the raw EEG data

The main reason was for trying to debug this high-frequency noise I'm seeing; I was adapting the OSC forwarding code I have to spit out some CSV and then aim was to compare it against what the app saves and graph both offline, and I wanted to get it as accurate and precise as possible. I'm also not ...
by stellarpower
Sun Jul 09, 2023 9:11 pm
Forum: Mind Monitor
Topic: Order of the raw EEG data
Replies: 11
Views: 2323

Re: Order of the raw EEG data

Also, I'm on an old version of the app (2.1.1) - did the bundling format change at all at some point? I only seem to be getting single messages in my bundles, and from what I see on Wireshark this tallies up with what my OSC library implementation is telling me - the UDP packets are about 60 bytes l...
by stellarpower
Sun Jul 09, 2023 8:23 pm
Forum: Mind Monitor
Topic: Order of the raw EEG data
Replies: 11
Views: 2323

Re: Order of the raw EEG data

So, would the recommended way to get the timestamp for each packet be to take the timestamp on the bundle, then assume the sampling rate is known and increment the timestamp from the bundle for each message accordingly? Also, is the sample rate 256 Hz for the Muse 2? I have the product code MU-03 on...
by stellarpower
Sat Jul 08, 2023 3:20 pm
Forum: Mind Monitor
Topic: Raw Graph vs OSC - High-Frequency Noise
Replies: 8
Views: 1341

Re: Raw Graph vs OSC - High-Frequency Noise

Thanks, it's mainly the time-series I'm interested in at the moment; I did mean to look into the FFT settings more out of interest, but, am not worried right now re figuring this out. Do you reckon it's most likely just the plotting then? As if the effective refresh rate of the plot is lower than th...
by stellarpower
Sat Jul 08, 2023 1:03 pm
Forum: Mind Monitor
Topic: Raw Graph vs OSC - High-Frequency Noise
Replies: 8
Views: 1341

Raw Graph vs OSC - High-Frequency Noise

Hi, I have read in a few posts that the raw EEG data, as forwarded over OSC, hasn't had any processing applied - it's exactly as comes out the SDK (please correct me if I am wrong). However, when I compare the graph I get of the raw OSC data on my PC against what I see on my phone, the graph in Mind...