Search found 1109 matches

by James
Mon Nov 18, 2024 11:31 am
Forum: Mind Monitor
Topic: Engagement Index
Replies: 1
Views: 35

Re: Engagement Index

You are missing some braces in #1 and in #2 for the single value band power just average the channels with sum divided by count. I would also recommend you also check the HSI and exclude any channels with poor data quality. I'd go with #2, but they should work out the same. Just note that average is...
by James
Sat Nov 16, 2024 10:14 pm
Forum: Mind Monitor
Topic: Raw / FFT Saved in CSV?
Replies: 1
Views: 70

Re: Raw / FFT Saved in CSV?

https://mind-monitor.com/FAQ.php#csvspec

Discrete frequency binned data is derrived from RAW, so there is no need to also include it. Also there are many many different ways to calculate discrete frequency bins.
by James
Sat Nov 16, 2024 2:59 pm
Forum: Mind Monitor
Topic: FFT Discrete View
Replies: 3
Views: 59

Re: FFT Discrete View

Check out this, which includes links to my GitHub with coding samples:
https://mind-monitor.com/FAQ.php#oscspec
by James
Sat Nov 16, 2024 2:09 pm
Forum: Mind Monitor
Topic: FFT Discrete View
Replies: 3
Views: 59

Re: FFT Discrete View

No. It expands the Y axis.
by James
Sat Nov 16, 2024 2:09 pm
Forum: Mind Monitor
Topic: FFT Discrete View - X Axis
Replies: 1
Views: 40

Re: FFT Discrete View - X Axis

The X horizontal axis is frequency, The Y vertical axis is the power level. There are no standard units, but if you want to use something in a paper, then Bels as this can be used in anything derrived from an FFT calc.
by James
Mon Nov 11, 2024 8:49 pm
Forum: Mind Monitor
Topic: Streaming PPG data
Replies: 4
Views: 4026

Re: Streaming PPG data

Tap on "Mind Monitor" in settings 10 times, and then reconnect the Muse. You will get a prompt that it's enabled after tapping 10 times.
by James
Sun Sep 22, 2024 11:20 am
Forum: Mind Monitor
Topic: Preparing Single-Channel EEG Data from Mind Monitor (Muse-S Headband) for EDF Conversion
Replies: 1
Views: 755

Re: Preparing Single-Channel EEG Data from Mind Monitor (Muse-S Headband) for EDF Conversion

See the streaming FAQ for data rates, units etc: https://mind-monitor.com/FAQ.php#oscspec Mind Monitor does not do any filtering. The Absolute values calculated by the Interaxon SDK are filtered by the SDK for powerline noise, blinks and jaw clench. If you want to convert the data between formats wi...
by James
Thu Sep 12, 2024 11:49 pm
Forum: Mind Monitor
Topic: FFT from raw data - Alpha problem
Replies: 3
Views: 1082

Re: FFT from raw data - Alpha problem

I don't think you're doing anything wrong, but you are doing something differently to them. That doesn't mean it's wrong. You could try emailing their tech support and just asking if they'll share the basic concepts of how they're doing it. If they answer, post it here! It's that or Ghidra and a lot...
by James
Thu Sep 12, 2024 1:12 pm
Forum: Mind Monitor
Topic: FFT from raw data - Alpha problem
Replies: 3
Views: 1082

Re: FFT from raw data - Alpha problem

Interaxon's exact FFT algorythm is closed source, so I can't tell you exactly what they're doing, other than I know they're filtering jaw clench, blinks and powerline noise. But, this looks good to me! You've got Theta pretty much spot on. There are a ton of options for FFT, so there is no "cor...
by James
Fri Aug 09, 2024 9:28 am
Forum: Mind Monitor
Topic: Mental Workload Study
Replies: 15
Views: 6744

Re: Mental Workload Study

Get the average and then subtract that from every value.
Calculating relative waves from absolutes is a different function for a different purpose.