From: Joerg Hansmann (info_at_jhansmann.de)
Date: 2002-02-26 11:29:46
Dear Jim:
----- Original Message -----
From: Jim Meissner <jpmeissner_at_mindspring.com>
To: <buildcheapeeg_at_yahoogroups.com>
Sent: Tuesday, February 26, 2002 3:46 AM
Subject: Re: [buildcheapeeg] EEG FFT Display help
>Dear Joerg:
>
>I looked at the Cool Edit site and it seems they want $76 for the small version and $400
>for the Pro version. Which version do you have and will the $76 one work for me?
The screenshots I have posted are from the small version.
However the Pro - version seems to be able to display multiple channels:
http://www.psychosensory.com/pies-session/cool-edit-session-screen-labeled.jpg
(perhaps Dave can provide some information about the Pro - version ...)
>Can
>this display show frequencies as low as 0.1 Hz ?
Yes. (Depending on set FFT bands)
>How would I feed my EEG data into the
>Cool Edit package?
Cool Edit can read /write many standard sound formats and different raw data
formats:
e.g.
ASCII (with one sample value per line)
8 bit and 16 bit PCM raw (mono, stereo, diffenet byte orders and arbitrary sample rates).
>Do I need a translator of some sort?
IMO : yes. You will need a little program, that extracts your channel data.
>The disadvantage of the this
>package is that it can only be used after the fact for analysis and not be live.
Yes. It is an offline viewer / editor.
...
One further disadvantage of the cooledit waveform display that should be mentioned:
Cooledit uses some form of interpolation between the samples that give nasty overshoots
in the display. (However the color setup can be chosen in a way that lets you clearly
see, what are real samples and what is interpolated)
Regards,
Joerg
This archive was generated by hypermail 2.1.4 : 2002-07-27 12:28:38 BST
