[Eeglablist] Issues importing 32 bit neuroscan CNT files recorded in scan 4.5

[John Curtin]

For the record, we have had no problems importing Neuroscan cnt files with
various hardware versions (synamps, synamps 2, synamps rt; 16 bit and 32
bit).  We use 64 bit matlab to avoid memory issues in wndows.  We use XP and
Windows 7.
John J. Curtin, Ph.D.
Professor of Psychology
Director of Clinical Training, and
Associate Chair of Graduate Studies
University of Wisconsin
1202 West Johnson St.
Madison, WI 53706

Email: jjcurtin at wisc.edu
Website: http://dionysus.psych.wisc.edu
Office: 608-262-0387
Lab: 608-262-5621
Cell: 608-217-6221
Fax: 608-262-4029


On Thu, Sep 1, 2011 at 11:06 AM, Prof. Dr. Stefan Debener <
stefan.debener at uni-oldenburg.de> wrote:

>  Hi Leif,
> in my old lab we used a synamps2 system and never had problems importing
> the 68 channel cnt files, apart from some memory issues. This was between
> 2006 and 2008, so we probably used an older version of neuroscan ...
> Best,
> Stefan
>
>
>  ------------------------------
> *From:* eeglablist-bounces at sccn.ucsd.edu [eeglablist-bounces at sccn.ucsd.edu]
> on behalf of Stephen Politzer-Ahles [politzerahless at gmail.com]
> *Sent:* Wednesday, August 31, 2011 10:17 PM
> *To:* Leif Oines
> *Cc:* eeglablist at sccn.ucsd.edu
> *Subject:* Re: [Eeglablist] Issues importing 32 bit neuroscan CNT files
> recorded in scan 4.5
>
>  Leif,
>
> I do not have an answer, but for what it's worth I have also never been
> able to import 32-bit .CNT files into EEGLAB (at least, not when running
> 32-bit Windows XP). On the other hand, I never had problems importing
> epoched .EEG files; therefore, my processing pipeline involves first
> re-referencing and epoching the data in Neuroscan (if necessary,
> re-referencing could be done later in EEGLAB instead) and then importing the
> epoched data to EEGLAB for the rest of the preprocessing.
>
> I would also be very interested to hear about any solutions for importing
> the continuous data, though.
>
> Best,
> Steve Politzer-Ahles
>
> On Tue, Aug 30, 2011 at 8:00 PM, Leif Oines <leifdoines at gmail.com> wrote:
>
>> Hello,
>>
>> I'm wondering if anyone else seems to have issues importing 32 bit
>> neuroscan CNT files into eeglab (I've made sure that the 32 bit option is
>> flagged when i go to read in the files). The data were recorded with a
>> synamp2 64 channel amp. When I view the data with the eeglab plotter data
>> from several channels do not appear at any scale, and the latencies of the
>> channels that do display seem off in comparison to what things look like in
>> neuroscan 4.5. There was a similar post made around 2009 but no apparent
>> resolution. When I open epoched neuroscan EEG files, however, things seem
>> fine. I suppose I could do all my preprocessing in neuroscan and then read
>> in my EEG files, but I'm trying to move my entire pipeline into eeglab. Any
>> help or even guesses would be wonderful.
>>
>> Thanks,
>> Leif Oines
>>
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>
>
>
> --
> Stephen Politzer-Ahles
> University of Kansas
> Linguistics Department
> http://www.linguistics.ku.edu/
>
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