Search found 18 matches

by darvish_sam
31 Mar 2014, 23:25
Forum: Software Development
Topic: How and why to add random inter trial intervals?
Replies: 0
Views: 2550

How and why to add random inter trial intervals?

Dear all, Could you please let me know: 1- How to add inter trial intervals with random duration of 500-2500 ms between consecutive motor imagery trials? 2-What is the main reason of adding this random duration of ITI between MI trials? (Actually I have googled it but no clear response was found exc...
by darvish_sam
31 Mar 2014, 03:52
Forum: Software Development
Topic: "CursorTask Modification"
Replies: 5
Views: 3956

Re: "CursorTask Modification"

Thank you Juergen,
What I meant was the first case and by following your great comments and adding the Waveplayer objects in the initialization class, now I can get what I need.

Kind regards,
Sam
by darvish_sam
25 Nov 2013, 17:26
Forum: Software Development
Topic: " DataIOFilter Modification"
Replies: 3
Views: 3174

Re: " DataIOFilter Modification"

Thank you Juergen for your very helpful reply. I'll try to modify the source module instead. Just tone more question: As you know some amplifiers like TMSi Refa, do not have built-in filters and so I have added the source filter and re-built the TMSi class. Now as far as visualization concerns it wo...
by darvish_sam
25 Nov 2013, 04:46
Forum: Software Development
Topic: " DataIOFilter Modification"
Replies: 3
Views: 3174

" DataIOFilter Modification"

Dear all, Could possibly someone tell me how to change the DataIOFilter so as to modify the value of each channel before saving? I need it to re-reference EEG Channels as I am recording data using TMSi Amplifier and recording EEG, EMG and EOG concurrently and due to its automatic common average refe...
by darvish_sam
15 Nov 2013, 02:31
Forum: Software Development
Topic: "CursorTask Modification"
Replies: 5
Views: 3956

Re: "CursorTask Modification"

Hi Chad,
Thank you for letting me know. I totally forgot SFN.
Hope to get an answer soon.
Regards,
Sam
by darvish_sam
14 Nov 2013, 01:42
Forum: Software Development
Topic: "CursorTask Modification"
Replies: 5
Views: 3956

Re: "CursorTask Modification"

Dear moderators,
After waiting for few days and getting no response, I wonder if it has been asked at the right place and perhaps should be moved to some other branches like "Application".

I will be very grateful if you could give me a feedback.

Thank you for your help in advance.
Sam
by darvish_sam
03 Nov 2013, 22:17
Forum: Software Development
Topic: "CursorTask Modification"
Replies: 5
Views: 3956

"CursorTask Modification"

Hi Everyone, Could anybody please let me know how to modify the cursorTask application so as it could have a "Ready" auditory command in the beginning of each trial, followed by a "Go" command 2 seconds later? I think I have (sorta) done the first part ("Ready" auditory...
by darvish_sam
01 Nov 2013, 03:45
Forum: Software Development
Topic: " BCI Metronome"
Replies: 4
Views: 3252

Re: " BCI Metronome"

Dear Juergen,
Thank you for the clarification. Now, I totally understand it.

Kind regards,
Sam
by darvish_sam
30 Oct 2013, 04:50
Forum: Software Development
Topic: " BCI Metronome"
Replies: 4
Views: 3252

Re: " BCI Metronome"

Dear Juergen, Thank you for your very prompt response. So, if I am correct, it not windows or BCI2000 other programs that hold the CPU, but it is the amplifier itself which does not allow its buffer features to be updated faster than every 8 ms, regardless of the value of the sampling frequency. I a...
by darvish_sam
28 Oct 2013, 20:00
Forum: Software Development
Topic: " BCI Metronome"
Replies: 4
Views: 3252

" BCI Metronome"

Dear all, I am wondering how BCI2000 manages its timing. In other words. is it only the DataIOFilter that calls the process class of the data acquisition module and then waits for the required time to receive the data from the amplifier's buffer? or there is another metronome that adjusts its timing...
by darvish_sam
26 Sep 2013, 21:33
Forum: Software Development
Topic: " Problem with Commiting the added files to the source code"
Replies: 4
Views: 3416

Re: " Problem with Commiting the added files to the source c

Thank you all for putting time on this issue, As Chad mentioned the problem might be with the files, I tried to copy the files in an external path and got the same error. Even though the downloaded .wav files could be played correctly, I downloaded an application and converted them to .mp3 formnat a...
by darvish_sam
13 Sep 2013, 01:05
Forum: Software Development
Topic: " Problem with Commiting the added files to the source code"
Replies: 4
Views: 3416

Re: " Problem with Commiting the added files to the source c

Hey Sam, how are you? Your account does not allow you to commit files to the online BCI2000 repository. Indeed that honour is restricted to the primary developers (not me). Your best bet is to untrack any files you add. Also, if you plan to change any source code, I'd recommend copying what you nee...
by darvish_sam
12 Sep 2013, 03:49
Forum: Configuration
Topic: Saturated EEG Channels
Replies: 6
Views: 13279

Re: Saturated EEG Channels

Hi, this is Ruud from ANT. The Refa ANT amplifier is a so called DC amplifier. That means that it measures all signals from DC to abour 1/3 of the sampling frequency. There is only a low-pass filter at 0,27*Fs in the amplifier (for anti-aliasing purposes). There is no high-pass filter, which explai...
by darvish_sam
11 Sep 2013, 08:02
Forum: Software Development
Topic: " Problem with Commiting the added files to the source code"
Replies: 4
Views: 3416

" Problem with Commiting the added files to the source code"

Dear all, I recently downloaded the current version of the BCI2000 source code using Turtoise SVN (verion 1.8.1). I also downloaded an external QT for VS2010 64 bit and built the solution, quite error free. The SVN program always allows me to update the source, however, now that I have added two sou...
by darvish_sam
18 Sep 2012, 00:58
Forum: Configuration
Topic: Saturated EEG Channels
Replies: 6
Views: 13279

Re: Saturated EEG Channels

Hi, the problem might be unrelated to BCI2000. Do you get reasonable EEG signals when using the software that came with the amplifier? Large offsets can be due to wrong cabling, or to mixing different electrode materials. Make sure that both the amplifier's reference and ground input are connected ...