files formats

Hello!

Please tell me if this is possible, what format files with the extension <.mcd> and <.c2d>?

another question: is it possible to change the frequency of data recording to reduce the file size?

thanks in advance

Dar Kharkovskaia,

*.mcd is the format of data files recorded by MC_Rack software.
*.c2d is the data format reciorded by Cardio2D software.

For *.mcd files the option of Downsampling exists. You will find this function in the Filter menu.
Please have a look at the MC_Rack manual under "Downsampling"

http://www.multichannelsystems.com/sites/multichannelsystems.com/files/documents/manuals/MC_Rack_Manual.pdf

Page 140ff

Greetings Thomas

Thank you!

So, am i right, that I can change frequency of recording by using only McRack, but in the Cardio2D I can't do this?

We are trying to do some custom postprocessing of our experimental data obtaied with Cardio2D. In order to do this we need an access to the raw experiment data. Basically, the numbers from the electrodes and the time. I've looked into the c2d file and it has quite complicated structure. The are some kind of frames that have the following header:
FPosPrev=162350
FPosPrevID=-1
FPosNext=171050
FPosNextID=445100
TimeStamp=0
<BinaryData>

And then binary data goes. Could u plz advice how to read the data in such a way so that I would end up with just binary values of the kind
<time0,V1,V2,...,V64>
<time1,V1,V2,...,V64>
...
<time_last,V1,V2,...,V64>

I know that we can export this data into .dat format but it is way too large (since it is text) and slow in processing.

Thanks for your help!

Dear Dr. Kharkovskaia,

your assumption is correct. Downsampling is possible in MC Rack - however not in Cardio2D. You can however set the sampling rate to your required value at the initiation of the experiment.

Together with the C2D file there are C2S and C2R files generated. You should be able to access the C2R file with any XML editor. Here you will find all results (Timestamps, amplitudes, FP durations etc).
Filestructure is pretty straightforward.

Greetings

Thomas