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Calculating file sizes

File size is limited by the restraints of the operating system and the available memory space on your hard drive or disk (depending to which you save the file). Software for Windows and MacOS may have different limitations due to system restrictions.

Windows OS

Current release: AcqKnowledge 5.0.2 – 64 bit and Biopac Student Lab 4.1.2 – 32 bit

There are multiple cases (configs) related to the issue of Memory/HardDrive/32bit-64bit limitations

Acq 5.0.2 64-bit offers big improvements in terms of file size and memory limitation

File functions

Memory functions

  1. BSL 4.1.2

File and memory functions are unchanged at 2 GigaSamples of length and 4 GBytes of file size. BSL 4.1.2 can allocate max 2 GBytes of RAM for transformations.

MacOS


Use the following equation to calculate the memory required for your acquisition:

 Memory required (bytes) = [(8C + 2A) x S x T] + 1 MB*

C = Number of calculation channels
A = Number of analog channels
S = Sample rate (samples/second)
T = Recording time (acquisition length)
* 1 MB = memory required to store file information
Journals, events, and other information are variable and will also require more disk space. Once analog channels are filtered or otherwise transformed, the required amount of storage will increase to 8 bytes per sample, identical to calculation channels. It is not possible to perform any transformations for acquisitions where converting analog channels to floating point will exceed 2 GB.

Refer to the software guide available under the program Help menu for setup and analysis guidelines when working with large files.

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