Sampling

All inputs and outputs are synchronously sampled and recorded.
All outputs are recorded with a timestamp
Each analog input has its own AD converter. Thus, a multiplexer is unnecessary and a high sampling rate can be realized.
Sampling occurs continuously. A sample (xadio_record) occupies 64 bytes in memory..
The samples are written in main memory using DMA and are stored in a ring-buffer. The buffer is can be accessed by the user under Linux as a file in the /proc filesystem.
The sampling rate is configurable from 3051 Hz to 195 kHz.