I am a newb here, and I must say I love Arduino! I am a scientist who studies bats and I am trying to build by own "bat detector" which is a device that can record audio frequencies up to 125 kHz (250 ksps). From my research this is not possible with an Arduino, but it does seem possible with other devices, possibly a DE0-Nano, chipKIT Uno32 or NETDUINO. The key is I need to sample and save this data, either streaming onto a laptop or large SD cards. If I could figure this out it would be pretty awesome, as the devices for doing this run between $650 and $1500. But, since I'm a newb I need some help. Does anyone have a suggestion for which microcontroller or FPGA is best suited for this application? Also, is it possible to precisely set the sampling rate when pushing the ADC to such high rates on these devices? Any comments would be much appreciated!