How to record multiple audio channels in commandline with external soundcard
Hi, for scientific reasons I need to record 8 audio channels simultaniously. The process has to be automated, so I want to run everything from commandline.
The device I'm using is a Presonus Audiobox 1818VSL. Ideally it should feed a RaspberryPi which stores it on a external harddrive. For my porpuse the samplerate doesn't really matter, but the file size should not not be to large. So 16 bit and 4 to 8 kHz would be great.
Up to now I've tried to use arecord with every posssible format, bitsize and samplerate, but nothing worked out so far. Obviously arecord missinterpretes the incoming signal, what results in pretty large and samplerate dependend noise.
Surprisingly everthings fine with the recording via audacity, which excludes the possibility of driver problems or something like that.
Does anybody have an idea how to solve this problem?
Thanks in advance