On Mon, 7 Aug 2017, at 23:41, Rodolfo Medina wrote: > Fascinating...! But now I got very interested in the multi channel audio > interface you suggest... Before looking for one to buy, I'd like to > better > know and understand how it works...
They're just boxes which can have more than two mics (or line-level signals eg from instruments) plugged into them. Inside there's multiple analogue- to-digital converters. The digital data from all of these is then sent along the USB connection to the computer. Some interfaces might send all the channels so they arrive in a single file on the computer, which then contains multiple separate channels, others may directly generate separate files on the computer. It's unimportant which you get because a file containing multiple channels can be split into separate files (with eg sox), or a set of files can be combined (with eg sox). I can't advise you on what to buy... because I suspect you're going to spend a great deal less than I did when I last bought one... That was a Tascam box: http://tascam.com/product/us-2000/ which you'll see can handle 16 separate inputs at once... There's a more recent version of that these days... A box like that is aimed at people used to using professional audio equipment. There will be lower-spec interfaces around too, but you obviously need to find one that's known to work with linux. You also probably don't want one with eg XLR sockets for mics. -- Jeremy Nicoll - my opinions are my own.
