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USB 3D sound card fix
πηγή: http://leeds49.co.uk/2013/12/13/usb-3d-sound-card-fix/
Fixing cheap USB sound card
πηγή: https://www.youtube.com/watch?v=4GNRzwfP7RE
USB soundcard to digital storage oscilloscope
πηγή: http://www.epanorama.net/newepa/2012/05/08/usb-soundcard-to-digital-storage-oscilloscope/
Sound Card DC Input Modification
πηγή: http://www.daqarta.com/dw_ggnn.htm
Virtual 5.1-surround USB 2.0 External Sound Card
πηγή: http://www.amazon.com/Virtual-5-1-surround-External-Sound-Card/product-reviews/B000N35A0Y
Cheap C-Media (?) sound card
πηγή: http://tomeko.net/dsoundscope/c_media.php
http://www.michaelhugo.com/page/8/
πηγή: http://m3h.com/usbfob-119.pdf