When I was student at the university, I designed and build a digital volume control by using a 8 bit DAC. It was a cheap Burr Brown chip and the idea was: since in the DAC there were a sort of resistors array properly scaled and powered by an external reference voltage, I replaced this one with the audio line signal. Of course the DAC was not clocked.
Today one of my DAC ( Teac ) seems to use a very similar idea: the rotary volume control has 256 steps and the encoder controls the gain of the output drivers. I am not sure if decimating a digital signal is worst than using analog solutions, but a digital control can be designed even with an analogue approach. Some months later, during the final exam of digital electronics, we had to design and program all the above with a Xilinx, but we are talking about 1993, more or less Unfortunately I am no more into this stuff... so sorry having to deal with budget and economics :-( ------------------------------------------------------------------------ steff's Profile: http://forums.slimdevices.com/member.php?userid=66870 View this thread: http://forums.slimdevices.com/showthread.php?t=108191 _______________________________________________ unix mailing list unix@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/unix
