sage Posted March 30, 2013 Share Posted March 30, 2013 For those who care. What is plotted, is NOT the DAC value, but the volume used for square waves. the behaviour of DAC value might be slighly(?) different. Interesting: Maximum volume is 128 (NOT 127). Known: negative values have same output as positive values (aka 1= -1 =255, 127=-127=129). Only 128!=0. Apart from very low values everything looks linear. The "lower nibble" squirk has not been observed. Quote Link to comment Share on other sites More sharing options...
sage Posted March 30, 2013 Author Share Posted March 30, 2013 Small correction: looks like i had not square but integrate mode enabled, i dont think that makes a big diference as the volume was at maximum. nevertheless, i will repeat the measurement for real square waves, This is the reason that 128 (0x80) has maximum volume. In square mode, switching between 0x80 and -0x80=0x80(!) delivers no (continuous) signal output. just a small crack at the start of tone. Quote Link to comment Share on other sites More sharing options...
GadgetUK Posted March 30, 2013 Share Posted March 30, 2013 Thanks, very interesting info! Quote Link to comment Share on other sites More sharing options...
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