Browsing through the data sheets for some of Burr Brown's digital filters (specifically the DF1706 digital filter and the DSD1608 8 channel 24bit DAC with 8x digital filter, I have samples of both), I see both implement a digital volume control, ranging from 0dB loss to -127dB in 0.5dB steps.
Is this implemented by reducing the no. of bits used for the output? If so, is this equilivant to data loss and reduced dynamic range, with the signal not being able to use the full 24bits output, or is it implemented by a digital potentiometer with its associated distortion.
Any thoughts anyone?
Thanks, Adrian
Is this implemented by reducing the no. of bits used for the output? If so, is this equilivant to data loss and reduced dynamic range, with the signal not being able to use the full 24bits output, or is it implemented by a digital potentiometer with its associated distortion.
Any thoughts anyone?
Thanks, Adrian