Patrick Dixon;150167 Wrote: > Err, no. The -30db suggestion comes from the fact that the SB has been > carefully designed not to drop any digital resolution until this point.
Careful design really doesn't have much to do with it. It's all about having 8 spare bits. I realized that I wasn't thinking in stereo, so 0.5dB would be 0.25dB/channel. So you could drop the volume much more before you lose bits. Patrick Dixon;150167 Wrote: > This is not correct. You are assuming that drops are in convienient > binary divisions (which of course they aren't). DACs convert numbers into voltages, so every bit does equal 3dB (Actually 3.010...dB). That's why people talk about CDs as having a S/N ratio of 96dB (16 bits x 2 channels x 3dB). If there's anything "carefully designed," it would be that each volume increment corresponded to .0502dB (1/6 of a one-bit drop) rather than precisely 0.5dB. But this would be the easiest way to implement it. Of course at some point you have to worry about the noise level of the circuit between your SB and pre-AMP. But that doesn't have anything to do with the digital attenuation. -- rjplummer ------------------------------------------------------------------------ rjplummer's Profile: http://forums.slimdevices.com/member.php?userid=8192 View this thread: http://forums.slimdevices.com/showthread.php?t=28834 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
