earwaxer9;637341 Wrote: > Ok, I may be stretching things a bit! - I'm looking to replace my method > of volume control in my system. Currently using passive, Alps Blue > Velvet with the t-amp. I want to stay passive and relatively cheap! I > thought about passive LDR (optocoupler), autoformer (intact audio), and > a stepped approach. > > Since I'm using a computer, why cant I control the volume in software > without any degradation in resolution etc? I know that my Transporter > has a digital volume control but that does not appear to perform as > well as my Alps pot. Any info would be much appreciated!
So there really isn't any problem with software volume control. This has been discussed in-depth several times in the forums. The fact of the matter here is that the volume control is done in 24bits by software. This means that any mathematical bit errors are in the -130dB to -140dB range. Since the Transporter's analog DAC section is at best -120dB SNR, it can't even reproduce these bit errors. But if you've got the volume turned way down to like 20%, you have lost a lot of signal and are going to be boosting a lot more of the noise floor at the amp. What you really want is to reduce your amp's gain or apply a passive attenuation (simple resistor network) to limit the max volume of your system. http://wiki.slimdevices.com/index.php/DIY_passive_attenuation -- SuperQ ------------------------------------------------------------------------ SuperQ's Profile: http://forums.slimdevices.com/member.php?userid=2139 View this thread: http://forums.slimdevices.com/showthread.php?t=88419 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
