When to use the Dither

[Jsswtpmp182]

Should you use a Dither on the master fader when bouncing from 24 bit 44.1khz to 16 bit 44.1khz? I guess my main question is do you use a Dither when downsizing bit rate or sample rate, or both? Thanks!

[lemix]

Jsswtpmp182,
do you use a Dither when downsizing bit rate >> YES, and always as the very last step.
For converting sample rate you would use SCR, just before the dither.
hope this helps,
happy tooling,

[JMS40]

According to Digidesign, you also use Dither even when you're dealing with 16 bit sessions:

You should use the Dither Plug-In when mastering to a 16-bit file with the Bounce To Disk command, or when mastering to an external device that records at 16-bit. This is even when using 16-bit sessions.
Even though 16-bit sessions use 16-bit files, they are still being processed internally at a higher bit rate:
-32-bit floating for Pro Tools LE systems.
For this reason, whether you are using a 16-bit session or a 24-bit session, it is reccomended that you use the Dither Plug-In when mastering to 16-bits"

[lemix]

He asked >>
Should you use a Dither on the master fader when bouncing from 24 bit 44.1khz to 16 bit 44.1khz?

[JMS40]

He also asked "I guess my main question is do you use a Dither when downsizing bit rate or sample rate, or both?", and I was just pointing out, as an aside to the topic, an interesting FYI that some may not be aware of.
At least that was my intention.