A better choice might be something like Zenfolio (there are lots of these types of services). Some of these services do that processing for you, and also give you a marketplace for people to buy prints / photo books / etc. Source: about 1 year ago

I think Zenfolio https://zenfolio.com is great! You can create a website of your own, as well as have password protected client galleries. It also integrates seamlessly with MPIX and Bay Photo which both have great products! I build websites and it’s so not worth trying to do your own site when you look at the features and the prices and integration of the labs you get with Zenfolio. Source: almost 2 years ago

Not sure it has those specific features but you may want to check out Sound Control. Source: about 1 year ago

SoundControl is exactly this and more: https://staticz.com/soundcontrol/. Source: about 1 year ago

Hey, bro, I think I've found a solution: I installed the SoundControl software, enabled the "Force Soft Volume Control" option. Yay, the volume is now adjustable! Hope this helps you too! Screenshot. Source: about 1 year ago

I haven’t installed it yet, I’ve got a few days off and don’t want to waste the trial period. This is the one I bookmarked from the ones I found: https://staticz.com/soundcontrol/. Source: over 1 year ago

IDK whether a 3rd party software audio mixer would help; you may download a trial here: https://staticz.com/soundcontrol/. Source: over 1 year ago