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Media Center 26 volume control doesn't work: USB connect from Mac Mini to amp

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LouisThe:
Thanks Brian: very much appreciate your suggestions: i won't be able to test them until next week, (as relevant equipment has been moved temporarily), but will do so when I can and let you know how it works out.

thanks again

LouisThe:
Hi Brian --and Matt :)

Brian I tried all your suggestions -- nothing worked- I went back to Matt's suggestion of trying internal volume and found that internal volume gave me some volume if I turned volume up as high as it can go. And then only very minimal volume adjustment.

thanks both of you for your efforts- it appears that if I use the USB port to connect my mac mini music  to my external integrated stereo amplifier, then I'll have to use the volume  control on the amplifier and not the more convenient  controls on the computer.

Cheers

Matt:
Internal Volume ranges from full volume to silence.

RoderickGI:
I'm not a Mac guy so Brian can correct me without worrying about hurting my feelings.  ;D

A. The Mac Mini's preferences don't need to choose the Moon USB DSD HD Audio. You just need to set MC to use it in "Options > Audio > Audio Device". MC will only use the system preferences when it is set to play to the default audio device. Otherwise, it plays to the Audio Device it is set to play to, ignoring the System Preferences setting. By all means, set the System Preferences to the Moon USB DSD HD Audio/SimAudio 240i integrated amp when MC isn't running, so it is used at that time.
EDIT: I am assuming that the SimAudio 240i integrated amp presents as Moon USB DSD HD Audio in the Mac preferences, and also in MC. If not, please clarify. But what you want to do is select the SimAudio 240i integrated amp as the output device in MC.
B. Use Internal Volume.
C. Have MC maximize System Volume when playing from MC, so that it doesn't affect Internal Volume's control. "Options > Audio > Audio Device > Device Settings > Maximize device volume during playback".
D. I set the Startup Volume to 80% and the Maximum Volume to 100% in "Options > Audio > Volume". I also set the Internal volume reference level to 80%, which is just my preference.
E. With those settings in place, use the physical volume control on the SimAudio 240i integrated amp to set a comfortable listening level, and thereafter use MC's Internal Volume control.

I would recommend leaving Audio in Exclusive Mode, and just don't run MC at the same time as Apple Music, Safari or Pure Vinyl. Without MC running you will be able to play to the SimAudio 240i integrated amp.


Again, corrections welcome.  8)

LouisThe:
Hi Matt and Roderick:

Thanks for your information.

Matt -- in this set up, internal volume ranged from silence to very little volume: set at the maximum level, using internal volume, the volume was less than 10% of what I was getting if I gave up trying to control volume through MC, and just left it.

Roderick: I'm again on a hiatus from the 240i: I've been "test driving" it: I want to buy it, but I also want to use Media Center with it and so, I get it from the shop for a "test drive" but then have to return after a couple of days. This is all by way of saying, I won't be able to try out your suggestions until I can get the unit back, closer to the end of the month: but I fully expect that I will do that and will then report back.

Thanks again folks: I'm pretty thrilled that there is such great support in this forum. I'll get back to you. Cheers

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