Intermittent USB Sound Output

I have an Al Macbook Running Leopard, 10.5.8. I just purchased a Monoprice Mini Displayport Male and USB Male Audio to HDMI Female Converting Adapter
http://www.monoprice.com/products/product.asp?cid=104&cp_id=10428&cs_id=1042802&pid=5969&seq=1&format=2
The goal is to output both video and sound from my computer to my audio receiver’s HDMI input then onto my TV and my surround sound speakers. The first time I set up my system I wasn’t getting any sound thru the USB to my receiver. I then plugged and unplugged the cables multiple times and got the sound to work. I didn’t change any settings in my Preference panel. Last night I hooked my computer back up to the cable and it didn’t output sound. Is there a sure fire method to ensure that my USB port is outputting sound to my HDMI adapter?
One other symptom, when I was getting sound out of my cables, I could close the lid of the computer and still get video and sound out. Last night, when I was using the cables and I tried to shut my lid, the computer went to sleep and I lost all video signals.

Hi, Ulyssesbob ,
welcome
first of all, i don't know about the adapter you are using. but here are a few remarks:
1) closing the lid of the MB means that is has to go to sleep. So the instance you quote, that it continued playing video and music, is not normal. it is normal to stop all activity when you close the lid of the MB.
2) when setting up new connections with sound (and video), the system needs a bit (few seconds) of time to recognize things. Once there are multiple output possibilities, the system can chose by itself the one you would like, but a priori, the MB doesn't know which one is the right one. You should check the Syst.Prefs and set it to the one you need. This also implies: if you disconnect, the MB might change the Syst. Prefs by its own decision, since it will not put output to an nonexisting device...
I would try to reset it up, slowly, and controlling every step you are doing by looking at the system prefs settings. Hope this works out. If you still have problems, or your MB behaves strangely, please report back.
Thomas

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Last edited by kokoko3k (2013-11-11 15:33:41)

Intermittent USB Sound Output

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