Analog Audio OK, DIgital Optical a No-Go

Hello Everyone,

I just bought a new mini from Apple to use as a HTPC. I've been setting up everything and for a few days I was content with everything because I was missing the TOSlink to Mini-TOSlink cable. I could hear sound on the onboard speaker using the mini to left/right audio splitter worked fine. My digital optical cable finally arrived and the first thing I did was plug it into the mini and then into my receiver. I have a Sony SA-WCT100 Sound Bar that has a built in HDMI switcher. I have the mini video out configured with a mini Displayport to HDMI that I bought at Amazon. As you can see, I was ready and pumped to get the mini set up to watch even just podcasts in iTunes.

This is where everything started going downhill. As soon as I plugged in my TOSlink cable, the sound output converted from analog to digital. In system prefs --> sound, the output changed to Digital and the volume bar became grayed out at 100% volume. Basically all the signs were there to let me know it recognized that there was a digital optical cable in. My problem, no red light, no sound.

*I AM NOT GETTING SOUND NO MATTER WHAT!!!*

I pulled the cable out and put it in my MacBook Pro, also early 2009, and I had no issues whatsoever, the red light was there and the audio was streaming out.

I perused the forums and even tried setting up speakers in the Midi setup utility in the Utilities folder in Applications.

Desperate. Any suggestions anyone can make so that I am not forced to return this thing.

Thanks.

MacMini (Early 2009), Mac OS X (10.5.6)

Posted on May 12, 2009 6:34 PM

Reply
12 replies

May 13, 2009 1:11 PM in response to Fr1end

I had the exact same problem on my new Mac mini (2.0 Ghz, 4 GB RAM, 120 GB HD). Sound was fine through a mini-to-RCA analog stereo cable output, but nothing through a Toslink (which I later verified worked fine with my iMac). The sound controls on the mini grayed out and then no sound at all., no matter what corrective action I attempted.

Finally, after much research online, I reset the PRAM, reinstalled the stereo output cable, rebooted a time or two and all was fine.

I'm not sure if this was related to the problem or not. I also upgraded my Elgato EyeTV 3 software to the latest version (v3.1.1). I don't know if you are using EyeTV, but based on various things I've experienced while using it, there seems to be a few quirks between it and the mini, although the EyeTV lite version works perfectly with my iMac.

Jun 5, 2009 6:31 PM in response to Fr1end

Hi everyone,

I don't believe it is possible to convert anolog audio to digital using a Toslink. When plugged in, the Toslink is looking for a power source to power the signal. A toslink can convert a digital signal which is energized w/ a voltage source and that's how you get your red light for Optic.

You can use what is called a Anolog to Digital Converter, which does what you want and is powered by a 5v power supply.

Go to: www.ramelectronics.net/audio-video/audio-converters-extenders/analog-to-digital -digital-to-analog/analog-to-digital-audio-converter-gefen-gtv-aaud-2-digaud/pro dGEF00226.html

or E-bay

to see a common product used for this application, that will work.
Your MacBook Pro is a true digital signal output.

Jun 5, 2009 11:08 PM in response to Fr1end

Satcom5's advice is way off base. Sorry amigo.
The audio ports on the Macs are combo, both analog and digital. The analog is accessible with a standard 3.5 mm mini-plug. The digital audio is accessed with a toslink optical cable with a mini-plug, but it needs to be at least .5 mm longer than the analog min-plug. The extra length allows it to touch the LED which activates the Mac's digital audio, which is recessed so the analog mini-plug does not activate it. So you need to make sure that your toslink's mini-plug is actually longer than an analog mini-plug, because not all of them are.
Something else that I forgot to mention; digital audio sleeps. If there is nothing playing there is no output and the LED goes out. Try playing something in iTunes and then plug in your cable.

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Analog Audio OK, DIgital Optical a No-Go

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