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Toslink Issues on iMac

post #1 of 76
Thread Starter 
First off, gotta say I love AVS and Monoprice. The best combo since PB&J!

I've got big problems people. My 20" iMac is not working with me on the surround sound output. I've searched for a few days now and tried many different solutions from manufacturers and public forums with no luck.

My current audio setup is a 20" iMac -> Digital Optical (Toslink) Female / 3.5mm Male -> 25' Optical Toslink 8mm Cable -> Optical Input on an Onkyo TX-SR605.

As soon as I plug in the cable the Mac picks up the link and switches everything to Digital Out. And the Onkyo does a little shuffle between DTS and DD before it settles on PCM. That's all fine and dandy, but I get no audio from the receiver. No system sounds, no music from iTunes, no audio from VLC, no audio from DVD Player. Yes, I did switch the preferences in each program and yes, I did try restarting after every change.

I know it's something I'm not doing because my brother's 24" iMac and MacBook with different cables and adapters are doing the same thing. I've tried adjusting volume levels and preference settings on the Mac, in DVD Player, QuickTime, and VLC. I've also tried just about every format combination in Audio/Midi Setup with no success. And no, it's not my receiver because I've run into the same issue with my brother's MacBook and 3 other receivers.

I've seen this issue on another forum, but there was no solution. My only other option is a USB audio converter or a hella-expensive DAC. Please help!
post #2 of 76
Have you tried removing the toslink cable and plugging in regular headphones? If so, what happens then?
post #3 of 76
Thread Starter 
Hey Further, thanks for the quick response....

I forgot to mention that...yes, my nano headphones and my old JBL bookshelf speakers work like a charm through the same jack. And the internal speakers work fine as well.

One more thing, there is light coming out of the port, plus my receiver is picking up the signal (hence, the switching from PCM to DD/DTS when applicable). So, it's probably not a signal issue.
post #4 of 76
Thread Starter 
...and I'm running Leopard, if that makes a difference
post #5 of 76
Quote:
Originally Posted by watsdm4 View Post

I forgot to mention that...yes, my nano headphones and my old JBL bookshelf speakers work like a charm through the same jack. And the internal speakers work fine as well.

Do the internal speakers work when you have the digital output selected but no cable plugged in?
post #6 of 76
Quote:
And no, it's not my receiver because I've run into the same issue with my brother's MacBook and 3 other receivers.

What exactly does this mean--that your brother can't get his Macbook to work on his receivers either? That you took your Mac over to his place and can't get it work on his receivers? That you tried his Macbook on your Onkyo?

You should realize that usually when someone writes this here, at least 50% of the time, it turns out that it IS the receiver, as in the owner not knowing how to configure it properly, human error, in other words, not assigning or configuring an input properly, not knowing how to switch, etc. As AVRs get more sophisticated, reading the manual becomes even more important. The other 48% it's human error on the Mac side, not understanding what to do or mucking something up. But...maybe 2% actually turns out to be a hardware problem or software bug. I'm a little unclear about what your issue is exactly. When you write this:

Quote:
As soon as I plug in the cable the Mac picks up the link and switches everything to Digital Out. And the Onkyo does a little shuffle between DTS and DD before it settles on PCM.

I don't have that Onkyo, but the way my HK AVRs work when I select an audio input is not like this, as in there's no shuffling before I select the type of audio--there's no expectation of what it's gonna receive and no default--it doesn't "settle" on anything--it waits, pulses actually, until I decide to play iTunes (then it will light up and lock on PCM) or for me to select a 5.1 surround track within Apple dvd player (then it will light up and lock on DD.) So not having the 605 I'm at a disadvantage, but is this shuffling normal for all inputs and sources? Does it settle on something before you actually decide what to send?

Quote:
there is light coming out of the port, plus my receiver is picking up the signal (hence, the switching from PCM to DD/DTS when applicable)

or is this what you mean--that your receiver only shuffles and then locks onto PCM or DD/DTS when you make that selection in your Mac software player?

Also, I'm not sure what you're trying to say here:

Quote:
I know it's something I'm not doing because my brother's 24" iMac and MacBook with different cables and adapters are doing the same thing.

doing what same thing?

are you saying that your brother ALSO cannot get any sound out of his Macs to his AVR? or are you saying that trying to connect HIS Macbook to your Onkyo ALSO does not work? between you and your brother, what combo of devices (mac + cables + avr) IS working?

It also seems to me you have messed around with plenty of settings on the Mac side, you've done your homework about preferences--for the time being, leave that alone. Let's try to figure out what you think you've ruled in or out hardware-wise. So clarify this:

Quote:
And no, it's not my receiver because I've run into the same issue with my brother's MacBook and 3 other receivers.

and this

Quote:
I know it's something I'm not doing because my brother's 24" iMac and MacBook with different cables and adapters are doing the same thing.

and maybe we can get a better idea how to troubleshoot.

Two other questions:

What exactly are you using for this:

Quote:
Digital Optical (Toslink) Female / 3.5mm Male -> 25' Optical Toslink 8mm Cable

And, is your AVR properly recognizing any digital audio inputs from any other devices, a la a cable STB or a dvd player?
post #7 of 76
Thread Starter 
Quote:
Originally Posted by Further View Post

Do the internal speakers work when you have the digital output selected but no cable plugged in?

No, once I put in the Toslink adapter the internals cut off and the light starts-a-shining.
post #8 of 76
Quote:
Originally Posted by watsdm4 View Post

No, once I put in the Toslink adapter the internals cut off and the light starts-a-shining.

That's not what I asked. When you have digital output selected and no Toslink cable connected, do the internal speaks still play?
post #9 of 76
Thread Starter 
Hey chefklc,
Let's see if I can get all your answers down in one shot.

Quote:


What exactly does this mean--that your brother can't get his Macbook to work on his receivers either? That you took your Mac over to his place and can't get it work on his receivers? That you tried his Macbook on your Onkyo?

Yes, yes, and yes. My brother has a Sony STR-DG1000 and my neighbor has a Denon AVR-2807. All three receivers indicate that a signal is coming through because whenever I play a movie through DVD or VLC the DD/DTS will pop-up on the receiver. iTunes gives me PCM.

Quote:


You should realize that usually when someone writes this here, at least 50% of the time, it turns out that it IS the receiver, as in the owner not knowing how to configure it properly, human error, in other words, not assigning or configuring an input properly, not knowing how to switch, etc. As AVRs get more sophisticated, reading the manual becomes even more important. The other 48% it's human error on the Mac side, not understanding what to do or mucking something up. But...maybe 2% actually turns out to be a hardware problem or software bug.

I understand that I made a fairly bold statement. But, I truly believe that I've exhausted all avenues pointing towards a hardware malfunction. Many people believe that ignorance is a crutch that will steady them through their lives. I'm not "many people".

Quote:


I don't have that Onkyo, but the way my HK AVRs work when I select an audio input is not like this, as in there's no shuffling before I select the type of audio--there's no expectation of what it's gonna receive and no default--it doesn't "settle" on anything--it waits, pulses actually, until I decide to play iTunes (then it will light up and lock on PCM) or for me to select a 5.1 surround track within Apple dvd player (then it will light up and lock on DD.) So not having the 605 I'm at a disadvantage, but is this shuffling normal for all inputs and sources? Does it settle on something before you actually decide what to send?

or is this what you mean--that your receiver only shuffles and then locks onto PCM or DD/DTS when you make that selection in your Mac software player?

Heh, that did sound a bit confusing. My 605 is the only receiver that did this "cycling" of data types. It does this with my XBox 360 and DTV receiver as well. The other receivers came up with PCM until the proper application launched to utilize the DD or DTS.

Quote:


are you saying that your brother ALSO cannot get any sound out of his Macs to his AVR? or are you saying that trying to connect HIS Macbook to your Onkyo ALSO does not work? between you and your brother, what combo of devices (mac + cables + avr) IS working?

Yes, yes, and nothing has been successful thus far. As far as I can tell, the digital audio out of the Mac is an urban legend I spent an entire weekend testing each combination on all three receivers with no luck. It was the same issue across the board; there is signal being sent through the cables, but no audio.

Quote:


It also seems to me you have messed around with plenty of settings on the Mac side, you've done your homework about preferences--for the time being, leave that alone. Let's try to figure out what you think you've ruled in or out hardware-wise. So clarify this...and maybe we can get a better idea how to troubleshoot.

I hope I clarified the situation in the above responses. But, just in case something was missed...
There are 3 Macs and 3 AVRs. All Macs have Leopard and the latests updates. All AVRs are capable of encoding/decoding digital signals. When a mini-Toslink is inserted into the headphone jack the Macs immediately recognize the adapter and switch the audio settings to Digital Out. When the cable is inserted into the adapter and connected to the receiver, the receivers recognize the signal (to my knowledge) by a display response. However, regardless of the application, there is no audio output via the optical link.

Quote:


Two other questions:

What exactly are you using for this...

And, is your AVR properly recognizing any digital audio inputs from any other devices, a la a cable STB or a dvd player?

Not sure I understand the first question. If you're asking about the cable brands, then I'm using all Monoprice cables and adapters. My brother is using Monster and PureAV cables with a Belkin adapter. And my neighbor's cables are...from Best Buy?

If you're asking what this project is for, then I say, "For a HTPC, of course!" I would thoroughly enjoy the opportunity of using my beautiful Mac on a 61" Sammy.

As for the last question, yes. I've tested these cables against my XBox 360, PS2, Karaoke, DTV receiver, and the Sammy. All cables are working flawlessly. The only thing I couldn't test was the Monoprice mini-Toslink adapter. But, that theory is blown out of the window with the Belkin adapter we just purchased.


If any part of this post is flat out wrong, please feel free to correct me. But remember, flamers are lamers!
post #10 of 76
Thread Starter 
Quote:
Originally Posted by Further View Post

That's not what I asked. When you have digital output selected and no Toslink cable connected, do the internal speaks still play?

Musta misunderstood. Digital output is only selectable when the Toslink cable is connected in both System Preferences and Audio/Midi Setup. Otherwise, the default switches to Internal Speakers for Built-In Output. And Headphones when external analogs are connected.
post #11 of 76
it makes a difference on my mac book pro but at the bottom of i-tunes on the right
hand side there is a selection for sound computer external speakers and optic which
i renamed hi-fi if i have it set to computer or external sp no sound will go to hi-fi via
optic you may have already tried this but if not give it a shot.
post #12 of 76
Thread Starter 
Where exactly do you see that option in iTunes? I'm sitting right in front of it now with the cable plugged in and there is no option for speaker selection.

BTW, I'm using iTunes 7.5
post #13 of 76
A couple observations:

1) Just because an optical cable passes light, and the AVR recognizes something is passing through doesn't mean you have a clean signal path from point A -> B.

On my MacBook to Yamaha AVR, I often have a problem where when I make the optical connection (I don't always have the MacBook hooked up to my HT), that the AVR recognizes it, but no sound comes out. I have to turn the AVR off and then back on, and then I get sound. Go figure. I have accepted it as a gremlin in my Yamaha.

2) It seems odd that three people, three Macs and three receivers (or some combo of numbers like that) all have the same problem. As I know that passing digital audio out of a Mac to an AVR isn't an urban myth, and that if most people who attempt this succeed, then there must be something else at play.

My gut sense is that the three of you have somehow shared some information about how to configure the Macs and/or AVR's that is throwing the whole equation off. In a pure vanilla state, taking an off the shelf MacBook, an off the shelf quality AVR, and plugging in a good optical cable between them, they should just work without any special configurations (people moving to Mac from PC may look at this and go: "huh, but on my PC, I had to do steps a, b, c, and then config d-f, before I tried to do x, y, and z to get it to work"). Now if the AVR has undergone some twiddling before trying this, or the Mac has had app and sys prefs tweaked, then there may be some problems introduced.

I would suggest reverting the Mac to a vanilla state for a test. Not knowing how the Onkyo can be setup, I don't know how I would do this. But I know that my Yamaha has a variety of settings for how to deal with digital audio, and if I go into its menuing system and make a wrong choice, then all bets are off.

3)
Quote:


The only thing I couldn't test was the Monoprice mini-Toslink adapter. But, that theory is blown out of the window with the Belkin adapter we just purchased.

What Belkin adapter? Are you saying that you swapped the Monoprice adapter for a Belkin adapter and tested it to the same results?

I have both a Monoprice one-piece optical cable with the mini-toslink and toslink adapters built in, and a regular Monoprice optical cable, and the mini toslink/toslink adapter. Both setups work fine for me.

I wouldn't go so far as to say that if an optical cable works in one place, then it will work in all places. Nor would I say that if all else works, then the one piece of untested equipment (the adapter) is at fault. But it still is a possibility that having an adapter in your optical path may cause a problem for the Onkyo and other receivers. Try a one piece optical cabling setup.

How are the other people and their Macs/AVR's hooking their equipment together? Same kind of optical setup? Or are you just sharing the same cable setup around?


Just some thoughts to help sort this all out.
post #14 of 76
OK, I just read your response, thanks for taking this seriously and appreciating that we're trying to help. Initially, I was pretty sure your problem was the HDMI Audio Out=On/Off setting on your 605 which has tripped other people up here.

But, three Macs with built-in digital audio out, 3 different modern AVRs, diligently tested in various combinations with different sets of optical cables and minijack adaptor tips--cables that you know work--and you can't get any audio out from any program: that pretty much rules out 1) simple AVR configuration errors, 2) a bad cable and 3) an AVR hardware problem.

The odds of all 3 Macs being defective (or damaged) in the same way and all 3 AVRs being mis-configured in the same way seem very very slim.

If the problem was just with one of the 3 Macs, or just connecting to one of the 3 AVRs, it would probably be easier to isolate and solve. I can imagine a situation where the optical out minijack might be flaky in a single Mac, pass light through the cable, and even pass the stream info to the AVR so it recognizes that PCM or AC3 is coming--but then somehow not actually pass the audio. I have a hard time imagining that happening to the 3 Macs in your little focus group.

So, given what you've clarified, I think you have to approach this as a Mac software/configuration problem--and that it likely isn't something specific to one program, like iTunes. (I realize it's a stretch--but perhaps you and your brother screwed up your systems similarly--since you and he are the one other thing you all have in common.) No matter how you had iTunes configured for whatever external Airtunes speaker options (what oztech night be talking about), you should still be getting sound out with Apple dvd player or VLC when you open those programs--and set in preferences which output to use.

The thing is, you're not getting any AVR to detect anything. From 3 different Macs. Quite odd.

iTunes should just work even if digital surround passthrough is messed up. Apple dvd player you have to select "digital out-built-in output" in its preferences. Sound output in System preferences should also be "digital out-built-in output." You know this, just check.

So, open Sound preferences, leave it open, also open AudioMIDI and leave it open, and start describing what you have checked there. Limit yourself to iTunes and Apple dvd player for the time being.

With AudioMIDI and iTunes open, if everything is still working right, MIDI should default to Built-in Output, Audio Output "Source" should say digital out, "Format" 44.1 and 2 ch/24 bit. iTunes app volume control should be 100%, the volume control within AudioMIDI should be grayed out, as in unaccessible. Doublecheck this--start playing a song--if I'm following you--your AVR detects PCM, but you don't hear anything? At this point, cycle through a couple of listening modes for that optical input on your AVR--verify no sound for all. (Often, an AVR will get stuck on one "mode" and need to be sort of jump-started to re-recognize there's a digital device connected.)

Then quit iTunes and open Apple dvd player. Start playing a dvd with DD/DTS--what changes in MIDI? Has it automatically switched over to 48kHz and "encoded digital audio?" Has your MIDI output switched from Built-in Output to "unknown device?" Is your AVR switching from PCM to DD? Cycle through the different listening modes again--still no sound?

When you quite dvd player, does MIDI go back to 44.1?

Have you downloaded and installed any plugins or codecs, mucked with Quicktime extensions, Perian, Flip4Mac, Sapphire, anything like that? Do you have your Leopard install disc? What kind of upgrade did you do? Are you still under warranty? Don't rule out a trip to the genius bar for this, or a complete reinstall of Leopard on one of the Macs.
post #15 of 76
Thread Starter 
eh wildrock, appreciate the observations
  1. tried the power cycling/mode switch on the AVRs, no good
  2. you're probably right, the only connection that's fubar in this experiment is me and my settings...i'm trying to get in touch with a local buddy to see if his "vanilla" setup will do the trick
  3. i picked up a Belkin mini-Toslink adapter because i thought the monoprice adapter might be faulty...i haven't tried the mini-Toslink to Toslink cable yet...know anywhere i can pick one up on a sunday?
post #16 of 76
Thread Starter 
Gotta love the thorough check-downs chefklc,

Quote:
Originally Posted by chefklc View Post

The odds of all 3 Macs being defective (or damaged) in the same way and all 3 AVRs being mis-configured in the same way seem very very slim.

My brother and I have pretty much share our Mac experiences, so the chances of identical problems for us increases by about double.

Quote:
Originally Posted by chefklc View Post

I realize it's a stretch--but perhaps you and your brother screwed up your systems similarly--since you and he are the one other thing you all have in common.

I wouldn't put it past us

Quote:
Originally Posted by chefklc View Post

The thing is, you're not getting any AVR to detect anything. From 3 different Macs. Quite odd.

Misquote there. I my previous post I stated that the AVRs are detecting the signal and switching from PCM to DD to DTS when applicable. I can tell by the AVRs display changes when running iTunes as opposed to a movie in DVD player.

Quote:
Originally Posted by chefklc View Post

iTunes should just work even if digital surround passthrough is messed up. Apple dvd player you have to select "digital out-built-in output" in its preferences. Sound output in System preferences should also be "digital out-built-in output." You know this, just check.

check

Quote:
Originally Posted by chefklc View Post

With AudioMIDI and iTunes open, if everything is still working right, MIDI should default to Built-in Output, Audio Output "Source" should say digital out, "Format" 44.1 and 2 ch/24 bit. iTunes app volume control should be 100%, the volume control within AudioMIDI should be grayed out, as in unaccessible.

check, check, check, and check

Quote:
Originally Posted by chefklc View Post

Doublecheck this--start playing a song--if I'm following you--your AVR detects PCM, but you don't hear anything?

does a bear take a dump in the woods and use a rabbit for toilet paper?

Quote:
Originally Posted by chefklc View Post

At this point, cycle through a couple of listening modes for that optical input on your AVR--verify no sound for all. (Often, an AVR will get stuck on one "mode" and need to be sort of jump-started to re-recognize there's a digital device connected.)

check

Quote:
Originally Posted by chefklc View Post

Then quit iTunes and open Apple dvd player. Start playing a dvd with DD/DTS--what changes in MIDI? Has it automatically switched over to 48kHz and "encoded digital audio?" Has your MIDI output switched from Built-in Output to "unknown device?" Is your AVR switching from PCM to DD? Cycle through the different listening modes again--still no sound?

A buncha things, yes, yes, yes (Aladdin DVD is the test subject), and yes there is no sound. Wow it's like you're sitting in my living room.

Quote:
Originally Posted by chefklc View Post

When you quite dvd player, does MIDI go back to 44.1?

Yup, and 2ch-24bit with the Built-in Output

Quote:
Originally Posted by chefklc View Post

Have you downloaded and installed any plugins or codecs, mucked with Quicktime extensions, Perian, Flip4Mac, Sapphire, anything like that? Do you have your Leopard install disc? What kind of upgrade did you do? Are you still under warranty? Don't rule out a trip to the genius bar for this, or a complete reinstall of Leopard on one of the Macs.

Yes, yes, Tiger to Leopard from the disk, probably. I'm heading over there in about an hour or two. And I'm half-way tempted to blow away my machine just to get this thing solved.

Appreciate the walkthrough. FYI, I just tried to reset my disk permissions to see if that helps...it doesn't. The guy with the vanilla MacBook is supposed to be stopping by later (clean = no plugins, fresh install of Leopard). I'll be sure to post my findings when he gets here and after the visit to the geniuses.
post #17 of 76
Quote:
i haven't tried the mini-Toslink to Toslink cable yet...know anywhere i can pick one up on a sunday?

I don't know where you can pick one up. Unless you have an Apple shop around that carries one, you'll probably have to order one. I'd follow through chefklc's troubleshooting logic first. Besides, what else do you have to do on a wintery Sunday afternoon, but watch football, if you're into that kind of thing.

Quote:
My brother and I have pretty much share our Mac experiences, so the chances of identical problems for us increases by about double.

Don't take this personally , but I had a friend whose father said that when he and his brother got together, that two half brains didn' t add up to one whole brain. They multiplied to a quarter brain... That's not necessarily a bad thing--the Magliozzi brothers got rich and famous off of that sort of thing.
post #18 of 76
Quote:
Wow it's like you're sitting in my living room.

It's because many of us who have been around here for a while have been through this process twice: first with the G4 mini, which Apple saw fit to release with just an analog minijack, and which we struggled to get DD/DTS audio passed through assorted USB and firewire DACs and second with EyeTV in general, which has always posed big digital audio problems.

Short of reinstalling Leopard on your Mac, what you could do in the meantime is install a new copy of Leopard from the install disc on an external firewire drive, then boot from that volume and re-test. It won't have the iLife '06 or '08 apps, but will have iTunes and Apple dvdplayer, which is all you need.

(I've only seen those "optical minijack on one end" cables online, never in stores. I actually prefer using the adaptor tips with regular cables, every one I have tried, even the cheap RadioShack ones, work perfectly for me.)
post #19 of 76
weird, i use my mac book (running leopard) with my onkyo 805 over an optical cable all the time.
forgive me if you mentioned this, but why are you using two cables instead of just one?
Quote:
My current audio setup is a 20" iMac -> Digital Optical (Toslink) Female / 3.5mm Male -> 25' Optical Toslink 8mm Cable -> Optical Input on an Onkyo TX-SR605.

i'm running a regular toslink cable with an adapter into the macbook. works with no configuration on the mac or receiver, other than choosing the correct input on the 805.
post #20 of 76
Thread Starter 
hey elvisizer,
"Digital Optical (Toslink) Female / 3.5mm Male -> 25' Optical Toslink 8mm Cable" = adapter + cable

i could see where the problem would lie if i was trying to make a male-to-male connection...that would be wrong on so many levels

for more clarification:
iMac -> adapter in headphone jack -> cable in adapter -> cable in receiver
post #21 of 76
Quote:
Originally Posted by watsdm4 View Post

Where exactly do you see that option in iTunes? I'm sitting right in front of it now with the cable plugged in and there is no option for speaker selection.

BTW, I'm using iTunes 7.5

the bottom right hand corner next to burn dischttp://www.avsforum.com/avs-vb/attachment.php?attachmentid=98335&stc=1&d=1199669869
LL
post #22 of 76
post #23 of 76
oztech, are you using an AirportExpress? That menu will only show up if you are. We are connecting our Macs directly to our AVR's via an optical cable.

BTW, to help the OP, here is a picture of my Audio MIDI Setup app. Is everything set up the way it is on yours? Mine is working great to my Pioneer AVR.



Here is the Sounds Pref. when the optical cable is plugged in.

post #24 of 76
Thread Starter 
I don't have the speaker selection in iTunes, but my Audio/MIDI looks exactly like that. Thanks for the screenshots people.
post #25 of 76
Thread Starter 
...and the geniuses have spoken

During my visit to the Mac store, I received a little lesson on optical signal strength. Due to the critical nature of data transfer over light and the lack of error connection within the cables themselves, the maximum theoretical length of an optical cable is a bit over 50 feet. The optimal length of an optical cable is around 33 feet.

Given that we are using a mini-Toslink adapter at one of the terminating ends, the effective length decreases in direct correlation to the quality of the adapter. But if that wasn't enough. To have optimal signal strength there must be little-to-no bends to interrupt the signals. And that's not taking into account any external signal interference.

Apparently, the genius believes that the cause of my audio loss is because of settings in my Macs and limitations on my 25' and 12' optical cables. The genius suggested that I go for the Optical-to-Analog converter because there is more mercy for error.

Guess he was right. The vanilla MacBook just came in and all of my 3 and 6 foot cables with the Monoprice adapter work like a charm. The 12 foot cables occasionally drop during DD/DTS transmission. And the 25 footer completely craps out.

My task for the week is returning the optical cables, going analog, and restoring my Leopard default settings unless anyone here has an alternative.

I appreciate everyone's advice today!
post #26 of 76
Actually, Rickeo, with typical iTunes content (either AAC or Apple lossless) you shouldn't be set to 48kHz--but 44.1. You're un-necessarily resampling iTunes/PCM to 48 if you leave it like that, and that'll lessen fidelity--so manually set that back to 44.1 16 bit or 44.1 24 bit. (With Leopard and iTunes 7.5 that sometimes gets stuck and you have to manually switch it back...) So check MIDI to verify it's toggling back to 44.1 after the AC3 of a dvd or VIDEO_TS.
post #27 of 76
Quote:


Guess he was right.

I'm not so sure.

Quote:


The genius suggested that I go for the Optical-to-Analog converter because there is more mercy for error.

Going "analog" isn't a solution, you won't get DD 5.1/DTS that way. There's no reason not to go digital.

Quote:


The vanilla MacBook just came in and all of my 3 and 6 foot cables with the Monoprice adapter work like a charm. The 12 foot cables occasionally drop during DD/DTS transmission. And the 25 footer completely craps out.

Good, that's encouraging. You got a Mac to work--you had tried those cables yourself--so you now know you installed a few third party things too many...

Quote:


My task for the week is returning the optical cables, going analog, and restoring my Leopard default settings unless anyone here has an alternative.

Again, no reason to go analog...none of us do.
post #28 of 76
Quote:
Originally Posted by chefklc View Post

Actually, Rickeo, with typical iTunes content (either AAC or Apple lossless) you shouldn't be set to 48kHz--but 44.1. You're un-necessarily resampling iTunes/PCM to 48 if you leave it like that, and that'll lessen fidelity--so manually set that back to 44.1 16 bit or 44.1 24 bit. (With Leopard and iTunes 7.5 that sometimes gets stuck and you have to manually switch it back...) So check MIDI to verify it's toggling back to 44.1 after the AC3 of a dvd or VIDEO_TS.

O I know, I was actually just using it for AC3 playback, and I dont even have iTunes open. All my music is in 44/16 Apple Lossless and i switch it manually. Thanks for pointing that out though.
post #29 of 76
watsdm4, it seems the obvious solution is to just use a shorter cable, no? Is that going to be a constraint? My six foot cable with adapter on one end (for the iMac) works perfectly fine.
post #30 of 76
Thread Starter 
Quote:
Originally Posted by Rickeo View Post

watsdm4, it seems the obvious solution is to just use a shorter cable, no? Is that going to be a constraint? My six foot cable with adapter on one end (for the iMac) works perfectly fine.

no can do, my mac sits in the office in the next room about 25' away from the receiver
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