Number of Digital Audio Channels?

How many channels of uncompressed output audio does the Mac Pro's digital audio output port support?
I need to be able to monitor 5 uncompressed channels from Final Cut Pro or Soundtrack.
Thanks
Rick

I wrote to Kevin McAuliffe about this:
Hi Kevin,
Thanks so much for your article " Surround Sound Mixing in Soundtrack Pro 2"
I know you will get a million questions like this but why don't I have 5.1
selection in Audio Midi Setup. It's there but grayed out. I use the digital
optical output from my Quad 2.5 MHz G5 to my 5.1 Receiver.
What do I need?
He wrote back (edited):
The Optical out on the G5 will do you no good. You will either need an A/V capture card (like the Kona 3, which is expensive @ around $4500), or you can go with a cheaper option, which is the FA-101 FireWire Audio Capture device from Roland, that you can setup to monitor in surround sound. I'm not sure where you are located out of, but if you are looking for a reseller, you can contact Bert Silva @ On The Go Technologies ( [email protected] / 416-669-7979), and he can help you with anything you might need. Thanks.
KPM

Similar Messages

How Do I Change The Number Of Default Audio Channels for Log & Capture

We just upgraded from FCS 1 to FCS 2. And, at the same time we upgraded from Kona II le cards to Kona IIIs. Here's the problem: we work almost exclusively with digital-based video formats where the audio is encoded into the video signal. Something with this new set-up appears to be causing FCP to "assume" that there are 16 audio channels coming into the project (I'm guessing because the Kona set-up offers "16 channel embedded audio" as the only embedded format). Worse, there doesn't appear to be any way to tell FCP to change the default. In fact, the only apparent way to change the number of tracks being ingested is to go in and manually turn off all 14 of the unwanted audio tracks. It gets to be VERY time consuming. There's got to be an easier way of resetting the default tracks.
Anybody have any ideas?
Tim Walton
KVIE Public Television

Thanks for the responses, guys. I guess I wasn't really all that clear. Something to do with FCP 6 and the Kona III card is telling FCP to set up each project with 16 channels of audio - and ONLY 16 channels of audio. Anywhere that there is a drop-down or check box, the drop-down or check box is either grayed out or only provides choices centered around 16 channels of audio. So, for example, let's say I go to the "Capture Presets" tab under "Audio/Video Settings" and click on "Edit" to modify the current preset. Under "QuickTime Audio Settings," I select "AJA Kona" as my device. Then, under the "Format" drop-down, I have four possible audio formats to choose from - ALL of them showing 16 channels (e.g. - "48.000 khz 24-bit 16-channel"). Nowhere is there an option of selecting, say "48.000 khz 24-bit 2-channel." Everything under every tab specifies 16-channel. So, as a result, I can't tell it to disable the fourteen tracks that I'll NEVER use. I even tried starting with the "Generic" settings tab, used to create your own presets, and even that would ONLY allow me 16-channels - and I couldn't over-ride it!
So far, the only way I've found to work around this is to manually go in and turn off the little green nodes indicating which audio track(s) you don't want to capture. The problem is, every time I have to do this, I'm manually turning of FOURTEEN audio channels.
Hope this helps clarify...
Tim Walton
KVIE Public Television

How do I reduce the number of audio channels in the source or export settings?

I'. trying to export my finished edit through the "movie" setting but keep getting the message that the number of audio channels to create in the exported file must be equal to, or less than the number of channels in the source. Reduce the number of audio channels in the source. Reduce the number of audio channels in the export settings. I am at a loss as to what this means and how I proceed with it prior to putting it to DVD. Please advise.
JWooley

What is your source, sequence settings and export setting. Which version of PP?
Prefebly a screendump of the export settings box.
(e.g. trying to export a mono track to 5.1)

Multi-channel digital audio HDMI with Onkyo pre-pro

Trying to get the HDMI to play nice with my home theatre pre-processor, an Onkyo Pro PR-SC886. so far:
1. I am setting the Sound Pref Output to the Onkyo, which it sees.
2. Setting the Midi Pref to HDMI/Onkyo which it sees.
3. I would like to get a digital stream to the Onkyo which it can convert to Dolby Pro Logic II which is my preferred choice for stereo music. So far, I can only get Stereo which the Onkyo will not convert.
4. In the Midi Pref, I have selected 192Hz/24-8channel output and the speakers are set to 5.1. Everything seems to work there.
5. I was hoping to use the "Encoded Digital Audio" choice, but get no sound when I use it.
Is this an Onkyo problem and are others able to use the Encoded Digital Audio setting with another brand of pre-pro/receiver? Or is this choice used for something else?
Thanks for any insight.
Peter

It seems that Onkyo's HDMI components don't like the HDMI output from computers. There have been several threads in this forum and others where Onkyo owners report issues.
But do try the instructions listed here to see if it makes a difference...
http://www.cod3r.com/2008/02/the-correct-way-to-enable-ac3-passthrough-with-quic ktime/
An alternative media player option is VLC. And you need to turn on the SPDIF option in the audio preferences of this app.

HT5958 Audio prevents relinking to original media -- can I manually change the number of audio channels for a video clip?

I recently updated to Final Cut X 10.1. I had a project for which I was heavily editing the audio, so I was using the "detach audio" feature and in some cases deleting the audio track. Now, when I try to go into the timeline and relink the movie files (which weren't linked automatically after update), the original media won't relink because "the original file didn't have audio, but the new file does."
Is there anyway to edit the misreferenced file so it beleives it has an audio track?
Thank you for any and all suggestions. I really don't want to start this edit over from scratch.
Ben

Thanks for the responses, guys. I guess I wasn't really all that clear. Something to do with FCP 6 and the Kona III card is telling FCP to set up each project with 16 channels of audio - and ONLY 16 channels of audio. Anywhere that there is a drop-down or check box, the drop-down or check box is either grayed out or only provides choices centered around 16 channels of audio. So, for example, let's say I go to the "Capture Presets" tab under "Audio/Video Settings" and click on "Edit" to modify the current preset. Under "QuickTime Audio Settings," I select "AJA Kona" as my device. Then, under the "Format" drop-down, I have four possible audio formats to choose from - ALL of them showing 16 channels (e.g. - "48.000 khz 24-bit 16-channel"). Nowhere is there an option of selecting, say "48.000 khz 24-bit 2-channel." Everything under every tab specifies 16-channel. So, as a result, I can't tell it to disable the fourteen tracks that I'll NEVER use. I even tried starting with the "Generic" settings tab, used to create your own presets, and even that would ONLY allow me 16-channels - and I couldn't over-ride it!
So far, the only way I've found to work around this is to manually go in and turn off the little green nodes indicating which audio track(s) you don't want to capture. The problem is, every time I have to do this, I'm manually turning of FOURTEEN audio channels.
Hope this helps clarify...
Tim Walton
KVIE Public Television

When I merge clips the number of audio channels double

I have a .mov file from my 5diii that has stereo audio and a .wav mono file from my audio recorder.
When I drag a clip into a bin (for sorting) it merges the clip.
That merged clip now has 6 audio channels instead of 3.
It also happens if I select them and just choose merge from the menu.
Anyone know what's going on with this?

Simply dragging a clip to a bin shouldn't be merging anything. I've never heard of that behavior, and suspect some observer error on that one.
Do you intend to use the original camera audio?

I recently (Jan 2012) acquired a MacBook Pro (MBP) running 10.7.4 and an AirPort Express. I also have an old PPC G4 tower (Digital Audio model) running 10.4.11. The OS software on both machines is totally up to date. AirPort Utility on the G4 is 5.4.2

I recently (Jan 2012) acquired a MacBook Pro (MBP) running 10.7.4 and an AirPort Express. I also have an old PPC G4 tower (Digital Audio model) running 10.4.11. The OS software on both machines is totally up to date. AirPort Utility on the G4 is 5.4.2 and on 6.0 on the MBP. I bought a used AirPort card for the G4, I believe it is 802.11b compatible, and the wireless data rate is specified at 11 Mbps. Being a newbie to wireless, it took me many days to get these two machines to link up. This network is not connected to the internet, and there no other networks in the vicinity.
My last problem to solve is the very slow file transfer speeds between the two machines. The transfer time seems to vary depending on which machine I use to initiate the transfer, and which direction the transfer is going. For example: If I initiate the transfer from the G4 and send a 5.4MB file to the MBP it takes 1:32 (min:sec), while the same file going from the MBP to the G4 takes 27 seconds. On the other hand if the transfer is initiated on the MBP, going from the MBP to the G4 takes 2:56, while going from the G4 to the MBP takes 1:59. I realize that these times are not actual wireless transfer times but includes the entire transfer process.
Both machines and the AirPort Express are within a 4-foot radius. Both machines are set to radio channel 2. The AirPort Express is set for 802.11n(802.11b/g compatible) with WPA/WPA2 Personal wireless security.
Any help would be appreciated.
CEU2

BDAqua,
Thanks for the response.
Apple has used the term "Digital Audio" to identify this machine. System Profiler has the following information:
Machine Name:          Power Mac G4
Machine Model:          PowerMac3,5
CPU Type:          PowerPC G4 (2.1)
Number Of CPUs:          1
CPU Speed:          800 MHz
L2 Cache (per CPU):          256 KB
Memory:          768 MB
Bus Speed:          133 MHz
Boot ROM Version:          4.3.3f2
Serial Number:          XBxxxxxMK9
Sales Order Number:
Yes, I could connect them by ethernet if all I wanted to do was transfer files, but I would like to network them so I could use wireless internet. The machines are not always so close together, I did that to simplify the testing. With the very slow transfer speeds I am reluctant to move ahead with the internet step.
<Edited By Host>

Digital Audio w/Logitech Z-5500

Try as I might, I can't seem to get any digital audio out of the Mac Mini to my Logitech Z-5500 speaker system. I don't have the same problem with analog audio, just digital. It is my understanding that the combination of digital out directly from the Mini and the decoding built-in the Logitech should work ... maybe I am being a bit optimistic.
My current configuration is that I have the Mini connected directly to the Z-5500 control panel with a TOSLINK cable with the appropriate 3.5 mm adapter which I got from the Apple Store.
Here's what I tried so far with no success:
o Played several store-purchased DVDs, with known Digital Dolby and/or DTS audio tracks via Apple's DVD Player. I have also verified that the DVD Player was configured to use the "Digital Out - Built-in Output" setting for Audio output. The Z-5500 control panel shows a "No Digital Data" message. (To verify that the DVDs were good, I also played them from a Vista PC that was connected to the same Z-5500 speakers -- no problem.)
o Played music/movie sources from iTunes, knowing that I would be exercising QuickTime for audio output. Knowing that QT doesn't support digital natively, I have installed Perian. Within Perian, I have tried all the Audio Output options (Stereo, Dolby Pro Logic, Dolby Pro Logic II, & Multi-Channel). Still getting the "No Digital Data" message.
o Next I tried reconfiguring the Audio Output setting in Audio MIDI Setup. I verified the Source was set for Digital Out, and tried each of the Format combinations that were available. Still getting the "No Digital Data" message.
o Finally, I tried the com.cod3r.a52codec.plist "hack," creating a new variable named "attemptPassthrough" and setting is value to "1." Same message.
So, I must be missing something and can certainly appreciate any words of wisdom from anyone with similar experiences with the Mini and the Z-5500.
Thanks in advance.

No problems. Any/all advice is truly appreciated.
So the PC can play audio through those speakers? That's a clue. Can you see the settings that PC is using to talk?
Yes, the PC can play any audio source (games, DVDs, Media Player, etc.) digitally to these speakers. The primary difference that I can think of is the PC employs a Creative Xi-Fi Fatal1ty Platinum PCI card which is Dolby Digital Live capable for encoding whereas I am using the encoder(s) (DVD player, Perian, etc.) on the Mini.
Did you look at the "Configure Speakers" button in Audio Midi Setup to verify that it is configured for multi-channel output?
Hmm, you may be onto something here. Yes, I did check to see that the Audio Output was set for Encoded Digital, but I didn't confirm multi-channel under Configure Speakers. Selecting this option and going to the Multichannel tab will only allow me to select "Stereo." All the other selections are grayed-out. In addition, when I do select "Encoded Digital" for Audio Output Format, both the Default & System Output windows display "Unknown device" instead of "Built-in Output."
Are those cables Apple branded? Something about the length of the mini-plug on some brands IIRC.
I believe so. I did get them directly from the online Apple Store. They're approximately 3' in length and off-white in color. Part number on the Packing List was given as: TL955LL/A and their description was: XTREMEMAC TOSLINK OPTICAL AUDIOACCS
Thanks again!

How do I export from FCP to a QuickTime file with multiple audio channels?

I'm delivering a project where the first step is to generate an HD Cam SR master, which I will be doing at a post-production lab. They will then do a QC check for me. To generate this HD Cam SR master, they need to me to bring in my 98-minute long movie on a firewire hard drive, in five equal parts -- QuickTime files. From these five QT files, the lab will then be creating an HD Cam SR master that will have...
dialogue on tracks 1 and 2
effects on tracks 3 and 4
music on tracks 5 and 6
MY QUESTION
a) I don't see any way to separate these audio tracks accordingly in the FCP menu for QuickTime export. Does anyone have any experience doing this?
b) And does anyone know the most efficient way to combine timeline audio tracks for this purpose? I have my dialogue sitting on the first FOUR audio tracks, actually. To deliver this film, I'll need to crush these four audio tracks to two, as listed above. I could generate an AIFF file, I suppose, import it back onto the timeline, sync it up, and then re-export along with the visuals to make the final QT file, but this seems like a generation loss.
thanks,
Shanked
PS the movie is made up of footage from a Sony PMW EX1. I used the codec "XDCAM 1080 24p 35mbs VBR" for editing in FCP. I'll either export to QT using this same codec or switch to "Apple ProRes" if my machine can somehow maintain the sync.

The following will answer both your questions a) and b).
Click on your master timeline and press cmd+0 (zero) to bring up Sequence Settings, then click on the Audio Outputs tab on the right. Click on the Outputs option and change it to 6. You can leave them as Stereo pairs.
Now, back on your timeline, you need to make sure all your audio is organised so each track. A1, A2, A3, A4 etc has all the relevant media on it.
Then, on the left of the timeline you see the Destination toggle buttons, then you see the Padlocks to lock tracks, then you have the Toggle Auto Select squares. If you right-click on the Toggle Auto Select squares you bring up a little sub-menu, at the top of this list you'll see Audio Outputs, which will show the stereo channels for that particular track. As you've changed the number of Audio Outputs in the Sequence Settings, the list will show: 1&2, 3&4, 5&6. You just tick whichever channels you want.
In your case, you have dialogue on the first 4 tracks, no problem, just go down through tracks 1,2,3 and 4 as described above and assign these to Audio Outputs 1&2.
Then just go down through your music and effects audio tracks and assign them accordingly.
Now, when you export your timeline as a self-contained media file, it will have different audio channels.
I hope that makes sense. When you change the number of audio outputs as described in the first step, I believe the rest of it is fairly self explanatory, once you know where the settings are.

Digital Audio output for W series - Alternatives

There's a thread talking about the displayport does not have audio-output. Its true and some people get victimized by ill-trained sales people who think their displayport is standard. There's no literature on Lenovo website warning users about the audio issue either - such thread is closed with the fact that (some) other manufacturers in the same period does have have audio either and Lenovo think they should be in the same boat.
Let's not go into the blamish again, but discuss what we can do with existing options with alternative digital audio out and line-in that the W series really really missed.
We have (1) mini-dock and (2) USB soundcard listed as options
I currently use a USB DAC (digital to analog) system and it do really good in terms of stereo music enjoyment. However my particular system does not have digital manupilated sound like 3-D surround or multi-channel output and not suprisely, laptop USB generally produce greater latency than desktop USB ports.
Besides USB, we have 1394 and express card 34 as expansion options.
What's your setup for digital audio out? Anyone know any internal soundcard that fits the slots of Wireless USB/Turbo memory PCI ports that all W-series have?

Other alternatives include
I know on mackbooks I've seen firewire used as an input for a Weiss Dac if you're into two channel audio. Do any reiceivers take firewire as an input for hometheater? Has anyone tested Firewire outputs on their W series? I'm told that firewire is sometimes preferable to USB, I'm not sure why this would be, can USB support passthrough of DTS encoded signals?
In the case that firewire works and you Do not have a firewire source, maybe something like this would be of value It converts firewire to digital coaxial s/pdif and allows passthrough of DTS and AC3.
http://www.m-audio.com/images/global/manuals/FireWire-Audiophile_Manual.pdf
As I'm into audio the critical thing here (and what you're paying for when you purchase blue-ray, is maintaining the digital information from the disk in an unconverted form. You want a direct bit pass through, and you want as little jitter introduced to the signal as possible. You most certainly don't want the sound card getting in the way, Digtital to Analog converting and then reverse packaging it up and putting it out over the soundcard digital out. My problem is I'm not familiar enough with computer audio to know how exactly the sounds is transmitted from your blue ray drive to the digital interface you've chosen.
Anyone know why USB digital out would not be a prefered method?
Moderator note; comment removed which contravened forum rules

Feature Request: Modify Audio Channels from the Timeline in Premiere CC.1

Why have we never been able to modify audio channels once a clip is added to a sequence? I'm guessing there's a good reason Adobe has never had this feature. The lack of this feature is explicitly mentioned a few times in the audio section of the Premiere Pro CC manual, as if it's a benefit NOT to have it. But the benefit is entirely lost on me.
In my workflow, I synchronize my double-system video and audio before anything else. I do this in PluralEyes (and unfortunately I'll have to keep doing it this way, until PPr's sync on sound feature gets fixed—for me it's never worked).
Once PluralEyes has synched hours of footage and audio and placed it on a PLURALEYES GENERATED sequence, I import that sequence into Premiere. Note: Since I haven't gone through the step of creating a blank New Sequence, I don't get the opportunity to setup my audio channels the way I'd like in my sequence (i.e. Stereo recordings should occupy ONE track, not two. Typically these tracks come from a camcorder and are used for reference sound, or ambient noise at best, so I don't need them taking up precious real estate in my sequence).
Since PluralEyes doesn't merge my clips for me (or rather I don't want it to since I'm usually doing multi-cam sequences where I want to keep all 14, or so, tracks of audio), I have to go through the clips one by one and do a Merge Clip action once I've adjusted any minor sync issues, or determined which tracks I actually want to keep. But, and here's the key, at this stage I'm not yet 100% certain whether I'll use the nat sound or the wireless mic sound (separate audio recorder, etc). Furthermore, I don't really want to think about that at this point. After I've spent a few mind-numbing hours just ingesting files, sync and merges, I want to jump into the edit as soon as possible, before I lose all will to finish this edit. If I modify my audio channels right now, I'll lose the ability to make some creative decisions later on.
I'd like to start whacking out an assembly edit. And then after I have a rough program, I can start looking at which audio tracks (nat or double-system) I like better in each circumstance. This is where I become stumped that at this stage, I'm locked into whatever audio channels I've setup (or not) in the earliest stage of the edit, back before any media was actually on the timeline! It's at this stage, and usually only at this stage that I want to start Modifying Channels—FROM THE TIMELINE!
Does anyone else feel the same? If not, what is your workflow?
Feature Summary: Right-click on any clip, (master clip, sub-clip, merged, nested or otherwise) in the timeline and choose Modify > Audio Channels.
I've submitted a feature request, with a link back to this discussion, so please pipe in—especially if you want this feature.

Maybe its your specific workflow, asset mangement and use of a 3rd party application that runs you into an issue.
Take Pluraleyes out of the equation, I would imagine my workflow is the same as most everyone else. Find footage in the Media Browser. Import it. Create a Sequence and start editing. Use the Source Monitor to set Ins and Outs and then Insert the clip on the timeline.
At this point, if the audio needs to be modified, it cannot be done on the Timeline. The workaround, of course, is to Find Clip in Project; Modify Audio in the Project panel; then do a Matchframe to replace the audio clip. This works, but requires many steps per clip. Also, Matchframe in Premiere Pro CC is not reliable.
Introducing a new Modify Audio (from Timeline) feature as seen in the fantasy screenshot above would solve it.
I dont use Pluraleyse ...which I understand to be a synching aid...so I dont know the workflow it imposes on one .
Returning to Pluraleyes workflow, this issue is compounded by the need to Modify almost ALL audio. Every stereo track is separated and placed on two MONO tracks taking up precious real estate. This is not something Pluraleyes imposes. It is due to the way Premiere imports XML timelines. This would apply to sequences imported from Final Cut as well.
In this case it would be ideal to select both the LEFT and RIGHT mono tracks and choose "Modify > Audio Channels > Merge L/R Mono to a Single Stereo track." Ideal? No. I guess Ideal would be if Premiere would interpret XML files properly in the first place.
What actually is the issue with Premieres synch and merge workflow in your case?
Audio Sync in Premiere Pro doesn't work. Period.

While importing clip getting error "The file contains too many audio channels" in premiere pro cs5

Hey,
I am using video clips from sony digital hi8 camera and trying to import video clips (.mov) 720*480 fps 29.97 .But unable to get into premiere pro cs5.System configuration:
MAC 10.6.4
2.66ghz intel core i7
4gb ram
nvidia geforce gt 330 mn.
Error :
Actually ,i have checked the inspector panel and i found same infomation in
in this panel for both clips .please check these clips screen shoots seprately .
Actually i have a long video clip and i have scatterred this clip into 6 diffrent portions
where i am not able to import the last video clip.It is giving me same error "file contain too many audio channels"".
Regards
Manoj

I too am getting this error in Premiere CS5. I was digitizing a Broadcast VHS and since I did not have a breakout box, I hooked it up to a Sony DV deck so I could connect via firewire and capture inside Premiere. I was able to capture and import 1 of the 3 clips and it did have 4 audio channels attached to it. However, upon closer inspection only 2 channels had a waveform. I captured the other 2 clips the same way, but this time, Premiere give the error "The file contains too many audio channels."
Any ideas?

Install OS X on a Digital Audio G4 with a new HDD

I picked up a Digital Audio G4 from a university surplus sale and I thought I'd play around with it. Unfortunately it came with no Hard Drive, but I managed to scrounge one up. I've got a set of OS X 10.4 install CDs that I know work but I can't seem to get the computer to boot to CD. When I turn it on I get a few minutes of blank screen, followed by a blank grey screen for as long as I keep the computer on. No error beeps, no startup chime (though I'm not even sure the speaker works), just a blank grey screen. What am I doing wrong?

Do this:
Extended Hard Drive Preparation
1. Boot from your the Installer Disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Installer menu (Utilities menu for Tiger, Leopard or Snow Leopard.)
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Note the SMART status of the drive in DU's status area. If it does not say "Verified" then the drive is failing or has failed and will need replacing. SMART info will not be reported on external drives. Otherwise, click on the Partition tab in the DU main window.
3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Set the format type to Mac OS Extended (Journaled.) Click on the Options button, set the partition scheme to GUID (for Intel Macs) or APM (for PPC Macs) then click on the OK button. Click on the Partition button and wait until the process has completed.
4. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list. Click on the Erase tab in the DU main window.
5. Set the format type to Mac OS Extended (Journaled.) Click on the Options button, check the button for Zero Data and click on OK to return to the Erase window.
6. Click on the Erase button. The format process can take up to several hours depending upon the drive size.

[Solved] Difficulty getting digital audio to play in all applications

This is probably a noobish question...
My motherboard supports digital audio out via S/PDIF cable (optical), as well as standard analog audio. I have a stereo receiver that I've plugged my optical cable into.
When I go to systemsettings > Multimedia > Phonon > Audio Playback, I put the "HDA Intel S/PDIF Digital" device on top and clicked Test. I could hear the test tone (playback source is PCM).
However, if I go to play an MP3 or whatever, I have to go into the settings for each application and tell it to use that particular device. Some applications (such as Firefox) do not have obvious settings for audio playback. Is there a way to solve the problem once and for all (tell the audio system "send everything through the digital device all the time")?
(I read the relevant section of the wiki, but it is focused on getting sound out of your digital device, not making it the default.)
Any other advice or gotchas about using digital audio would also be appreciated.
Thanks!
Last edited by nathanb (2012-01-25 20:58:42)

Bah, I did a system update and rebooted and now digital out doesn't work at all!
[nathanb@nathanb-box ~] aplay -L
null
Discard all samples (playback) or generate zero samples (capture)
front:CARD=Intel,DEV=0
HDA Intel, AD198x Analog
Front speakers
surround40:CARD=Intel,DEV=0
HDA Intel, AD198x Analog
4.0 Surround output to Front and Rear speakers
surround41:CARD=Intel,DEV=0
HDA Intel, AD198x Analog
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=Intel,DEV=0
HDA Intel, AD198x Analog
5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=Intel,DEV=0
HDA Intel, AD198x Analog
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=Intel,DEV=0
HDA Intel, AD198x Analog
7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=Intel,DEV=0
HDA Intel, AD198x Digital
IEC958 (S/PDIF) Digital Audio Output
Devices don't seem to have changed...
[root@nathanb-box nathanb]# amixer | grep IEC -A 8
Simple mixer control 'IEC958',0
Capabilities: pvolume cvolume pswitch pswitch-joined cswitch cswitch-joined penum
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: Playback 0 - 39 Capture 0 - 31
Front Left: Playback 39 [100%] [0.00dB] [on] Capture 31 [100%] [12.00dB] [on]
Front Right: Playback 39 [100%] [0.00dB] [on] Capture 31 [100%] [12.00dB] [on]
Simple mixer control 'IEC958 Default PCM',0
Capabilities: pswitch pswitch-joined penum
Playback channels: Mono
Mono: Playback [on]
Simple mixer control 'IEC958 Playback Source',0
Capabilities: enum
Items: 'PCM' 'ADC1' 'ADC2' 'ADC3'
Item0: 'PCM'
Channels still seem to be there...
My .asoundrc looks the same as above. But just for fun, I also tried removing it and restarting alsa, with no change.
I'm testing output by going to systemsettings > Multimedia > Phonon and clicking the Test button with "HDA Intel (AD198x Digital)" selected. Nothing comes out through SPDIF, though it does play through analog (I have two separate pairs of headphones plugged in, one to the analog jack and one to a headphone amp plugged through the digital port) so I can tell which port the audio is coming from).
I've checked the hardware volume, and it appears to be in order. The amp is not reporting any audio signal on the optical port. I tried switching out the cable just to be paranoid, and still nothing. I believe this is a software problem.
Any ideas?

Is there a way to get a Dock to a Digital Audio Cable?

I have a 5.1 Home theater and it has 2 Digital Audio imputs and the standard Red and White. I want to listen to my music but i lost the dock that came with it. Is there a cable that would go straigt into the digital audio input and into my iphone to give me 5.1 channels? And right now i am just hooking a USB with my music to my tv and then playing it from there and it plays in 5.1. I got the 4s.
Thanks.

If you want an exact PDF of the book follow the preview instructions and save the resulting PDF -
preview it using this method - http://support.apple.com/kb/HT1040 - and save the resulting PDF
LM

Number of Digital Audio Channels?

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