SPDIF out for AAC?

[K-Dash]

I was wondering if its possible for SPDIF out for aac since i can't seem to get this working somehow @@ please help, thx in advance.

[KpeX]

The DirectShow filter would need to support S/pdif output. As far as I know none does at the moment. You can try bugging the CoreAAC people if you want ;). Do you have an AAC supporting hardware device?

[DIggedy]

I use an optical digital out from my pc to connect to my 5.1 speakers to play aac files through iTunes and it works fine.

[K-Dash]

Kpex: No, I don't have a AAC supporting hardware device as far I know :(

DIggedy: Sad thing but I don't have an optical out either :(

I'll just have to pray real hard that they support it in the near future, thx for ur help.

[KpeX]

@ diggedy

What hardware AAC device are you using? (just out of curiousity) What types of AAC are supported? (LC/HE, Mpeg 2/4)

[amigd23]

I guess he is not using SPDIF for AAC, he is just using SPDIF for the decoded PCS format.

[KpeX]

Probably. I was hoping though.

[ermannob]

Maybe we should keep track of MatrixMixer. It doesn't support SPDIF passthrough yet, but it's not far from that. AC3Filter (its brother project) does the passthrough.

[DIggedy]

As already guessed my hardware doesn't support AAC. But I do get playback through optical, so I guess it's being converted to PCM on it's way out.

[Saiya-Jin]

I'm bumping this thread with a question.
How is the situation with AAC DS filters?
In my case, I'm using optical output (Hercules Fortissimo 7.1 III) to my receiver, and I'm not sure if the 5.1 AAC file is playing in 5.1 mode. I didn't have the chance of testing much though. But anyway, is it possible to have 5.1 sound through SPDIF output from AAC files?

[bond]

look here (http://forums.3ivx.com/cgi-bin/ikonboard/topic.cgi?forum=15&topic=84)

[SeeMoreDigital]

Originally posted by DIggedy
I use an optical digital out from my pc to connect to my 5.1 speakers to play aac files through iTunes and it works fine. I doubt whether your encodes will be pure 6Ch AAC. The rear channels are more likely to be matrixed together - ie they sound the same. Just like a Dolby ProLogic track!

Cheers

EDIT: I forgot to mention that this is what happens when I play AAC files on my PC and send the audio to my DSS amp (via electrical or optical). It's often confusing because the front right, front centre and front left channels are steered very accurately!

[Saiya-Jin]

What's the difference between mpeg-2 aac and mpeg-4 aac? I don't recall seeing anything using mpeg-2 aac before...

Btw, nice to see aac decoding in hardware already appearing :D

[bond]

Originally posted by Saiya-Jin
What's the difference between mpeg-2 aac and mpeg-4 aac?there is no real difference, everything mpeg-2 aac can do is also possible with mpeg-4 aac