The Quest for the holy DIY Decoder

[macgyver]

Does anyone have a schematic for creative DDTS-100 decoder?

 

[OzOnE_2k3]

Hi,

To be honest, I don't it's likely that anyone will find the proper schematics any time soon.

You should be able to download nearly all of the datasheets for the different ICs though and work things out from that. It depends what you intend to do.

What did you have in mind?


OzOnE.

 

[macgyver]

Hi,

To be honest, I don't it's likely that anyone will find the proper schematics any time soon.

You should be able to download nearly all of the datasheets for the different ICs though and work things out from that. It depends what you intend to do.

What did you have in mind?


OzOnE.

I was planning to build diy decoder. Maybe put new dacs and vfd display to show some stats (like volume etc). So there is no delay adjustment in creative?

 

[Pidgeon]

Hello, sorry if I leave a message on this old thread, but it seems to be very interesting, and it could be a pity to forget about it.

Let's suppose I've got a S750 system, DDTS-100 and X-Fi Prelude.

Here is what I know:

- Connecting speakers with sound card through the decoder switch box, should give me the full quality in analogue mode (because I directly use the Prelude DACs and OPAms)

- When playing DTS/DD movies, audio goes to decoder in digital form, so the final quality (surely lower than the Prelude in analogue mode) depends from the decoder DACS and OPAmps...

My question is: could it be possible to replace some decoder components (DACs, OPAmps etc.) so that we can increase the quality of the final sound, when in digital mode?

This should give us a really good quality as the Prelude with modded components, isn't it?

Other thing I know is that the following components are in-board:

http://focus.ti.com/docs/prod/folders/print/pcm1600.html
http://focus.ti.com/docs/prod/folders/print/pcm1716.html

Could it be a good idea, for example, to replace them with:

http://focus.ti.com/docs/prod/folders/print/pcm1605.html
http://focus.ti.com/docs/prod/folders/print/pcm1792.html

?

 

[DriX]

I know this thread is very old, but someone might want to take a look at this:

The PT8501 is a complete low-cost decoder for use in the decompression of higher-performance multi-channel digital audio, such as Dolby Digital (also called AC3). The PT8501 provides a complete and flexible solution for multi-channel audio decoding in laser-disc players, DVD movie players, stereo receivers, out-board decoders, HDTV sets, head-end decoders, set-top boxes, and similar products.
PT8501 contains on-chip firmware for decoding and processing DOLBY DIGITAL (AC-3), linear PCM data. It also includes a Dolby Pro Logic decoder for decoding matrix surround encoded PCM data or 2-ch Dolby digital data. With a built-in S/PDIF receiver, no external S/PDIF receiver is necessary in order to receive digital bitstreams.

http://www.allproducts.com/ee/princeton/Product-20081028115250.html

And the datasheet: http://www.princeton.com.tw/downloadprocess/downloadfile.asp?mydownload=PT8501_s.pdf

 

[theakseffect]

Sorry to reply in this old post, but it seemed the right one to post my question to, which is: what do I need to do to get bass with the Creative DDTS-100 in combination with non-Creative speakers (from a 5.1 DD sound source connected via TOSLINK)?

Unfortunately I never modded a decoder or anything sound related before, I do however have some experience with GPU and CPU modding (soldering, pencil-mods, etc).

Thanks in advance for a reply.

 

[DUCKFACE]

anybody try something with PT8501 ?

 

[matthai]

Anybody have full datasheets of PT8501?