TV@nywhere (CX23881) does NOT support dbx stereo

C

captune

Guest
(Most of the following info are gathered from a Taiwan VIVO forum.)

Fact #1: TV@nywhere uses CX23881 chipset (in fact it may even be Cx23881-17, an earlier version of CX23881, rather than the later version CX23881-27). Look at your own card and see for yourself.

Fact #2: CX23881 does NOT support certain format of broadcast stereo.

Check this Conexant webpage
http://www.conexant.com/products/techdocs_detail.jsp?id=10 and read this pdf file
http://www.conexant.com/servlets/DownloadServlet/101550b.pdf?FileId=701 (760 kB size)

From the table, for broadcast audio CX23880 supports "BTSC dbx, NICAM, A2, EIAJ, FM", but Cx23881 only supports "NICAM, A2, FM".

CONCLUSION: If broadcast audio in your area uses dbx (and I think North America uses dbx stereo), then you are out of luck - TV@nywhere, in its present incarnation of using CX23881, does NOT support dbx stereo or SAP. It is NOT a driver issue, but a hardware/chipset thingy. So don't expect future driver to fix it. Come to think of it I suspect that is why (for those US users) the new driver has the stereo option greyed out - MSI is just quietly acknowledging this function is simply not supported!

Additional info
1) Words have it that initiallly MSI planned to use CX23880 chipset (which has more features) but later they changed the design. In fact some Taiwan buyers discovered, much to their chagrin, the labels on their boxes show "CX23880" but the cards inside contain CX23881 chipset!

2) MSI website says TV@nywhere has "CX23881/883". For those who still consider buying this newer generation of 10 bits ADC chipset AND want dbx stereo, you may want to wait for MSI to release CX23883 version which does support this feature. (http://www.conexant.com/servlets/DownloadServlet/102055b.pdf?FileId=981)

Alternatively for NTSC users, you might consider Asus new tuner card using CX23880 chip.
http://www.asus.com.tw/vga/tvtuner/features.htm

3) Another CX2388x card is from Prolink (PlayTV HD), but it too uses CX23881 chipset like TV@nywhere.

Hope this help to clarify things and save some of you the annoyance of waiting and hoping in vain something (driver that support dbx stereo) that has never been there.
 
S

sidim

Guest
Hi, really strange check your info,

I install my card and with the beta driver i don't have stereo with MSIPVS soft but i have Stereo with PowerVCR II
So how do you explaine that.

sidi
 
C

captune

Guest
Originally posted by sidim
I install my card and with the beta driver i don't have stereo with MSIPVS soft but i have Stereo with PowerVCR II
So how do you explaine that.

sidi
Possible alternative explanations:

1) TV@nywhere with CX23881 supports SOME broadcast stereo e.g. Nicam, A2, but not others e.g dbx. Maybe the broadcast stereo in your area uses Nikam or A2?

(Next 2 paragraphs are just my speculation/guess.)

I believe a great majority of MSI customers are in North America, and their technical support tend to prioritise those segment of customers. So I speculate that in their newer driver/software (including MSIPVS)) MSI just simply disable stereo function so as not to confuse them because it never works for dbx stereo in the first place. As a result ALL users who use the later MSIPVS are affected even though some of them live in places that have Nicam stereo.

However, PowerVCR II may correctly detected the support for Nicam/A2 stereo, which if broadcasted in your area, will comes through TV@nywhere.

2) You are lucky and get a different chipset than CX23881-17 on your TV@nywhere. Look at your card.

3) You are miraculously lucky and get a CX23881-17 that support dbx (if your stereo is dbx). ;) :D

4) My info is wrong.
 
K

kody

Guest
Well this is my third attempt to reply to this forum. It is a very slow link (many timeouts via cable modem) for me. It would be really nice if MSI would mirror this forum to the states. (www.msicomputer.com seems so much faster). Also, it would be nice if they would mirror the drivers and software. sigh.

I tried out powervcr 2 for the first time today. To get it to work, I had to use the conexant 2.0.66 driver (beta). The link can be found on a earlier post. I would of provided it, but timeout probs. Powervcr 2 did not provide stereo for me. I reverted back to conexant 2.1.68 and the msipvs tuner software. I am more pleased with this product then I am Powervcr 2. I am not recieving stereo at all anymore, sigh. Captune, if you ever find a killer capture card that does not cost an "arm and a leg", let us know. This card is still pretty cool for the cost.
 
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