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Time to play stump the forum ;)

Old 07-18-00, 10:38 PM
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I have a Toshiba SD1200 DVD player. It's a very nice machine and while the buttons on the remote are a bit small it is still a great design. However, i've noticed one disturbing thing. Often when switching into DD 5.1 audio(in the menu of the disc),or when the audio tracks change from prologic to 5.1 (except for manually during the movie) a loud "thump" is heard through my speakers. I'm using the Coaxial digital out to connect to my dolby digital reciever(Cambridge Soundworks). I had a Sharp DVD player that i had connected to this system that did not make this sound so I know it's not the reciever. This is the second SD1200 I've had and both have this problem. I also have found a thread about a guy with a similiar model Toshiba who had similiar problems @ http://x74.deja.com/getdoc.xp?AN=620...1466&hitnum=1. I've not called Toshiba yet, but I'm thinking it's just some weird glitch between the player and the amp. Thanks for the help.


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Old 07-19-00, 12:52 AM
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I'm no expert but I think it's the dvd player giving the thump when it switches over. I've heard this same problem with first generation DD receivers, the thump. The electronic section is not quite up to snuff to handle the transition without giving off that sound.
Old 07-19-00, 08:20 AM
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Toshiba SD1200 and a Yammy DD/DTS Receiver, no thumps on digital kick-in.

If you can, try another receiver with the SD1200, and vice-versa with the receiver and another DVD player. Figure out if one or the other is the culprit, or if its something else.

Mike

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Old 07-19-00, 12:53 PM
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It really sounds like a problem with the DSP chip in the receiver. The dvd player is probably just sending a large digital signal while changing over diffrent audio formats which is overloading the processor on your receiver.

You mention that your receiver is Cambridge soundworks. Do you mean the Desktop Theater, or a regular receiver you bought from their website? The Desktop Theater used a decoder that is at least three years old and so may not be able to handle digital overload like vitually any receiver on the market today.
Old 07-19-00, 05:17 PM
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I experience the same loud thumping noise when ff or rew a dvd (JVC 501VBK) with the audio set to DD. I don't experience this if the audio is set to DTS or Pro Logic. I notice that the reciever (JVC 888VBK) switches out of DD when the dvd is is in ff or rew and then back to DD when you hit play.
Old 07-19-00, 06:49 PM
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daledude,
It is in fact the desktop theatre DTT2500. I'm still skeptical that it is the reciever because the Sharp DV-600u i used to have did not exhibit this behavior at all(but had problems of it's own, like random skipping . The fact that two SD 1200's have done this to me while other people's sd1200's don't do it at all really boggles my mind. Perhaps I should swing by the Cambridge Soundworks store near me as well as calling toshiba.Once i'm into the movie, the thump doesn't occur but i'm just afraid my semi brain dead college roommate my try watching a movie and crank the sound before entering the movie and blow all 5 of my speakers. The only other thing I can think of that would be causing the problem is a poorly shielded or damaged digital coax cable. I'm using the one included with the Dtt2500 which is kinda thin(although i tried a composite video cable with similiar results) i doubt purchasing a monster cable to replace it would solve anything because it is a digital signal,but I'm willing to try it if anyone thinks it might work. Anyhow thanks for the help.

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[This message has been edited by dfbennett (edited July 19, 2000).]
Old 07-19-00, 09:55 PM
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I would not reccomend wasting your money on a new cable. If the decoder is getting a signal throughout the movie, then there is nothing wrong with your cable.

Diffrent dvd players have diffrences in how they output digital sound. I do recall reading that toshiba players have a quirk in which instead of turning there digital output to 0, they would completely turn it off. Or maybe it was the other way around. Anyway, the point is that the decoder may not like what your Toshiba is doing.

I strongly suggest you talk to the people at Cambridge Soundworks and see what they know about this. Considering the popularity of Toshiba dvd players, they may have a fix for this problem if it is common or else they can tell you outright if you have a bad decoder.
Old 07-20-00, 02:53 AM
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Daledude,
Thanks for the help, I'll call Cambridge Soundworks as well as Toshiba as soon as I get the chance. Perhaps they will have some suggestions on remeding this minor but annoying problem. Thanks

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