Loss of Dolby Digital signal with Tivo HD

Discussion in 'TiVo Series3 HDTV DVRs' started by mike_camden, Jan 26, 2008.

  1. Feb 4, 2008 #21 of 188

    mike_camden New Member

    Dec 11, 2006


    I'm using optical (I've tried three cables), but I tried HDMI and had the same problem. As I mentioned in a post above, I didn't start noticing this problem when I was using a Panny digital receiver; I didn't notice it until I started using an Onkyo, so I'm thinking it has something to do with sensitivity of the receiver as someone above mentioned. Unfortunately, I don't have another receiver to try. I don't blame the receiver though because it's not there when I rewind. This makes me think that periodically, the Tivo processing isn't able to keep up with recording/output. This causes the Tivo to have a very short(i.e. millisecond) drop in signal outputted. The Onkyo may be extra sensitive to these drops causing it to switch processing modes and make it seem like the drop is in actuality a second or two instead of a millisecond (that probably wouldn't be noticeable). Just my speculation. Not too sure who can claim responsibility to fix the issue (Tivo, Onkyo, or Comcast for the signal), but I'm not holding my breath.
  2. Feb 5, 2008 #22 of 188

    Supermurph New Member

    Oct 15, 2007
    Scottsdale, AZ
    I'm having the issue with a Sony receiver. I called Tivo and the guy talked me through a few things, but overall was not very helpful. I was using a HDMI cable to my TV and a TOSLink to my stereo. So, I've switched the video to component cable to see if maybe the Tivo was splitting the audio signal between the HDMI and TosLink. So far, I'm not sure. I definitely have not had the total drop out of the voice track that was occurring, but since I'm also having issue with the Tivo just going out . . . picture and all . . . . I'm not quite certain it's fixed yet.

    If anybody else can post if they have this issue with component video and Toslink; no HDMI, it might help narrow it down.
  3. Feb 5, 2008 #23 of 188

    jalex New Member

    Dec 8, 2004
    Just to add another data point, I'm using HDMI to go from the TiVo HD into the Onkyo and I'm seeing the same behavior. As others reported, this is not at any (noticeable) break in the stream -- not at a commercial boundary or any other cut for that matter. I haven't tried switching to PCM, but I assume that would resolve the problem (but then I'd be sending PCM to the receiver!).

    Has anybody encoutered this with a Series 3? Is this only a TiVo HD problem?
  4. Feb 5, 2008 #24 of 188

    njdtivo Member

    Nov 11, 2002
    New Jersey
    I experience it sporadically using an S3 and a Denon receiver.
  5. Feb 5, 2008 #25 of 188

    ilh New Member

    Dec 21, 2007


    So much for THD and/or Onkyo. The common thread is the TiVo software.
  6. Feb 16, 2008 #26 of 188

    gwar9999 New Member

    Jan 15, 2007
    I have similar issues but the dropout lasts for 1 second every time that I change channels within the first 5 seconds of the signal. That is, if I'm watching channel 2 and switch to 3 within 5 seconds I will lose audio for a second and then it will resume as normal. Occasionally, the audio will drop a second time particularly when switching to ESPN. I've noticed this on every channel: analog, digital, HD.

    The problem was caused by a software upgrade. I confirmed this recently since I received a replacement S3 w/ 8.0 software that did not have the problem. When it upgraded to 9.2 the problem returned just like in my original S3.

    I have my TiVo set to DD using HDMI to my Yamaha RX-v2700 receiver. The Yamaha handles audio perfectly from my other devices (PS3, DVD, etc) and since TiVo software 8.0 didn't have this problem it is definitely a bug that TiVo introduced in either 9.1 or 9.2.

    I guess I can try PCM until the next software update.
  7. Feb 17, 2008 #27 of 188

    kirk1701 New Member

    Feb 4, 2007
    I think your right, most of the time I don't use a receiver just the volume on the TV (The other half don't like surround sound) :eek: and I still get the drops in sound and its not seconds, just a very short millisecond interuption that if you rewind to that same spot its not there the second time around. However, my millisecond drops are every 30 seconds or so appart.

    I'm connected via HDMI to the TV
  8. Feb 17, 2008 #28 of 188

    gwar9999 New Member

    Jan 15, 2007
    Nope, the "Dolby To PCM" doesn't correct the problem for me. I guess I have no choice but to wait for the 9.2 successor (or the version after that!) so I switched back to Dolby Digital on my receiver. FWIW, I always watch TV through my Yamaha receiver but it's a TiVo bug and has nothing to do with my receiver which works perfectly for all other devices.
  9. Feb 19, 2008 #29 of 188

    alanronkin New Member

    Dec 27, 2005
    I am having the same problem with the Bose 3-2-1 system. Very annoying. Has anyone heard from Tivo?
  10. Feb 25, 2008 #30 of 188

    BeeEss New Member

    Aug 29, 2007
    Just thought I'd throw my hat in this ring too:

    Tivo HD --> Onkyo TX-SR605 via HDMI.

    My SO is about to kill me - I'll try the PCM setting tonight to see if that clears anything up.

    Incidentally, since the 605 can't send digital inputs to Zone 2, I ran a regular RCA cable from the Tivo's analog out into the Tape input on my 605. Then I set Zone 2 to the Tape input to run a set of wireless speakers in the next room so I can hear whatever is on TV. When the DD dropouts happen, the analog stream coming from the Tivo isn't lost - it works just fine. I suspect that's why the PCM setting is working for some people.

    I'll be watching this one closely to see if there is any resolution.


  11. Feb 25, 2008 #31 of 188

    Javajane New Member

    Jan 11, 2003
    Near the end of January, beginning in February, I began to have sound problems with HBO and Comedy Central. It's interesting that these posts began around the same time. The sound would just cut out completely. The Dolby icon would be missing in the info menu. Usually selecting DD to PCM would solve the problem, but many times I've had to reboot the Tivo.

    Lately, it's been getting worse. If I Tivo two shows at the same time, one of them is missing the audio. Also, I've had more and more problems connecting with HDMI. I have a series 3 HD Tivo connected to HDMI and have a Denon receiver and use Comcast cablecards. .

    I called Tivo today and they didn't have an answer. They're going to send me a new HDMI cable to see if that's the problem. However, I decided to check here and it seems that most of us had the problem beginning around the same time, so maybe software is the problem? I've had a Series 2 for years with only a few minor glitches. What gives Tivo?
  12. Feb 25, 2008 #32 of 188

    tw144 New Member

    Feb 5, 2004
    I'm a Tivo HD user, with TivoHD-> HDMI -> Onkyo SR605, and I have been having the same Dolby Digital issue described here for a few months now. I can put up with it, but when the glitch occurs it really bugs the wife....

    I don't get the same issue with Dolby Digital using DVDPlayer -> HDMI -> Onkyo SR605, so I suspect the problem is the TivoHD.
  13. Feb 25, 2008 #33 of 188

    Joybob New Member

    Oct 2, 2007
    Comedy Central is dolby digital???
  14. Feb 26, 2008 #34 of 188

    mike_camden New Member

    Dec 11, 2006
    I don't think that will help. My audio connection for Tivo HD is optical out to the Onkyo SR605. I have tried going straight HDMI; and it doesn't make a difference. I experience audio drop outs either way.
  15. Feb 26, 2008 #35 of 188

    bkdtv New Member

    Jan 9, 2003
    DC Metro Area
    It is not DD5.1.

    Some providers may deliver it as DD2.0.
  16. Mar 14, 2008 #36 of 188

    ChrisNJ New Member

    Mar 6, 2007
    I had this happen to me for the first time last night on my Tivo S3 and a brand new Yamaha V663 connected via HDMI. Watching Lost in HD (OTA, no cablecards). Lost and Reaper were both recording and it only happened when I was watching in real time. If I skipped back the audio drop was not present in the recording and no other audio dropouts occurred. As soon as I went back to live the dropouts reappeared.
  17. Mar 14, 2008 #37 of 188

    mike_camden New Member

    Dec 11, 2006
    I don't know why, but I may have found something that fixes the issue without disabling DD. While messing around with the some settings today, I noticed in the info window that CC was listed as being turned on (even though I didn't have the captioning on my screen). I clicked on it and selected off for the CC state. That was about three hours ago; I haven't noticed a single audio drop since. prior to my doing that, I was experiencing an audio drop approx. every 20 minutes. Only time will tell if it fixed it.
  18. Mar 20, 2008 #38 of 188

    mike_camden New Member

    Dec 11, 2006
    The dropouts are back, so I guess this didn't fix it :-(
  19. Mar 22, 2008 #39 of 188

    stluser New Member

    Oct 19, 2004
    I too have noticed this problem, and I must say I think it came after the 9.2 update. I never seemed to have this problem before 9.2, and also when I had my old DirecTivo, I never had any issues.

    I have a Series 3 Tivo connected to a Sony receiver by optical cable. The Series 3 to TV connection is through HDMI.

    I too have noticed that changed to output PCM only seems to "fix" the problem. When the audio dropouts occur, my receiver display flickers, noting the reset in Dolby (does not necessarily have to be in 5.1). Also note that rewinding to the same spot does not produce the dropout, so it is clearly not a signal strength or bad hard drive spot issue.

    Hope this gets resolved soon.

    Interesting that the main theory seems to be hardware overload of the box. Doesn't this remind you somewhat of the same audio dropouts we were getting when scrolling through the menu guides which was fixed with the subsequent update? Obviously it is occuring without the menu grid now, but the type of dropout and time duration is very similar
  20. Mar 25, 2008 #40 of 188

    RayHs New Member

    Mar 8, 2008
    I seem to be having a similar issue with a new Tivo HD (9.2a) connected to an older Denon receiver via optical cable except in my case it's much worse.

    In my case I completely lose sound when I change channels. It's not that the Tivo stops sending the audio stream but something happens to the audio data that causes the Denon to light up the error/overload led on it's panel. Toggling the digital/analog input on the Denon from digital to analog then back again clears the error and sound is restored.

    I do not have this problem using the digital audio coax from the cable box that I still have and it's not an optical problem since I've also tried running the Tivo optical cable through an optical to coax converter and it has the same problem.

    My guess is there's something occurring during channel changes where the Tivo is not correctly stopping and restarting the data stream, possibly causing invalid data to be sent and causing the Denon to lock with an error. It's possible that other receivers or newer ones may be intelligent enough to drop the invalid data and re-sync. My current workaround is using analog.

Share This Page

spam firewall