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Odd Audio Dropouts

Discussion in 'TiVo Roamio DVRs' started by kbmb, Oct 1, 2015.

  1. kbmb

    kbmb Well-Known Member

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    Jun 22, 2004
    NH
    While that may be, it is clearly the TiVo itself causing the issue as anytime I have ever had dropouts, rewinding and re-playing the same spot usually saw the dropout go away.

    And I really, really, can't believe I started this thread Oct 2015 and it's still happening.

    -Kevin
     
    JoeKustra likes this.
  2. keenanSR

    keenanSR Active Member TCF Club

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    Oct 12, 2004
    Santa Rosa CA
    I've never given much thought to audio dropouts going to and from the menus, I've just figured that it's part and parcel to how the device works and it doesn't really detract from my viewing pleasure. If I'm going into the menus I'm very likely not paying a lot of attention to what's actually playing.

    It is possible, and I've noted here it in the past, that the dropout problem could be related to less than perfect data from the incoming channel itself. My thinking is that the TiVo error correction is failing to correct that abnormal data. Again, though, the SD Prime device I have seems to handle these very same data streams perfectly with no dropouts at all.
     
  3. keenanSR

    keenanSR Active Member TCF Club

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    Yes, indeed, and that's what makes me so angry about this issue and it's also why I'm 100% convinced it's never going to be solved.
     
  4. kbmb

    kbmb Well-Known Member

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    Jun 22, 2004
    NH
    I hear ya. And because it's so random - I think TiVo just gave up trying. I get it, it's hard to diagnose and fix. But I believe it affected enough different people on enough different cable platforms to where they could have tried harder to figure out why it is happening.

    Sidenote: I think TiVo is in maintenance mode now anyway. For me, both our Lifetime boxes are past the break-even point. With the direction of the cable companies and the likely move to IP delivery - I'm just waiting until the day I just give in and either go all streaming or switch to their box (X1). We watch as many shows as we can on Hulu now anyway mainly because Comcast's picture quality is so bad. Prior to that, we used to watch as much on Hulu because I couldn't take the TiVo dropouts :p

    -Kevin
     
  5. keenanSR

    keenanSR Active Member TCF Club

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    Oct 12, 2004
    Santa Rosa CA
    Same here, and I'm just glad I only paid $225 for my new(unused display model) Pro, had I paid retail price I would be absolutely livid at this point. As I said earlier, its primary use now is for the streaming services. I'm now looking forward more than ever to SiliconDust getting their DVR solution to a release candidate condition. It actually works now but there's still some bells and whistles to be worked out. If TiVo comes out with a streaming box, without a monthly service fee, I might be interested in that but I won't be buying any sort of DVR from them ever again, as you've noted, the DVR-style device is on its way out anyway.
     
  6. tivolocity

    tivolocity Member

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    Aug 12, 2002
    Denver, CO
    I haven't looked at this very closely, but here's what we experienced last night. We were watching The Voice live on the local Denver NBC affiliate using my Roamio Basic which is connected to Comcast cable. There were a lot of audio dropouts (btw., connected to a Yamaha receiver). I tried jumping back, and when it replayed the dropouts were still happening in the same places. It finally got so bad that I decided to try playing back the same episode of the show that was being recorded on my Roamio OTA connected to an antenna. When playing back the OTA recording there were no audio dropouts.
     
  7. keenanSR

    keenanSR Active Member TCF Club

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    Oct 12, 2004
    Santa Rosa CA
    I just finished with a 40 min call to TiVo tech support on this audio problem. The end result was that he said my SNR numbers were too high. They ranged from 35 - 39 and he said those were too high and that I needed to contact my cable company to fix it.

    Personally, I don't believe that the SNR number has anything to do with the problem many of us have been having and in fact, many months ago I went through the whole signal attenuation process using all different values of attenuators and even in combination to see if that helped and it made no difference at all.

    I give up.
     
  8. JoeKustra

    JoeKustra Cable only TCF Club

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    Dec 7, 2012
    Ashland, PA...
    I understand. I have a pair of Roamio, a Premiere and two Sony TV sets. All have a SNR of 35db or 36db. But Roamio signal is always 90%, Premiere is always 78% and TV is always 75%. Only the Roamio has "odd audio dropouts".

    One Roamio was connected directly to a small 24" TV that was mono only, so the output was PCM. I replaced the TV with a Sharp/Roku 32" that supports DD 5.1. Now there are dropouts. But the audio is much better.
     
  9. kbmb

    kbmb Well-Known Member

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    Jun 22, 2004
    NH
    Ugh. The old SNR too high excuse. I'm sorry you had to go through all that.

    -Kevin
     
    keenanSR likes this.
  10. keenanSR

    keenanSR Active Member TCF Club

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    Oct 12, 2004
    Santa Rosa CA
    Yeah...and the thing is, that didn't occur to me while on the phone, is that if that had anything at all to do with it why does the problem usually correct itself when rewinding? If that reading, whatever the heck is it, I'm not sure the people at TiVo even know what it is, were the problem the dropout would be a permanent part of the recording and no amount of rewinding would ever fix it.

    If I had the cable company(Comcast) come out to "fix" it, all I'd end up with is a bill for a waste of time service call, and something tells me TiVo ain't gonna pay for it.
     
    Last edited: Mar 23, 2017
  11. keenanSR

    keenanSR Active Member TCF Club

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    Santa Rosa CA
    The main reason I even made the call was because TiVo had "Closed" the support ticket I had opened just a few days ago and I wanted to yell at somebody!:D
     
  12. keenanSR

    keenanSR Active Member TCF Club

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    Oct 12, 2004
    Santa Rosa CA
    It's happening on all 3 of my TiVos; Pro, Basic and Mini.

    And yet I can go many hours on all of those devices with no dropouts at all... sigh...
     
  13. JoeKustra

    JoeKustra Cable only TCF Club

    7,590
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    Dec 7, 2012
    Ashland, PA...
    I forgot to mention that my Mini is much worse than my Roamio. I only use it for an hour a day, so I forget about it.
     
  14. keenanSR

    keenanSR Active Member TCF Club

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    Oct 12, 2004
    Santa Rosa CA
    When it happens it does seem to be worse on the Mini, yet I've been using it all day today and haven't had a single dropout. (head bashes brick wall)
     
  15. choco

    choco Member

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    Nov 3, 2000
    Southern CA
    I see audio problems/dropouts mainly on a single channel (CBS). We recorded Ransom last night, and the entire recording has no audio at all. Rewinding or replaying doesn't help. This has happened in the past too.

    I tested the channel just now, and I can reproduce audio problems pretty often with live TV. If I flip directly to the channel by keying in the channel number, every so often there will be no audio at all. But if I then press channel up/down to flip to the next channel and back to CBS, the audio starts working for CBS. The audio dropout only seems to occur if I jump directly to the channel by keying in the channel number on the remote.

    My impression is that this issue only started happening in the past couple months, and usually on Saturdays, for some reason. It could be that the Tivo isn't recording much on Saturday, and if the issue is somehow related to channel changing, it doesn't need to do so as much on Saturdays for us.

    I don't know why the problem doesn't seem to occur on other channels. I've noticed minor audio dropouts on other channels for a second or two, but nothing like CBS, where the audio drops out for long periods without returning. Maybe it's some interaction between Cox's CBS feed and Roamio.
     
  16. choco

    choco Member

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    Nov 3, 2000
    Southern CA
    I tested more and found some peculiar, completely reproducible audio and video dropout behavior. If I switch from CBS to certain channels (let's say, channels A, B, and C) and then back to CBS, it always causes the audio to dropout on CBS (video still works). If I switch from CBS to other channels (let's say, channels D, E, and F) and then back to CBS, it always causes the video to dropout on CBS (audio still works). This behavior is completely reproducible. Switching from CBS to particular channels and then back to CBS always causes either an audio or video dropout, every single time without fail. This problem only happens with CBS. Accessing the menu (Tivo button) or flipping to a "good" channel (not channels A, B, C, D, E, or F) and then back to CBS will fix the audio or video dropout on CBS.

    I've looked at diagnostics and haven't seen anything out of the ordinary for signal strength, SNR, video, or audio PIDs for the various channels, but I don't know enough about it to make a good conclusion. I've also tried using different tuners for CBS and both Dolby and PCM Only sound, but the same dropouts occur in all cases. For reference, I have a Roamio running 20.7.1.

    Since this behavior is completely reproducible, it seems like something the Tivo engineers could debug.
     
  17. CosmoGeek

    CosmoGeek Member

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    Feb 26, 2007
    Antarctica
    Same here. Frequent audio dropouts on channel 703 NBC Comcast Mountain View, CA (Bay Area). I have seen it on another channel but don't recall the channel. HDMI straight from my Roamio PRO to my Samsung 55KS8000. Lately, (I believe since the update to 20.7.1, but that could be a coincidence) I've also been getting stuttering/jerky/dropped frames in the video, even on shows recorded long before I ever noticed this problem. Maybe the software update, or maybe a failing HD? I am so frustrated at this point. I'm about ready to ask Comcast for their DVR.
     

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