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Thread: Tivo losing sound - comes back after reboot

  1. #51
    Join Date
    May 2004
    Location
    Wellington, NZ
    Posts
    477
    Quote Originally Posted by sikkie View Post
    I have installed the new Palmod.o for PAL-I, but the still get the same noises from time to time. The recordings also have patches of noise on it.
    Not quite understanding the different PAL versions, I have the following questions:
    1. How is it possible to even get sound with the sound band at 6 Mhz as to 5,5 Mhz for NZ or is the tuner good enough to pick it up?
    2. Is the noise I am getting not the same as the other people were getting before the mod on the Oztivo forum and would it not disappear if I can get a compilation of both the PAL-I mod and the other mods done for the Oztivo?

    Thanks a lot for all the work already done on this!
    It's hard to figure out what the problem is without the PALMOD entries from the /var/log/kernel log file. Both the MSP3430G and MSP3410D will autodetect the NICAM offset correctly... the problem you might have is that if you are running a US TiVo in a NICAM country then you are likely to have trouble getting a NICAM stereo input (a simple explanation can be found here).

    The MSP3430G found in the US units is not capable of NICAM, and while the MSP3410D chips (which are found in the UK units) can be transplanted into a US unit I have not been able to find a way of activating NICAM stereo due to what I am assuming is a master/slave conflict with the I2S bus.

    In my US unit (which has a tuner) I have hardwired the left-channel output from the tuner into the left and right inputs of the sound processor (MSP chip) - thus giving me a clean mono signal.

    It is possible (and quite easy) to get a NICAM signal working with the UK hardware (as the hardware was designed to run in PAL countries with NICAM).

  2. #52
    Join Date
    Apr 2004
    Location
    Perth, Western Australia
    Posts
    3,037
    Quote Originally Posted by finethen View Post
    Yes they were both modded at the same time with the same components. How certain would you be re the regulator? Easy enough for an amateur to replace?
    I have had to do a couple of these, from memory it's U62 near the fan connector. Pin 5 should be 8v. remove the cover, then next time it happens check pin5.

    Peter.
    Please search this forum and our Website for your TiVo questions before starting a new thread. Thanks!

  3. #53

    US TiVo in Australia losing sound

    Hi guys,

    Thanks for looking into resolving this issue.

    I have a TiVo modified for PAL using the "Mark 2" sound mod (MSP3410D chip) which is losing sound. On average, it's once a day; sometimes every few days, sometimes a few times a day. The TiVo is still responsive when the sound is gone, so obtaining logs is easy.

    The TiVo was delivered with OzTivo v1.4 installed. This was upgraded using rsync/upgrade_oztivo to 1.6.2. Aside from replacing the startup animation to get rid of the choppy sound, it's stock standard running version 3.2 of palmod as is currently distributed.

    Can you advise which palmod binary is the best to try to diagnose this? The PAL-I (post 36) and NZ ones (post 49) provided recently in this thread don't sound right for use in Australia.

    Here's a copy of everything PALMOD related from /var/log/kernel

    Code:
    [TiVo [p0] ~]# grep -i palmod /var/log/*
    /var/log/kernel:Feb  4 15:42:54 (none) kernel: PALMOD: Sound standard 0x03 was detected 
    /var/log/kernel:Feb  4 15:42:54 (none) kernel: PALMOD: Stereo sound detected (channel=28, value=65507, threshold=16) 
    /var/log/kernel:Feb  4 15:42:57 (none) kernel: PALMOD: Sound standard 0x03 was detected 
    /var/log/kernel:Feb  4 15:42:57 (none) kernel: PALMOD: Stereo sound detected (channel=2, value=65530, threshold=16) 
    /var/log/kernel:Feb  4 15:42:58 (none) kernel: PALMOD: Sound standard 0x03 was detected 
    /var/log/kernel:Feb  4 15:42:58 (none) kernel: PALMOD: Stereo sound detected (channel=7, value=65517, threshold=16) 
    /var/log/kernel:Feb  4 15:43:01 (none) kernel: PALMOD: Sound standard 0x03 was detected 
    /var/log/kernel:Feb  4 15:43:01 (none) kernel: PALMOD: Stereo sound not detected, switched to mono (channel=9, value=0x000a, threshold=16) 
    /var/log/kernel:Feb  4 15:43:03 (none) kernel: PALMOD: Sound standard 0x03 was detected 
    /var/log/kernel:Feb  4 15:43:03 (none) kernel: PALMOD: Stereo sound detected (channel=7, value=96, threshold=16) 
    /var/log/kernel:Feb  4 17:54:58 (none) kernel: PALMOD: Sound standard 0x03 was detected 
    /var/log/kernel:Feb  4 17:54:58 (none) kernel: PALMOD: Stereo sound not detected, switched to mono (channel=10, value=0x0005, threshold=16) 
    /var/log/kernel:Feb  4 18:29:58 (none) kernel: PALMOD: Sound standard 0x03 was detected 
    /var/log/kernel:Feb  4 18:29:58 (none) kernel: PALMOD: Stereo sound detected (channel=7, value=8345, threshold=16) 
    /var/log/kernel:Feb  4 23:54:58 (none) kernel: PALMOD: Sound standard 0x03 was detected 
    /var/log/kernel:Feb  4 23:54:58 (none) kernel: PALMOD: Stereo sound detected (channel=10, value=65529, threshold=16) 
    /var/log/kernel:Feb  5 01:49:58 (none) kernel: PALMOD: Sound standard 0x03 was detected 
    /var/log/kernel:Feb  5 01:49:58 (none) kernel: PALMOD: Stereo sound detected (channel=2, value=47, threshold=16) 
    /var/log/kernel:Jan  1 00:00:24 (none) kernel: PALmod: in rc.arch loadMpegOutput  
    /var/log/kernel:Jan  1 00:00:24 (none) kernel: cat: /etc/palmod.conf: No such file or directory 
    /var/log/kernel:Jan  1 00:00:24 (none) kernel: PALMOD: Migrate old tuner type of 1 to tuner/freq values 
    /var/log/kernel:Jan  1 00:00:24 (none) kernel: PALMOD: Tuner type=1 
    /var/log/kernel:Jan  1 00:00:24 (none) kernel: PALMOD: Frequency table=0 
    /var/log/kernel:Jan  1 00:00:24 (none) kernel: PALMOD: MSP3410D chip detected 
    /var/log/kernel:Jan  1 00:00:24 (none) kernel: PALMOD: Using tuner type 1 
    /var/log/kernel:Jan  1 00:00:24 (none) kernel: PALMOD: Horizontal resolution=544 
    /var/log/kernel:Jan  1 00:00:24 (none) kernel: PALMOD: Horizontal shift=195 
    /var/log/kernel:Jan  1 00:00:24 (none) kernel: PALMOD: S-Video saturation=101 
    /var/log/kernel:Jan  1 00:00:24 (none) kernel: PALMOD: S-Video brightness=125 
    /var/log/kernel:Jan  1 00:00:24 (none) kernel: PALMOD: S-Video contrast=67 
    /var/log/kernel:Jan  1 00:00:24 (none) kernel: PALMOD: Composite saturation=101 
    /var/log/kernel:Jan  1 00:00:24 (none) kernel: PALMOD: Composite brightness=125 
    /var/log/kernel:Jan  1 00:00:24 (none) kernel: PALMOD: Composite contrast=67 
    /var/log/kernel:Jan  1 00:00:24 (none) kernel: PALMOD: A/V input audio level=25 
    /var/log/kernel:Jan  1 00:00:24 (none) kernel: PALMOD: Tuner saturation=101 
    /var/log/kernel:Jan  1 00:00:24 (none) kernel: PALMOD: Tuner brightness=125 
    /var/log/kernel:Jan  1 00:00:24 (none) kernel: PALMOD: Tuner contrast=67 
    /var/log/kernel:Jan  1 00:00:24 (none) kernel: PALMOD: Tuner audio level=25 
    /var/log/kernel:Jan  1 00:00:24 (none) kernel: PALMOD: Luminance delay=0 
    /var/log/kernel:Jan  1 00:00:24 (none) kernel: PALMOD: Stereo detection threshold=16 
    /var/log/kernel:Jan  1 00:00:24 (none) kernel: PALMOD: RF Output channel=60 
    /var/log/kernel:Jan  1 00:00:24 (none) kernel: PALMOD: register_chrdev successful 
    /var/log/kernel:Jan  1 00:00:24 (none) kernel: PALMOD Version 3.2 loaded successfully 
    /var/log/kernel:Feb  5 10:12:10 (none) kernel: PALMOD: No TV sound standard was detected, default to B/G Dual FM 
    /var/log/kernel:Feb  5 10:12:10 (none) kernel: PALMOD: Stereo sound not detected, switched to mono (channel=2, value=0x0000, threshold=16) 
    /var/log/kernel:Feb  5 11:24:58 (none) kernel: PALMOD: Sound standard 0x03 was detected 
    /var/log/kernel:Feb  5 11:24:58 (none) kernel: PALMOD: Stereo sound detected (channel=9, value=65517, threshold=16) 
    /var/log/kernel:Feb  5 16:36:31 (none) kernel: PALMOD: Sound standard 0x03 was detected 
    /var/log/kernel:Feb  5 16:36:31 (none) kernel: PALMOD: Stereo sound detected (channel=10, value=75, threshold=16) 
    /var/log/kernel:Feb  5 16:36:34 (none) kernel: PALMOD: Sound standard 0x03 was detected 
    /var/log/kernel:Feb  5 16:36:34 (none) kernel: PALMOD: Stereo sound detected (channel=9, value=111, threshold=16) 
    /var/log/kernel:Feb  5 16:36:35 (none) kernel: PALMOD: Sound standard 0x03 was detected 
    /var/log/kernel:Feb  5 16:36:35 (none) kernel: PALMOD: Stereo sound detected (channel=7, value=70, threshold=16) 
    /var/log/kernel:Feb  5 16:36:45 (none) kernel: PALMOD: Sound standard 0x03 was detected 
    /var/log/kernel:Feb  5 16:36:45 (none) kernel: PALMOD: Stereo sound detected (channel=9, value=65482, threshold=16) 
    /var/log/kernel:Feb  5 16:36:46 (none) kernel: PALMOD: Sound standard 0x03 was detected 
    /var/log/kernel:Feb  5 16:36:46 (none) kernel: PALMOD: Stereo sound not detected, switched to mono (channel=10, value=0x0009, threshold=16) 
    /var/log/messages:Feb  5 10:11:45 (none) Stats: palmod                  9880   0 (unused) 
    /var/log/messages:Feb  5 10:11:45 (none) Stats: fpga7114              146620   0 [palmod] 
    /var/log/messages:Feb  5 10:11:45 (none) Stats: i2c                    10368   0 [palmod pxmpegdecode therm fpga7114] 
    /var/log/messages:Feb  5 10:11:45 (none) Stats: 125 palmod 
    [TiVo [p0] ~]#
    Cheers!

  4. #54
    Join Date
    May 2004
    Location
    Wellington, NZ
    Posts
    477
    Quote Originally Posted by ScoobyD00 View Post
    Can you advise which palmod binary is the best to try to diagnose this?
    Your existing binary (the official OzTivo one) looks like it will be fine to diagnose the issue.

    Quote Originally Posted by ScoobyD00 View Post
    Here's a copy of everything PALMOD related from /var/log/kernel
    The logs show that the tuner is failing to lock onto a stereo signal and is falling back to mono... so if you are getting no sound then it seems that either there is no sound at all, or the fallback to a mono signal is not working correctly. I know that Channel 10 does have a weak signal in some areas of Australia. If you can keep a record of which shows are recorded without sound (or just the start/stop time along with the Channel number) and then try and match that information to that found in the logs then you may be able to diagnose the situation further.

    Code:
    /var/log/kernel:Feb  4 17:54:58 (none) kernel: PALMOD: Sound standard 0x03 was detected 
    /var/log/kernel:Feb  4 17:54:58 (none) kernel: PALMOD: Stereo sound not detected, switched to mono (channel=10, value=0x0005, threshold=16)
    Cheers![/QUOTE]

  5. #55
    Quote Originally Posted by thomson View Post
    The logs show that the tuner is failing to lock onto a stereo signal and is falling back to mono... so if you are getting no sound then it seems that either there is no sound at all, or the fallback to a mono signal is not working correctly.
    I'm suspecting the latter. Using the tuner in my TV instead of through the TiVo shows all channels have sound at the time of the failure (and all bar channel 2 with stereo sound).

    Another point of interest is when the sound disappears, changing channels on the TiVo doesn't make a difference (if it was just one channel, this should resolve it); the unit will not recover until it's rebooted. It's still able to play user interface sounds though.

    Quote Originally Posted by thomson View Post
    I know that Channel 10 does have a weak signal in some areas of Australia. If you can keep a record of which shows are recorded without sound (or just the start/stop time along with the Channel number) and then try and match that information to that found in the logs then you may be able to diagnose the situation further.
    No problems -- I'll keep an eye on this.

    Just for fun, is there an easy way to lock it to mono only to see if it's the mono fall back with the problem?

  6. #56
    Join Date
    May 2004
    Location
    Wellington, NZ
    Posts
    477
    Quote Originally Posted by ScoobyD00 View Post
    Just for fun, is there an easy way to lock it to mono only to see if it's the mono fall back with the problem?
    Not that I can think of... although disconnecting the antenna briefly during a signal change may do it? You may also wish to try the palmod in post 49 of this thread to see if it helps (then I could compare the differences between the two sets of code).

  7. #57
    Join Date
    Nov 2005
    Location
    Brisvegas, QLD
    Posts
    10

    Bugger...

    ... it's happened to me again.

    See post here.
    Cods.

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