Hi:

I have pretty much everything working on my Mythtv box even the remote, and I got an acceptable picture quality. Now the audio sounds horrible. Basically I have a jumper cable going from my tuner card to the line in input in my sound card. Now... If I connect the sound drirectly to the tuner card the volume will be too low, the only way to get volume level is to amplify it using the computers sound card, now, it has low sound quality, the audio sounds like a badly tunned radio station... you do not hear any base and you hear that shhh shh shhh at the end of every word, and you hear a lot of noise from the hard drive... rrrrrrrrr rrrrrrrrrr rrrrrrrr (like a helicopter) I have a PCTV tuner card and these are the setting I used to get the sound amplified....



Does anybody have any suggestion with this issue. Thanks in advance.

If you push all of the input/output levels to 100% you're very likely to get distortion. Knock the master and/or pcm back to 95% or lower, and check that your capture levels aren't pegged too (If you're using a PVR card this requires changing the config in your recording profiles.)

TJC:

I'm sorry to say that that did absolutely anything. Sound qality did not improve at all, if anything it sounds a little bit lower now. Do you have any more ideas?

Does anybody have anymore ideas?

Not being stupid here, but just check your jumper cables are correctly pushed home, I recall a strange effect I would get if my headphone jack was not pushed fully home on my hifi. If you have been moving stuff around possibly something has become loose.
On the jumper cable, do you have a spare one you could try? In addition, check the cable routing, if it's near electrical noise sources, you will pick up interference.

You say Could you explain in a bit more detail what you were doing in the two states. Thanks.

Bruce S.

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Updated 2019/10/26: AthlonII X2 265 Gigabyte GA-970A-DS3P
16Gb PC 1866 DDR3, 500GB+2TB+4TB SATA HDD,
SATA DVD-RW Asus DRW-24D5MT , NVIDIA GeForce GT1080
Hauppauage Nova-T 500, Nova-T LinHes R8.6.1

Hi Bruce, thanks for your help, I know you are not being funny but I highly doubt that that is the answer... let me check it right now while I type this...

1) I disconected the jumper cable and connected the speaker cable right to the tunner card, the sounds pretty much the same exept with lower volume and some bass and the video and audio are out of sync, sice it is the real live sound and not the delayed sound of mythtv.

2) I put it back to the way it was, the volume is higher, with lots of trebble and no bass at all, and the volume is higher, you can also hear this noise wich seems to be coming from the hard drive, rrrrrrrr rrrrrrrr rrrrrrr

As far as the explanation about the jumper cable, I use a cable that goes from the "Audio Out" jack of the tunner card and the Audio In (the blue jack on the computer's audio card not the red/microphone one) that makes the computer sound card delay the audio comming from the tunner card and sync it with the video and also it amplifies it. If I disconnect this cable I would get no audio at all, since the computer does not grab audio straight from the tunner card, it only grabs video (don't know why).

I assume that your speakers are amplified? If they are, check your treble/bass and volume settings on them.
As an outside thing, if you wiggle the jumper cable, are you getting any changes? I might suggest trying out a spare cable, if you have one, even if the wiggling doesn't change anything.
Are you able to play back any other audio OK, like from a DVD or an MP3?
Scratching my head here, possibly if change the slots your cards are in, but this is more of a wild guess than the cable.
The only other things I can suggest at the moment are noting down the sound settings for the recording profiles (Utilities/Setup->Setup->TV Settings->Recording Profiles->Software Encoders (v4l based)), the General sound setup (Utilities/Setup->Setup->General->3rd Screen).
Also what devices and settings aumix is saying (exit the front end, right click on the desktop, Apps->Sound->aumix).
This info might give some clue, if not to me, perhaps to someone else.

Bruce S.

_________________
Updated 2019/10/26: AthlonII X2 265 Gigabyte GA-970A-DS3P
16Gb PC 1866 DDR3, 500GB+2TB+4TB SATA HDD,
SATA DVD-RW Asus DRW-24D5MT , NVIDIA GeForce GT1080
Hauppauage Nova-T 500, Nova-T LinHes R8.6.1

HI bruce like I said on my other post, I was able to get the volume lower with what you suggested, now I need to reduce the trabble and increase the bass a little, do you, or anybody in the forum, know how to acomplish this???

First off, can you rip a CD and play it? Does it sound okay?

If not, it is the audio out on your soundcard that is causing problems. About the only option to play with here is the volume. If that doesn't work, it might just be a bad sound card. Maybe you can beg/borrow another one to test and see if it is better. If you can upgrade to SPDIF it will probably make a world of difference.

If CDs play fine, the problem is in either the capture card audio out or the audio card IN. This is a little more difficult as there are probably two volume controls to adjust. Also, there may be different settings for audio/phono/headphone that may affect things. You want it all set to audio if you have such settings. However, if CDs play fine (i.e. system does sound okay), I would seriously consider getting a better capture card that captures audio.

Allen

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ASUS AT3N7A-I (Atom 330)
TBS 8922 PCI (DVB-S2)

If the problem is on the recording side, the v4l2-ctl utility will let you fiddle with the audio capture settings depending on the capabilities of the card. However I'm not sure if MythTV will override the adjustments you make. I know that it does apply it's own volume settings at the start of each recording, but as for the rest your guess is as good as mine.

Also, try switching to dsp1 or dsp2 in mythtv-setup under your TV Tuner. I was having this problem myself; it gave me really tinny audio. At first it didn't recognize either dsp1 or dsp2, but after a reboot it gave me the option and seems to be working okay now.

I had to solve some other problems with alsaconf and alsamixer, but I think just the capture card settings in mythtv-setup should do fine.

Thanks a lot for your help but if I change to dsp1 or 2 I get no sound.

I had the same problem as my audio sounded horrible on a new box I just built. I went to

Utilities/Setup->Setup->TV Settings->Recording Profiles->Software Encoders (v4l based)

and selected the livetv and when I got to the audio section I changed it from MP3 to uncompressed and it fixed the sound. If I go back to MP3 it gives me an error and crashes the backend (maybe someone could give me some insight on what the issue could be).

I hope this helps.