Problema: Áudio distorcido

Schütz

Schütz

New Member
Utilizo há bom tempo um splitter 1x2, com um decodificador na entrada e saídas com um televisor e o notebook (Com Vídeo Capture externo e USB). Funcionou perfeitamente até que, de repente, o áudio do OBS degradou, mostrando apenas ruído alto variando no Mixer de áudio, Dispositivo de captura de vídeo. Mudei o dispositivo externo e o splitter, com o mesmo resultado. Quando se usa apenas o notebook, o áudio fica normal. Alguma sugestão...?
 
A

AaronD

Active Member
https://translate.google.com on the original post says:
I've been using a 1x2 splitter for a long time, with a decoder at the input and outputs with a television and notebook (with external Video Capture and USB). It worked perfectly until suddenly the OBS audio degraded, showing only loud noise varying in the Audio Mixer, Video Capture Device. I changed the external device and the splitter, with the same result. When using just the notebook, the audio is normal. Any suggestion...?
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Sounds to me like something suddenly decided to be encrypted, and the receiving device just blindly took what it got as if it were still in-the-clear.

Or, something that I fixed a year or two ago on a Linux rig, is that it was using an old version of one of the libraries, which took the bottom 16 bits of a 24-bit interface, and ignored the top 8 bits. It worked as long as I kept the input volume way down, but as soon as I exceeded -48dBFS or so, it would fill the meter already and distort horribly. The solution there was already done; I just had to get a newer version of that library.
 
Schütz

Schütz

New Member
AaronD said:
https://translate.google.com na postagem original diz:


Parece-me que algo de repente decidiu ser criptografado, e o dispositivo receptor simplesmente pegou o que recebeu como se ainda estivesse limpo.

Ou algo que eu consertei há um ou dois anos em um equipamento Linux, é que ele estava usando uma versão antiga de uma das bibliotecas, que pegava os 16 bits inferiores de uma interface de 24 bits e ignorava os 8 bits superiores. Funcionou enquanto eu mantivesse o volume de entrada bem baixo, mas assim que eu excedia -48dBFS ou algo assim, ele enchia o medidor e distorcia horrivelmente. A solução já estava feita; eu só tinha que obter uma versão mais nova daquela biblioteca.
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Aaron, saberia indicar possíveis bibliotecas específicas que poderiam resolver minha questão...?
 
A

AaronD

Active Member
Schütz said:
Aaron, saberia indicar possíveis bibliotecas específicas que poderiam resolver minha questão...?
Click to expand...
If it's a different problem, then it's not going to help. It boils down to a single file that has the problem in it - libzita-alsa-pcmi.so.0.4.0 - that is symlinked on Linux from /lib/x86_64-linux-gnu/libzita-alsa-pcmi.so.0. The updated (and fixed) one is libzita-alsa-pcmi.so.0.6.1 or later. Delete the original symlink, and make another one with the same name to point to the new file. I have to do that every time I update my Ubuntu Studio Linux box because the updates keep putting the old one back, so I added all of that to the end of my update script. Problem solved!

Of course, that only works on Linux, which is the only place I know that has that specific problem in that specific way. If you're different, then it won't work for you.
 
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