sounds over amped unless i click spdif ? (1 Viewer)

[russnw]

Hi Again,

Another question for you as im still trying to setup me media centre properly. Its to do wioth audio.

I have an SBX-FI hooked up to a yamaha av receiver via analogue (only reason i dont use digital is because i play games on here too and eax 5.1 will only work over analogue). I use Nvidia Purevideo for my vid and aud decoder.

Whichever decoder i choose, it seems that if i select '3front 2rear (5.1)' the sound comes out of the speakers distorted like mad, the distortion you would expect to hear as though the sound is being pre-amped to hell before leaving the speakers, like the speakers are about to blow.. this is at very very low volumes too. So, to remedy this i have to click the Spdif button, then the sound comes out just fine. Am i meant to be using Spdif anyway ? connecting to the receiver over analogue ?

Once im happy with this, i turn up the sound on my dvd, when im done watching it i flick to my mp3's press play, and have my ears popped because the volume setting is so loud ! My dvd's and mp3's have a huge difference in volume settings, a comfortable setting for mp3 is too quiet when switching on a dvd and vice versa.

All volume is controlled by my receiver, media portal volume is at the top, windows wav volume is half, and master volume is half, ive played with all the settings i can do, to no avail.

Its 2:30 am, i have work in the mornin so im giving up for the night !!

Gnight,

Russell

 

[Forgotten Illustrator]

When you say “Analogue” do you mean that you are using one cable but it is one coaxial cable?
Because by this statement

i have to click the Spdif button, then the sound comes out just fine.

this sound’s like you are only using one cable. If so… you have to click SPDIF due to the fact that you’re actually using digital over coaxial.

If you need true analogue you will have too have each channel send on its own pair of wires. This will increase the work load that the computer has to do because it will have to decode DD, DTS etc instead of just sending the raw information to the receiver so it can do the work.

 

[russnw]

hi,

No, i am using true analogue, 3 3.5m jacks to 3 pairs of rca's. That why im confused that when i click spdif i get sound at all, im not connected with digital coax at all.

Ta.. Russell

 

[Forgotten Illustrator]

By the sounds of thing you are connecting these jack outputs which are meant to go to speakers direct to a rca input of your amp and as a result you will be overdriving your pre-amp. Thus getting clipping of your audio and giving you the sound which you describe.

Can you do any jack sensing with your sound card software? So that you can configure it to rca.

Do you have the input on your receiver setup for what you are trying to do?

You can also turning your volume on the computer down all the way and the slow increase it till you get some audio. This will lower the amplitude of the signal going to the pre-amp.

 

[russnw]

My amp has a section on the back called 'multichannel input' which i plugged the rca's into. On the front i have to use the selector to select the 'multichannel input', this disables any features of the amp like sound modes and effects.

Jack sensing ? im not sure what that is ? but ill have a good read through of the av receivers manual and see if it says anything about connecting a pc, it maybe ive missed a setting on the receivers menu or something.

Ive tried turning the volume on the computer to the bottom, and it still doesnt sound correct. Funny thing is though i only get the preamp overdrive horrible noise with 5.1, when i play music it comes out fine, just 5.1 audio... : /

Thanks for your time

Russ