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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: arttu80 on March 09, 2016, 07:31:43 PM

Title: Weak A4000 cd sound
Post by: arttu80 on March 09, 2016, 07:31:43 PM

Hi!

I recently got A4000/040 and ofcourse has been very pleased with this long lusted C= marvel. I connected more modern DVD/CD drive to it with internal audio cable to motherboard CN404 --->

http://www.amigapcb.org/

but when playing audio CDs I must really crank up volume knob on my amplifier to hear decently. When I run any Amiga software (e.g.games) CD sound output is much weaker compared to what is coming out of Amiga...Is there some advice to it?

Title: Re: Weak A4000 cd sound
Post by: zipper on March 09, 2016, 07:49:00 PM

You need some adjustable audio mixer.
Speculation: http://www.amiga.org/forums/showthread.php?t=19177

Title: Re: Weak A4000 cd sound
Post by: amiadudeorwat on March 09, 2016, 09:38:22 PM

It is a known issue, one theory is that so CD audio tracks in games would not drown out the SFX in games.  There is a fix but it involves replacing two resistors on the motherboard.

https://groups.google.com/forum/#!topic/z-netz.rechner.amiga.hardware/f3Lh-RwYJbU

Title: Re: Weak A4000 cd sound
Post by: arttu80 on March 10, 2016, 07:54:26 PM

Quote from: amiadudeorwat;805678

It is a known issue, one theory is that so CD audio tracks in games would not drown out the SFX in games.  There is a fix but it involves replacing two resistors on the motherboard.

https://groups.google.com/forum/#!topic/z-netz.rechner.amiga.hardware/f3Lh-RwYJbU

Thank a lot for the link. I'll try this HW hack with capacitor equipped resistors as stated in last post of that link (by Marcel).

Title: Re: Weak A4000 cd sound
Post by: BozzerBigD on March 10, 2016, 09:50:18 PM

The A4000T's AV Module handles the mixing of the CD audio and Amiga sound very well. The A4000 was always a compromised design in my view rushed out to combat VGA/SVGA PC advancements.