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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: weGuru on April 03, 2006, 02:53:24 AM

Title: Only Mono Sound
Post by: weGuru on April 03, 2006, 02:53:24 AM

Hello!

I have a Amiga 1240T with 32mb ram that i use for games, music  and internet. I used had a disk crash and had to reinstall OS 3.9.

But when i try to play mods etc i only get mono sound. I tried with a new RCA Cable with no luck. If i just switch places of the White and Red cable i get another sound...Weird..

What to do...Bohoo....

I use Eagleplayer to play mods and Octamed to Make mods

Title: Re: Only Mono Sound
Post by: -BobW- on April 03, 2006, 03:10:59 AM

I had similar problems once and found that something was shorting on the Motherboard shielding.  I removed the top shield and now the sound works fine.

Another symptom was the computer would reset if I lifted up in the power cord or RCA cables.

Title: Re: Only Mono Sound
Post by: weGuru on April 03, 2006, 12:08:56 PM

My Amiga is in a Tower..

I tried to measure around to see if i found something shorting out.But no luck..

Title: Re: Only Mono Sound
Post by: motorollin on April 03, 2006, 12:18:24 PM

When you say it is in mono, do you mean that only one of the speakers is producing sound (i.e. only one of the two stereo channels) or that both the left and the right channels are coming out of both speakers?

--
moto

Title: Re: Only Mono Sound
Post by: weGuru on April 03, 2006, 12:28:52 PM

what i mean is when i play a 4 channel mod..I only get 2 channels....So i guess there is some miscomunication between ahi and octamed/eagleplayer...Weird...

Title: Re: Only Mono Sound
Post by: motorollin on April 03, 2006, 12:31:40 PM

So you are expecting 2 channels in the left speaker and 2 in the right speaker, but you only get 2 of the channels from one of the speakers? Does this only affect AHI apps?

--
moto

Title: Re: Only Mono Sound
Post by: weGuru on April 03, 2006, 12:47:20 PM

Just like that yes

This affects all but games....
Looks like there is a volume problem in the Amiga...So the output wich is silent is muted of something

Title: Re: Only Mono Sound
Post by: motorollin on April 03, 2006, 12:50:24 PM

So software which uses Paula directly (not AHI) work ok? If that's the case then the problem is AHI not the Amiga.

--
moto

Title: Re: Only Mono Sound
Post by: weGuru on April 03, 2006, 01:09:25 PM

But Octamed doesn't use AHI does it? I maps Audio directly to paula....
So weird it shouldn't work if there is a AHI problem

Title: Re: Only Mono Sound
Post by: motorollin on April 03, 2006, 01:12:51 PM

Dunno, haven't used OctaMED in ages. What I can say is that if the sound works correctly if you boot a game from floppy, then the problem is not with the hardware.

--
moto

Title: Re: Only Mono Sound
Post by: weGuru on April 03, 2006, 03:41:48 PM

Jsut did some more testing....It seems when i plugg inn the right RCA then it only plays 2 of 4 channels....Then if i unplugg it it plays all 4 channels out of the left rca

Title: Re: Only Mono Sound
Post by: motorollin on April 03, 2006, 04:35:53 PM

Does it do this in games also? (i.e. if you boot a game from floppy)

--
moto

Title: Re: Only Mono Sound
Post by: weGuru on April 03, 2006, 07:58:50 PM

The sound is weird in games also....just tried a few and soun d effects isn't working etc....

And even demos is weird...Desert Dream etc....

Title: Re: Only Mono Sound
Post by: motorollin on April 03, 2006, 09:03:48 PM

That is pretty weird. Does look like a hardware thing if it does it in games too  :-(

--
moto

Title: Re: Only Mono Sound
Post by: weGuru on April 03, 2006, 11:01:01 PM

I hate to change mainboard....So if anybody have a good idea pls tell me....