Hi,

when playing a sound on my SAM, I get a mean crackle noise before playback starts. Is this due to AHI Settings, any Idea how to set it up proberly ?

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@gerograph
Hm, I do not think it has something to do with Sam or in general with Hardware. As long as I use Soundcards on any of my Amiga together with AHI, there was a clipping here and there while starting or switching a soundfile. I think AHI is the problem, perhabs the way it opens the driver or something like that. But only while playing something, recording is just fine :O)

@Psycreator

Hmm, and here i thought something was wrong with my SAM, had some constant static noise in the beginning too but that was fixed by using http://www.os4depot.net/index.php?function=showfile&file=audio/misc/mixer.lha

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@gerograph

Don't have this problem myself.
Where does your sound come from?
Speakers connected to Sam rear audio for instance.

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@TiredofLife

Speakers connetcted to rear audio of SAM... Speakers work just fine on windows...
But anyway should I just leave AHI Settings like they were by default ???

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@gerograph

Will look at my settings when I get home, will then post them here.

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@gerograph

This was normal on my AmigaOne when using the AC97 audio driver.
It doesn't happen with my M-Audio sound card driver though.

Is the AC97 driver used on the SAM?

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@logicalheart

Note there isn't such a thing as 'the' AC'97 driver really. An AC'97 always needs a controller chip, for example, a VIA686B, FM801 or emu10kx. Or in the case of the SAM, a CS4281.

Different people can have different problems. Yaroze' problem was apparently due to some input of the AC'97 not being connected and not 'terminated' properly which gets solved by starting the mixer, which in turn sets the (monitoring) volume of these unused inputs.
Aside that, you can easily have clipping with AHI mixing routines indeed.

Last edited by DaveAE on 07-Jan-2009 at 10:52 AM.

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@DaveAE

Thanks for the explanation Dave.

I've gone back to the VIA-AC97 driver on my AmigaOne, and it performs better under OS4.1 than it did on 4.0.

Consequently after updating to OS4.1, my M-Audio 5.1 card makes crackling noises. Does anyone know why this would happen? I've tried two different M-audio cards, different slots, different AHI config., all with the same results, so I know the card is fine.

Perhaps I should try a card with a different Envy chipset than the M-Audio 5.1?

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@logicalheart

If you are having issues with the same Envy24HT driver that you were using under OS4.0, something got messed up in 4.1. When exactly do you get crackling noises, when you play something and don't touch/download anything or when playing and simultaneously doing something else?

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@DaveAE

Aha! There is something wrong with my AmigaOne :(
The crackling noise got worse when I copied files from the CD to hard drive.
Then the noise completely went away, and at the same time my network transfer speed improved.

I'm wondering if my motherboard fix (DMA?) is failing.
Anyway I've moved my disk and CD drives to a PCI card.
I'll use this configuration and see if the problem returns.

Thanks for the input. - Lars

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@logicalheart
Aha! This was from having a USB joypad plugged in!?
I've disconnected it and the Audio is working fine now.

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