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      /  Sam460 - very annoying hiss on audio
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Everblue 
Sam460 - very annoying hiss on audio
Posted on 31-Dec-2012 15:38:05
#1 ]
Cult Member
Joined: 24-Sep-2006
Posts: 678
From: Amigaland

Lately I have been doing some audio driver testing with M3x from Acube (as reported in another thread), and it seems that it will be fixed soon.

One thing, that somehow, will not be fixed (because it may not be driver related), is a VERY ANNOYING "hiss" in audio while music is being played.

Some points:

1. I can hear this "hiss" both when playing MP3/online radio AND Audio CD (the latter indicates that it may not be a driver related problem - I guess)

2. I have tried with more than 1 speaker setup - same result

3. I have tried with both the connector on the back of the motherboard, and on the front of the case - same result

4. What really worries me about this that it seems that no one else has reported this problem

5. Just for information, I am currently using the on-board VGA

Is there a solution for this, or at least some things to test out before asking for a board replacement?

Thanks for any suggestions.


Edit: A 6570 is on the way to me

Last edited by Everblue on 31-Dec-2012 at 04:00 PM.

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Everblue 
Re: Sam460 - very annoying hiss on audio
Posted on 31-Dec-2012 16:59:25
#2 ]
Cult Member
Joined: 24-Sep-2006
Posts: 678
From: Amigaland

Update:

This is what it sounds like (recorded directly from SAM to PC)

http://everblue.retrogm.org/upload/Janet_Jackson_Runaway_SM502_Test_Driver_Sample.m4a

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NutsAboutAmiga 
Re: Sam460 - very annoying hiss on audio
Posted on 31-Dec-2012 17:06:07
#3 ]
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Joined: 9-Jun-2004
Posts: 12609
From: Norway

@Everblue

If its not driver letter you better send it back on warranty.
Lett Acube have look at it.

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djnick 
Re: Sam460 - very annoying hiss on audio
Posted on 31-Dec-2012 19:27:48
#4 ]
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Joined: 11-Jun-2003
Posts: 946
From: space

I would check AHI outputs too. Setting one audio output with 2 plusses (++) in its name solved bad sound output... Also check settings in player you use.

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broadblues 
Re: Sam460 - very annoying hiss on audio
Posted on 31-Dec-2012 19:51:11
#5 ]
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Joined: 20-Jul-2004
Posts: 4443
From: Portsmouth England

@Everblue

I can't hear anything in that recording I would describe as 'hiss' I can hear some clipping like distortion though.

I presume if you have a sata CD you are playing it through AHI? Or is the a direct connection to the sound card? (much less common with modern CDRom drives)

If the former then you are still running through AHI and thus it may still be driver related.


I get some interference from my monitor, that may be a possibilty, it's a lot more noticable on my SAM flex, with the on board sound than with the sound card.

To reduce the likely hood of interference, make sure your case / powersupply is properly earthed etc.

Last edited by broadblues on 31-Dec-2012 at 07:52 PM.

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graffias79 
Re: Sam460 - very annoying hiss on audio
Posted on 31-Dec-2012 19:58:51
#6 ]
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Joined: 20-Apr-2005
Posts: 133
From: Madison, WI

@broadblues

I recorded that sample. It was done to show an example of the output from an unreleased test driver. I don't think it's supposed to be out in the wild.

I've been working with m3x on both PCIe testing and now SM502 audio driver testing.

Everblue asked me to see if I had the same problem of "hissing", and I recorded the output from my SAM to show exactly what it sounded like. I also recorded a sample of the original driver as released in a recent OS4.1 update playing this exact sound clip to compare and contrast with this sample shown here recorded using a test patched driver.

Jamie

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Everblue 
Re: Sam460 - very annoying hiss on audio
Posted on 1-Jan-2013 7:55:22
#7 ]
Cult Member
Joined: 24-Sep-2006
Posts: 678
From: Amigaland

@djnick

I've tried a million settings in AHI and in the player, no difference at all.

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Everblue 
Re: Sam460 - very annoying hiss on audio
Posted on 1-Jan-2013 7:56:42
#8 ]
Cult Member
Joined: 24-Sep-2006
Posts: 678
From: Amigaland

@broadblues

Quote:

I presume if you have a sata CD you are playing it through AHI? Or is the a direct connection to the sound card? (much less common with modern CDRom drives)

If the former then you are still running through AHI and thus it may still be driver related.


Yes you are right regarding this. But the absolute majority of people do not get this problem, so I don't find this acceptable.

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Everblue 
Re: Sam460 - very annoying hiss on audio
Posted on 1-Jan-2013 9:06:40
#9 ]
Cult Member
Joined: 24-Sep-2006
Posts: 678
From: Amigaland

@djnick

Quote:

djnick wrote:
I would check AHI outputs too. Setting one audio output with 2 plusses (++) in its name solved bad sound output... Also check settings in player you use.


Tried all that doesnt work.

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Fairdinkem 
Re: Sam460 - very annoying hiss on audio
Posted on 1-Jan-2013 9:29:12
#10 ]
Cult Member
Joined: 23-Feb-2010
Posts: 516
From: Victoria, Australia

@Everblue

Dude I would contact Acube and get it sorted out, this should not be so painful for you if they can't trouble shoot it for you then they should replace the board for you.

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Everblue 
Re: Sam460 - very annoying hiss on audio
Posted on 1-Jan-2013 9:32:20
#11 ]
Cult Member
Joined: 24-Sep-2006
Posts: 678
From: Amigaland

@Fairdinkem

Yes, actually I just did just ask for that. Let's see what they say.

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Fairdinkem 
Re: Sam460 - very annoying hiss on audio
Posted on 1-Jan-2013 9:41:53
#12 ]
Cult Member
Joined: 23-Feb-2010
Posts: 516
From: Victoria, Australia

@Everblue

It may be worth your while contacting hyperion directly and seeing what there recommendations are also as they are supporting this hardware with there product.

I assume you have looked here http://forum.hyperion-entertainment.biz for support with your issue? Specifically under this forum Platform: AmigaOne 500 and Sam series?

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Everblue 
Re: Sam460 - very annoying hiss on audio
Posted on 1-Jan-2013 11:03:34
#13 ]
Cult Member
Joined: 24-Sep-2006
Posts: 678
From: Amigaland

@Fairdinkem

Acube are responsible for the driver not Hyperion

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broadblues 
Re: Sam460 - very annoying hiss on audio
Posted on 1-Jan-2013 11:06:40
#14 ]
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Joined: 20-Jul-2004
Posts: 4443
From: Portsmouth England

@Everblue

Does the sound work in linux?

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Everblue 
Re: Sam460 - very annoying hiss on audio
Posted on 1-Jan-2013 11:26:57
#15 ]
Cult Member
Joined: 24-Sep-2006
Posts: 678
From: Amigaland

@broadblues

Don't have Linux and that's not what I bought it for :p

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ChrisH 
Re: Sam460 - very annoying hiss on audio
Posted on 1-Jan-2013 11:41:13
#16 ]
Elite Member
Joined: 30-Jan-2005
Posts: 6679
From: Unknown

@Everblue
On my Sam440 I had problems with loud "hissing" until I was able to use Mixer to mute all the sound *inputs*. Basically the Sam440 had poorly isolated sound inputs, which the Sam dutifully amplified for you to hear. The simple solution was to mute them all (except maybe the CD sound input, if you had it connected).

Maybe the same applies to the Sam460? I don't know if Mixer supports the Sam460 yet though.

Last edited by ChrisH on 01-Jan-2013 at 11:41 AM.

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broadblues 
Re: Sam460 - very annoying hiss on audio
Posted on 1-Jan-2013 12:05:01
#17 ]
Amiga Developer Team
Joined: 20-Jul-2004
Posts: 4443
From: Portsmouth England

@Everblue

Quote:

Don't have Linux and that's not what I bought it for :p


The point is that if it works in Linux, then it's just a driver issue, not hardware.

Although before installing linux to test, it's worth making sure the onboard sound is suported in Linux.

Anyone know?

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Spectre660 
Re: Sam460 - very annoying hiss on audio
Posted on 1-Jan-2013 12:18:49
#18 ]
Elite Member
Joined: 5-Jun-2005
Posts: 3918
From: Unknown

@broadblues

I have not been able to get onboard sound to work.
I am not an expert though.


Quote:

broadblues wrote:
@Everblue

Quote:

Don't have Linux and that's not what I bought it for :p


The point is that if it works in Linux, then it's just a driver issue, not hardware.

Although before installing linux to test, it's worth making sure the onboard sound is suported in Linux.

Anyone know?

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noXLar 
Re: Sam460 - very annoying hiss on audio
Posted on 1-Jan-2013 12:21:20
#19 ]
Cult Member
Joined: 8-May-2003
Posts: 733
From: Norway

@Everblue

I remember when i configure the sound i had to reset the sam460 every new try to the new settings, have you done this?

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Everblue 
Re: Sam460 - very annoying hiss on audio
Posted on 1-Jan-2013 12:33:38
#20 ]
Cult Member
Joined: 24-Sep-2006
Posts: 678
From: Amigaland

@noXLar

Yes I reset.

I did try mixer too, no difference.

Last edited by Everblue on 01-Jan-2013 at 12:34 PM.

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