Hi,

Soon I'll have access to a SAM Flex so I can look at audio related problems on the SAM and possibly do bug fixes or improvements on the SAM audio driver and Mixer.

So, please post your audio related problems for the on-board SAM audio here (even if you've done so in other threads already), stating SAM or SAM Flex and OS4 version and anything you think is relevant.

Thank you!

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@DaveAE

I dont know if its an sdl_mixer issue, or a simpleplay issue, but when playing music in simpleplay, its very easy to make the audio stutter while doing gui things.. i.e. I open Filer and click the depth gadget to move it to the front or behind several other windows.. when it comes to the front, the redraw makes a tiny simpleplay stutter.. I have no idea if this is an audio driver issue, or sdl_mixer, or whatever. Please disregard if you see fit. :)

Sam440ep-667mhz + onboard audio.

@jahc

Ok, I'm not talking about sdl_mixer, but Mixer though, but I'll see if I can reproduce stutter while doing gui things. Thanks for the report! :)

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@DaveAE

yeah, sdl_mixer is probably badly named.. its more of a music replayer library for sdl.. but yes, try and reproduce the glitch. :) you can also reproduce it by holding down the right mouse button in IBrowse and changing menus fast over and over, going over the bookmarks menu fast while doing it. (if you have a lot of bookmarks anyway).

@jahc

Is it only with SimplePlay and sdl_mixer? If yes, then it's an application issue (too low priority of the audio feeding process probably).

Last edited by DaveAE on 30-Jun-2009 at 12:08 PM.

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@DaveAE

> So, please post your audio related problems for the on-board SAM
> audio here (even if you've done so in other threads already)

On the SAM440ep:
-The left and right audio channels are swaped.
-There is a constant noise in one of the channels. It gets worse when the mouse is moved.


Kind regards,

Dennis

I haven't experienced any sound problems with my SAM440ep so far.

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@A3000T

Please add the environment variable CS4281_SWAP_CHANNELS and set it to 1 for solving the channel swapping issue.

I probably can't fix noise in one of the channels, that sounds like a hardware issue.

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Audio Evolution
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@DaveAE

I have a SAM440ep...

The audio noise only comes on after Workbench is loaded (and you don't need anything playing -- you can hear the noise without any program playing sounds/music). Prior to that, all is quiet.

Would be interesting to know if Linux on SAM also shows the same audio noise issue?

@DaveAE

I don't notice any stutter with AmigaAMP. But have noticed with Tunenet more so (choppy audio that can only be fixed by stop and replay). For Tunenet, this more noticable on 4.0 on classic (with my 4000t when I start loading owb web pages and moving gui objects). This has been posted on the Tunenet post at amigans.net...

I have this noise issue when workbench started, sometimes when I play first song on Tunenet or when I play some games, for example PrBoom

My hardware is Sam Flex 800 1 GB Ram, onboard sound

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@DaveAE

I don't notice any stutter with AmigaAMP. But have noticed with Tunenet more so (choppy audio that can only be fixed by stop and replay). For Tunenet, this more noticable on 4.0 on classic (with my 4000t when I start loading owb web pages and moving gui objects). This has been posted on the Tunenet post at amigans.net...

@samo79 & @DavidAE

It think this was mentioned before - my (and others) sam440ep (no-flex) make a "crackling" sound EVERY time a program starts to play a sound, regardless which program (i.e. OS start jingle, TuneNet, Games whatever).

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@cha05e90
Quote:

It think this was mentioned before - my (and others) sam440ep (no-flex) make a "crackling" sound EVERY time a program starts to play a sound, regardless which program (i.e. OS start jingle, TuneNet, Games whatever).

The same problem exists on 800MHZ SAM Flex with 1GB memory. The scratch or pop sound occurs at the beginning of sound play. If it is a long sound or piece of music, the scratch is only heard once at the begonning and the rest of the sounplay is relatively normal. If I load a sound in Multiview, the scratch is heard the first time the sound is played and doesn't seem to occur if the sound is repeated in rapid succession. However, if I wait 15-30 sec between playing the same sound then the scratch is heard at the beginning of each sound. It is especially annoying with Instant Messaging programs like Jabberwocky that play a sound for notification that a message has arrived. Every single chat message produces a scratch sound at the beginning of the notification sound. The severity of the scratch sound does seem to vary with the type of sound played and possibly with the high frequency content of the sound.

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X1000 with 2GB memory & OS4.1FE

@DaveAE
I have *no* sound problems on my Sam440ep (original NOT flex). Well I do, but they are fixed:

1. Audio channel wrong way round are fixed with your updated sound driver & env variable.

2. The "noisy" audio is fixed by running Mixer in WbStartup, configured to silence "Monitor Aux" input (-34.5dB). I had also found "Monitor CD" input a MINOR source of noise, but I left it as I have sound connected on my CD drive (an old IDE drive connected using a SATA adapter), but perhaps it should default to silence since modern (esp SATA) CD drives do not support analogue CD audio.

I do **NOT** get any scratch or pop sound when a program begins playing a sound. NOR does TuneNet stutter under heavy CPU load. Yes, SimplePlay stutters, but I believe that is a priority issue in the SDL mixer.

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@ChrisH

I have add a Soundblaster Live! soundcard. the Sam onboard sound it´s so poor :(
Soundblaster live have better sound quality much better!!
Test it


Best Regards
Pedro Henriques

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@Xenic

I get exactly the same problem on my EP (non-Flex). Chris' Mixer solution doesn't work here.

Chris

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@Xenic

Yes, your description fits exactly to the sound "effect" i mentioned. Nevertheless I'll try Chis' workaround this weekend - hope it works.

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X1000|II/G4|440ep|2000/060|2000/040|1000

Maybe this hint don't fit here but its important to mention that the softreset (by pressing lamiga-ramiga-ctrl) don't work if sound is being played. The whole system comes to a halt and you hearing the playbuffer(?) playing it again and again (sounds like a machine-gun).

Somebody knows the background for this?

It's rarely disturbing when i'm experiement with new unfinished or buggy programs or games that used sound output and crash without stopping playing sound so im forced to do the hard-reset.

Add: Beside this problem i must determine that the soundquality is superb!

Last edited by fingus on 30-Jun-2009 at 10:29 PM.

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@ChrisH

2) That works -- Monitor AUX is the worse (high buzz). Playback PCM and Monitor PCM I notice
have some noise. I basically cranked up my stereo and the master level and then tried each
one...

So would make it sense to have the default AHI driver lower the dB automatically for AUX so that the user doesn't have to figure this out...or maybe have some new env FLAGs so don't need to run yet another "patch" in WBstartup...