Is this just me, or have you other people noticed this bug with AHI? Or is it a MorphOS bug?'

Well, there is a metallic diskant sound wich is destroying the sound here. I don't know if you hear it, but its at diskant sounds and most of the music where you notice that. Is either trance with strange long synth fades or when you watch a divX movie wich is encoded bad.

That metallic sound is so strange, because I've never heard it on my PC, my Paula Amiga or thru my DelfinaDSP Zorro 2 soundcard for my A4000.

It's only thru AHI and someone should tell the AHI author about this bug. And yes, this is a seriouse bug if someone in the future will use MorphOS as proffesional soundstudio.

This metallic is only at the diskant end sound. Not bass at all.

Just sit and listen and you should notice it.


Please report if someone of you have the same AHI problem. It dosen't help with Gain in Kaya neither. SongPlayer can in someway reduce that sound, but also got problems, wich is bad, bad, bad :(

Please help me if you can,...


Regards,
Michal, www.amigaworld.org

hello

i've noticed it too, on my peg1, but did not notice it
until i increased the volume.

Same here, but only if the volume of the source is low, mostly dvd's or divx movies. The reason why I haven't bought any music-dvd's 'till now

Diskant??

Yes, there is a metallic sound in AHI. If you listen and listen to the diskant. Thats the opposite of bass or trebble.

I am not so good in English.

I am actually listening to mp3 thru ANR now and hear the metallic sound without problem and the metallic sound dosen't dissapear if I use the Unit option neither.

AHI is the reason for that sound to come. On heavy bass music you don't recognize it, but music where its calm synth fades or music wich uses lots of diskants. The sound is very noticeable.

So, there is not just bad divX movies that causes this, but also all music in PegasosII wich runs thru AHI gets the same irritating noice :/ This should be fixed.

Regards,
Michal, www.amigaworld.org

Regards,
Michal, www.amigaworld.org

Hmm, I'll try to see if I hear anything here.

Nope, it sounds good here. I only get a bit bad sound if I go over the 0dB level in AmigaAMP here, but that's normal I assume.

Edit: Just tried with ANR too, and get no distortion. And I've tried high volumes and a bunch of different music styles.

I recommend either -

1. Getting a sound card for better volume boost

2. Using proper amplification/speakers with on board sound. If you have cheap speakers with little amplification it will sound "tinny"

Best bet is to run peg sound output to a nice a/v system or reciever

magnetic

Oki.

Just let it get this straight.

Now I am a musician person and I've been using Amiga since 1988. The best ever sound experience from that part, was from my DelfinaDSP. You can really hear how good the DelfinaDSP is in crystal clear sound. Very nice.

If someone here could tell me their sound setting, wich claims that there is no disaknt metallic sound. Please give it.

My speakers is very good and haven't failed me once. Its not from them at all, because this is a AHI problem. Conneting these to my PC or to my DelfinaDSPz2 soundcard. Then that metallic sound is gone. Or even when connecting them to my Nokia N-Gage wich also plays mp3s.

Regards,
Michal, www.amigaworld.org

Ok, I just tried playing the same mp3 file on both my Pegasos and my PC, with the same stereo set. And If you listen closely to high frequency stuff, you can hear the distortion. It's not easy to hear unless you concentrate, but it's there, like a silent dizzy echo of the treble sounds.

@mag:

best is to use digital out and digital equipment

but that's EXPENSIVE!

hi morphdelf,
i have not listened much to music on my peg I yet, but this sounds very interesting.
did you notice this metallic sound only during replay of sounds or does this sound occur in recordings from the external input, too? eg, if you record some music from aux and replay it on your amiga/pc, can you hear distortions, too?

i find this to be particularly important for further sound works. perhaps i should stick to my a1200 with melody, which has a great recording quality.

kind regards

After some more testing, I found out that there is a form of "base" metallic/flattening distortion, wich is difficult to notice if the volume of the source is high (e.g. a "loud" mp3) but all to clear if the volume of the source is low (like with most dvd's). I'm not using any gain (in the AHI-settings) and use my stereo for sound output (amplifying done by the receiver). So the question is if there is a problem with AHI or with the quality of the AC97 onboard chip. If it is because of the hardware, then adding a nice Soundblaster Live might solve the problem (like Magnetic suggested). Anyone out there with a Soundblaster who is willing to share their findings?

Thanks for noticing it.

It is AHI as the same metallic sound apears on Classic Amigas when playing thru AHI.

Regards,
Michal, www.amigaworld.org

I can confirm that the sound from the pegasos2-AC97 is being slightly distorted if the volume of the mixer is set to >90%

I recommend setting the master volume to around 75%, then use an external amplifier for additional volume boost.

Hehe, resurrecting an old thread,

I now can confirm that the problem lies indeed with the onboard AC97 soundchip. After installing a Soundblaster Live, the problem is gone (and boy, does it sound sweet ).

Just in case anyone needed to know.

Stevo said...
I now can confirm that the problem lies indeed with the onboard AC97 soundchip.

Yes, the SoundBlaster Live! clears up quite a few sound distortions in all applications, not just MorphOS. It also improves MOL sound as well.

Harry

Maybe if some of you who have this problem could put up some
sample/mp3 clip where the problem is noticeable?

Personally I haven't noticed any such problems, except if I raise the
volume too much for whatever amplifier/headphones/whatever. Trying to
play something on the internal speaker, for example.

@Stevo

IF ONE can get ALSA to recognize the card under MOL. It's recognized fine under everything else, but not undre MOL.

Harry

Yes....the worst sounds that i ever heard is the Peg2-AC97 one....even the 8bit paula was better than this!

When comparing MOD players (especially AHX player) Paula is much much better, but Peg-AC97 is better when playing MP3s.