Re: [hatari-users] Minor Problems with Falcon Emulation

[laurent.sallafranque@xxxxxxx]

Hi all,

A quick message from hollidays just to say that the problem also appears on Linux.
It seems to be a general bug.

Regards from Spain

Laurent


----- Mail original -----
De: "Douglas Little" <doug694@xxxxxxxxxxxxxx>
À: hatari-users@xxxxxxxxxxxxxxxxxxx
Envoyé: Samedi 9 Août 2014 11:47:36
Objet: Re: [hatari-users] Minor Problems with Falcon Emulation


Ok glad you're getting somewhere - although I wasn't trying to say that 50khz sounds better than 11khz (obviously it does!). 


Rather there is a bug in Hatari somewhere (at least in the Windows version - not sure about the others) which causes desync between the audio stream from the emulated Falcon and the audio output from the PC. The desync causes 'chopping' of the sample at regular intervals and it sounds like crunchy audio. 


Toggling the khz setting seems to cause it to resync (or get worse). So it's not the khz setting that is the fix, but the toggling effect. i.e. it's possible to get crunchy audio at 50khz too - but toggling can cancel it. 


I hope that makes sense. 


Still, you may not be getting the same problem as me. It is true that a slow CPU can't emulate the audio accurately - and power saving mode definitely slows down the emulator. I've noticed this while using it. 


I have a reasonably fast, 4-core i7 with power saving off, and I still get crunchy audio sometimes until I use the toggling trick. 


Best, 
D. 

















On 9 August 2014 10:41, Ingo Schmidt < lists@xxxxxxxxxxx > wrote: 


Hi, 



I recommend just recording the audio into some sampling software (e.g. Audacity in loopback mode). This way it's easy to see how broken the audio can get. 
Ok, thanks, will give that a go eventually. 



Having said that it's not always wrong - it varies. Try toggling the sound quality setting on the audio dialog between 11khz and 50khz several times to see if the noise increases/decreases at random. 

If the noise level seems to change or clear up then you're experiencing the same problem we are. If the noise level remains the same, it is perhaps something else. 
I have done some experiments: 
- Desktop-PC with fairly decent AMD CPU: perfect sound 
- HTPC with energy saving Intel CPU: noisy sound 

And you are right: It does vary when I change the frequency. Best results so far for me was to have 50066 Hz on the desktop PC. 

Looks like my HTPC needs a CPU upgrade :) 

Cheers, Curly060 =;->