Ok, I have read a bit more. The only reason that justifies asio4all is to
combine a Asio card with no WDM driver and a WDM card with no Asio driver.
Using asio4all without any other Asio device is just an unnecessary
software between Mixxx and the soundcard.
Using two WDM soundcards via asio4all may crackle.

Am 14.09.2017 3:30 nachm. schrieb "Daniel Schürmann" <dasch...@mixxx.org>:

Ah, ok I understand. Asio4all makes the things worse. We already recommend
to not use it at all. I think we already have a paragraph for it so we can
remove the crackling issue from the asio4all unrelated paragraphs. And give
an advise "If you think you need asio4all, use WDM"


Am 14.09.2017 12:03 nachm. schrieb "Be" <b...@gmx.com>:

We still have the issue with ASIO on Windows only supporting one sound card
at a time. ASIO4ALL can present an aggregate device, but in this case, if I
understand correctly, Mixxx's clock sync code is irrelevant. Users have
reported crackling using ASIO4ALL this way ( https://mixxx.org/forums/viewt
opic.php?p=30983#p30983 ).


On 09/14/2017 03:29 AM, Daniel Schürmann wrote:

> Hi Be,
>
> Thank you for your latest changes.
> Here some comments:
>
>
> and you cannot hear the arrangement of different sounds in space.
>>
>
> and you lose the stereo effect, the arrangements of ...
>
> However, this increases latency and there may be crackling on one sound
>> card.
>>
>
> Also, using multiple sound cards increases latency and there may be
>> crackling on one sound card, so
>>
>
> It was a lot of work to remove the crackling in this case, so it throws a
> bad light on Mixxx if we still pretend this. Can we just remove the second
> part until we have the evidence that the cracking is still there?
>
> The only remaining issue is that Mixxx removed or duplicates stereo
> samples to catch up. You loose bit perfect but this cannot be heared. The
> same is done for example if you push the rate slider a minimal step.
>
>
> Am 11.09.2017 1:32 vorm. schrieb "Be" <b...@gmx.com <mailto:b...@gmx.com
> >>:
>
>     I have revised the table of USB sound cards on the wiki to have less
>     technical mumbo jumbo and more user friendly explanations of the
>     pros and cons of different devices. I have also removed some
>     discontinued and unpopular devices. I hope this is more useful now
>     for users considering what hardware to get.
>
>     https://mixxx.org/wiki/doku.php/hardware_compatibility#usb_sound_cards
>     <https://mixxx.org/wiki/doku.php/hardware_compatibility#usb_
> sound_cards>
>
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