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 Post subject: Realtek 5686
PostPosted: Tue Jun 25, 2024 10:31 am 
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Joined: Tue Mar 17, 2009 2:56 pm
Posts: 4200
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i just got this :)
will it work for mpx...

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 Post subject: Re: Realtek 5686
PostPosted: Tue Jun 25, 2024 12:28 pm 

Joined: Fri Jan 21, 2022 9:51 pm
Posts: 31
That looks identical to my Realtek ALC4042, so that should work great! In case it is in the near vicinity of strong EM-fields (i.e. TX-antenna), you can solder in a simple filter on the board like so:
https://imgur.com/a/JTKt0Ox
This will prevent dc-shifts on its output due to RF-rectification, since it is a capless design.

ST cal. params in my case:
Lows tilt +45 µs
Highs dropoff 1.800


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 Post subject: Re: Realtek 5686
PostPosted: Tue Jun 25, 2024 1:53 pm 

Joined: Fri Nov 23, 2012 4:34 pm
Posts: 217
I am interested to know what sort of output voltage is possible from these types of DACs. Are you able to make 3.5 V peak to peak?


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 Post subject: Re: Realtek 5686
PostPosted: Tue Jun 25, 2024 9:47 pm 
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Joined: Tue Mar 17, 2009 2:56 pm
Posts: 4200
Quote:
I am interested to know what sort of output voltage is possible from these types of DACs. Are you able to make 3.5 V peak to peak?
I tested quickly on one not so great transmitter, and looks fine, plenty of level, tilt is minimal, slight correction for 'highs' needed, but that also might be because this transmitter.

KS, MME, DS, Wasapi, all working, didn't have time to try Asio/for all.

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 Post subject: Re: Realtek 5686
PostPosted: Tue Jun 25, 2024 10:41 pm 

Joined: Fri Jan 21, 2022 9:51 pm
Posts: 31
According to the datasheets of both the ALC5686 and the ALC4042, max output voltage for these DAC's sits just at about 1 Vrms (about 2,8 Vpp). For the ALC4042 I even measured a bit lower than that.
ALC5686 datasheet
ALC4042 datasheet

Looks like the 5686 even has a slightly better SNR!

Would be very interested in Bojcha's attempt to get it working with ASIO4ALL. I'm not familiar with ASIO just yet, but I would surely like to get latency down.


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 Post subject: Re: Realtek 5686
PostPosted: Tue Jun 25, 2024 10:45 pm 
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Joined: Sun Dec 23, 2018 7:44 pm
Posts: 867
Location: Texas, USA
Quote:
Would be very interested in Bojcha's attempt to get it working with ASIO4ALL. I'm not familiar with ASIO just yet, but I would surely like to get latency down.
Please, anybody, correct me if I'm wrong, but I was always under the impression that ASIO4all was a KS wrapper to make it work over the ASIO API(APO?); as opposed to a native ASIO device that can be controlled more directly by Windows. Thus the latency still revolves around KS capabilities, no?


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 Post subject: Re: Realtek 5686
PostPosted: Tue Jun 25, 2024 10:59 pm 

Joined: Fri Jan 21, 2022 9:51 pm
Posts: 31
Quote:
Quote:
Would be very interested in Bojcha's attempt to get it working with ASIO4ALL. I'm not familiar with ASIO just yet, but I would surely like to get latency down.
Please, anybody, correct me if I'm wrong, but I was always under the impression that ASIO4all was a KS wrapper to make it work over the ASIO API(APO?); as opposed to a native ASIO device that can be controlled more directly by Windows. Thus the latency still revolves around KS capabilities, no?
For what it's worth; I asked ChatGPT and the short answer is that ASIO4ALL is a KS-wrapper indeed and just provides ASIO functionality, but without the low-latency advantage of a native ASIO-driver (i.e. no direct HW-access).


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 Post subject: Re: Realtek 5686
PostPosted: Wed Jun 26, 2024 12:23 am 

Joined: Wed Feb 11, 2015 8:51 pm
Posts: 9
Quote:
Image


i just got this :)
will it work for mpx...
Greetings, please where did you buy it?


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 Post subject: Re: Realtek 5686
PostPosted: Wed Jun 26, 2024 12:58 am 
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Joined: Tue Mar 17, 2009 2:56 pm
Posts: 4200
Quote:
Greetings, please where did you buy it?
Local dealer here, but AliExpress is full of them..
https://www.aliexpress.com/w/wholesale- ... l.search.0

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 Post subject: Re: Realtek 5686
PostPosted: Wed Jun 26, 2024 1:05 pm 

Joined: Fri Nov 23, 2012 4:34 pm
Posts: 217
Thank you @Bojcha and @Pethunia. This is useful feedback. At the price point it might be worthwhile getting one and just testing it out. Would be interesting to know if there are any implementation differences between manufacturers.


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