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Old 26th October 2012, 03:41 AM   #501
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Location: Brisbane, Australia
A very BLUE AKD23P arrived at my work just now

Thanks Acko!!



Cheers,
Chris
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Old 27th October 2012, 11:27 AM   #502
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Quote:
Originally Posted by dahlberg View Post
What's the difference from the "9018" ?
So I'm quoting myself

Of cource I have read the product presentation that reveals a lesser possible
sampling frequency and a bit higher thd / dnr. The available samplingfrequency is
high enough since it's usually limited by the usb reciver anyway so that shouldn't
matter, -110 thd and -128db dnr should be more than enough as well.

Schould I be expecting a lesser soundquality with this chip ?
Are the dsp/volumecontrol funtions identical ? (seem so from the presentation).

Quote:
Requires external IV and Master Clock
Could you elaborate on clock alternatives ?
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Old 27th October 2012, 11:01 PM   #503
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Quote:
Originally Posted by dahlberg View Post
So I'm quoting myself

Of cource I have read the product presentation that reveals a lesser possible
sampling frequency and a bit higher thd / dnr. The available samplingfrequency is
high enough since it's usually limited by the usb reciver anyway so that shouldn't
matter, -110 thd and -128db dnr should be more than enough as well.

Schould I be expecting a lesser soundquality with this chip ?
Are the dsp/volumecontrol funtions identical ? (seem so from the presentation).



Could you elaborate on clock alternatives ?
Did you mean what is diff between 9016 and 9018? There was also some discusion around there of 9023.


9016 has less of the proprietary features in terms of jitter rejection and the price of the chip is half of the cost of a 9018 so the value you place on those changes can only really be determined by the user IMO. Basically yes, it will be measurably less than the performance of a well built 9018; it may well perform better than a poorly built 9018 though IMO.

Clock options depend on your transport and your choice of synch or asynch clocking. If you have a usb transport with good onboard clocks you may chose to use that and use synchronous clocking.

I suspect that I have created more questions than answers for you unfortunately ...


Cheers,
Chris
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Old 28th October 2012, 05:40 AM   #504
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Default AKD23P

Just finished putting my AKD23P in a temporary case with a few other bits and pieces

Need a shorter u.fl cable for mclk, the ones for signal weren't long enough to reach the mclk, probably only short by ~10mm or so, next bigger size I had was a 200mm long monster.
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Last edited by hochopeper; 28th October 2012 at 05:43 AM.
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Old 28th October 2012, 06:26 AM   #505
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Location: Sydney
I know those regulators =p

Is that one of qusp's octopus transformers or did you get one made?

Looks excellent!
I'm thinking of doing a similar thing and putting a small bal-se or bal-bal wire in my old sabre dac to turn it into a glorified soundcard.
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Old 28th October 2012, 06:49 AM   #506
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Quote:
Originally Posted by nattonrice View Post
I know those regulators =p

Is that one of qusp's octopus transformers or did you get one made?

Looks excellent!
I'm thinking of doing a similar thing and putting a small bal-se or bal-bal wire in my old sabre dac to turn it into a glorified soundcard.

Yeah I got a one off tx of my own made up by sumr, made one mistake and ended up with one of the secondaries being a bit higher than I'd like and the LT1085 I use for the WaveIO runs a bit hot even with the larger heatsink on it, not the end of the world and all runs at safe temps how it is. Considering I ordered the tx with a totally different DAC and without FIFO in mind it still turned out pretty much perfectly and will use all of the secondaries.

Yeah I thought you'd like those regs The extra LT1963 reg board will power FIFO later on and the other half of the seemingly half populated Wire PSU board is set up as another rectifier+filter and will probably power a sjostrom super reg for isolated side of the FIFO.

I grabbed a spare set of shoelaces from qusp for analogue signal wire too!

Oh and the JG jfet buffer+filter for the dac output still to come yet too

I'll be taking this as it is to the Brisbane head-fi meet so hopefully will be able to compare to whatever others bring along to that, should be interesting! It has just taken the place of a usb powered 'open source usb interface' that had the same 9023 dac chip and I was using an O2 amp on the output. WaveIO->AKD23P->Wire are a fairly substantial improvement over that setup.

Last edited by hochopeper; 28th October 2012 at 06:53 AM.
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Old 28th October 2012, 07:26 AM   #507
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Cool!
Later on I'm gonna try to book some flights for the week before Christmas to Brisbane.
I plan to catch up with Jeremy and if you're available I'd love to hear it =D
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Old 28th October 2012, 09:11 AM   #508
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Quote:
Clock options depend on your transport and your choice of synch or asynch clocking. If you have a usb transport with good onboard clocks you may chose to use that and use synchronous clocking.

I suspect that I have created more questions than answers for you unfortunately ...
I belive that I would be forced to go for asyncronus mode. The coming setup will be a bit to complex for syncronus mode.
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Old 28th October 2012, 12:45 PM   #509
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I am not familiar with any of the asynch clocking options since I have never investigated them. Would be worth asking Acko about the 'Turbo Master Clock' though. I am not sure if it is able to work in asynch mode, its description has reference to modifications needed on transport end, which may or may not suit your application.

@nattonrice, sounds like a great plan!
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Old 28th October 2012, 02:53 PM   #510
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From what I can se from the picture there is an option for on-board XO as well as an external one.
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