XMOS + DF1706 / PMD200 bit perfect volume control USB to DOR DOL PCB - diyAudio
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Old 11th July 2014, 03:19 PM   #1
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Default XMOS + DF1706 / PMD200 bit perfect volume control USB to DOR DOL PCB

I am thinking of this combination xmos+df1706/pmd200 on one PCB
There are two advantage:
1)The volume control is done on the digital filter rather than on XMOS (bit perfect volume control is achieved and it is essential for highest quality audio after trying it with es9018k2m
2)The PCB output DOR DOL, it can be used to interface with dac like PCM1704 / PCM1702 directly

For the more advance version, with isolator and oscillator on the clean side to reclock the DOR DOL signal.
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Old 11th July 2014, 03:38 PM   #2
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Count me in for one of these, such a fantastic idea! PMD 200 is the better choice IMHO.
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Old 11th July 2014, 07:14 PM   #3
glt is offline glt  United States
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Is there a source for the PMD200?
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Old 11th July 2014, 08:10 PM   #4
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As far as I know it can be programmed into a new carrier, it wasn't a specific IC as the PMD100, so a Xilinx or Altera can do... If you understand what I mean...
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Old 13th July 2014, 03:21 AM   #5
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Quote:
Originally Posted by glt View Post
Is there a source for the PMD200?
Yes, it's hard to find source of PMD200, DF1706 is easier
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Old 13th July 2014, 03:24 AM   #6
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Quote:
Originally Posted by Ivan Petrov View Post
As far as I know it can be programmed into a new carrier, it wasn't a specific IC as the PMD100, so a Xilinx or Altera can do... If you understand what I mean...
According to the PMD200 datasheet searched from the internet, PMD200 should contains all the feature of PMD100 plus something extra. But it should need to try before confirm
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Old 13th July 2014, 03:40 AM   #7
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I am also thinking of a XMOS USB to DOR DOL PCB without digital filter IC Does anybody know is there something similar already exist
The final DAC can be used as the following way
1)directly Non-oversampling to PCM1704/1702 DAC chip
2)digital filter done in the XMOS(depend of the digital filter complexity, higher speed xmos may be needed)
3)digital filter can also be done in the playback software(but different operation system will have different sound depend on the player)
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Old 16th July 2014, 07:23 AM   #8
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For me it makes much more sense to have it without a fixed filter on the board and to be able to use different software filters either on the computer or the XMOS, digital filtering has seen some serious advancements in recent years and that has made more difference than just swapping DAC chips. Please make it easy to improve, I am sure it will have a great success.
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Old 16th August 2014, 08:33 PM   #9
olev is offline olev  Estonia
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This sounds like a perfect fit for Audio-GD gear! If you do release it it will go straight to my dual PCM1704 DAC
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Old 17th August 2014, 10:20 PM   #10
Eldam is offline Eldam  France
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ok for AD1862 ?

A specific for TDA1541A in simultanous mode ?

Could be very nice...
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