[mrarroyo]

Quote:

What do you think about stepped attenuators, such as  SMT Resistor 50K Step Attenuator Volume Control  ? 
 

I just ordered to try it, at $17 including S&H it was worth the risk. Thanks.

 

[david-gao]

Quote:

pcm1792a as default works  (delta-sigma) with 64 Fs  oversampling (for 88/96 kHz  mode)
Is SMK-III   switched to 128 Fs , when input signal has 44.1/48 kHz  sample rate ?

Yes, we set the right OS mode to REG20 of PCM1792 when detect the input sampling frequency
32K------------0x02
44.1K----------0x02
48K------------0x02
88/96K--------0x00
 

 

[LeonardS]

Quote:

Where I can find this   schematic ?

 

http://www.head-fi.org/forum/thread/468719/review-hlly-dmk-iv-dac-headphone-amp-pre-amp    post #9.  Note it is of an earlier version of the dmk-iv.  apparently they are upgrading it a bit.
 
 

 

[mmx3]

File not found.
 
Quote:

http://www.head-fi.org/forum/thread/468719/review-hlly-dmk-iv-dac-headphone-amp-pre-amp    post #9.  Note it is of an earlier version of the dmk-iv.  apparently they are upgrading it a bit.

 

 

[mmx3]

someone try to install Opa2132   in SMK-III  ?
What you can say about sound with it ?
------------------
 I 'll try   opa2132, when I receive SMK-III  .   
 

 

[david-gao]

 
Quote:

someone try to install Opa2132   in SMK-III  ?
What you can say about sound with it ?
------------------
 I 'll try   opa2132, when I receive SMK-III  .   
 

We tried OPA2132 / OPA2604 / OPA627(signal to double transform) , the sound is better than OP275, Just try and you can select one which you fell good!

 
 

 

[mmx3]

>>  We tried OPA2132 / OPA2604 / OPA627(signal to double transform) , the sound is better than OP275, J
 
But OPA627 - single  OpAmp
How I can use 627 ?

 

[david-gao]

Quote:

>>  We tried OPA2132 / OPA2604 / OPA627(signal to double transform) , the sound is better than OP275, J
 
But OPA627 - single  OpAmp
How I can use 627 ?

     OPA627(signal to double transform) , there is two OPA627 in one little PCB
     
 
 

 

[mmx3]

  I have some opa627,  soic &  dip,  where I can buy  these little PCB  for it ?

 

[livewire]

http://cimarrontechnology.com/


 
Quote:

  I have some opa627,  soic &  dip,  where I can buy  these little PCB  for it ?

 

 

[mmx3]

   USB signal, received by tenor 7022,  go directly to pcm1792  or to spdif chip 9001 ?

 

[mmx3]

 
  I requested  adapters  on Ebay,   2dip --> 1dip  (for  opa627 in DIP cases),  soic --> dip,  2 soic --> 1dip   from http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=350414359241

 

[publicholiday]

how is this compared to matrix mini i dac?

 

[mmx3]

   I can't compare these DAC's  on practice test,  but
 
 "matrix mini i" has some disadvantages - re-discretization of input signals (upsampling),  non-replacable OpAmps  (op275 / opa2134),  digital volume control  in ad1955.
 
 
Quote:

how is this compared to matrix mini i dac?

 

 

[publicholiday]

upsampling supposed to sound better isnt? digital volume tends to degrade the resolution on lowest volumes?