SAA7210 to PCM56, a Dutch-American connection

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#168
It works Rfbrw, now listening to it.

BUT: have huge cracks on R channel, suppose 1 dac maybe faulty.
Also hear huge crackling noises with full scale outputs eg hard dynamic pulses, and base drum on R.
Sound As far i can say till now: its better then my first try out, but has larger problems too. I can not play fully modulated music, its distorting heavily.

Tomorrow i will redo the PCM56 wiring, and put them on the logic. Swapping of dac doesn't change so the wiring must be faulty of R dac.

I found a track with deep bass but not very loud, bass is deeper then with my previous try out, and it smokes allready my fully modded, separate clocked & dem reclocked TDA1541/SAA7220 cd304mk2
 
#172
It must be the logic. I recognise the same sound as when i took DATA from a particular tap from shift register of 1st circuit i used. There is an overlap or timing error DATA to LE in one channel. Have build 2 circuits by now, this is not a coincidense.

What i could do: invert clock to both PCM's and see what happens. The timing will be moved then 1/2 clockcycle.
 
#173
I think I know what is wrong. It could well be the same thing that eluded me for days when I tried using the PCM63 in nos. I'll check the timing diagrams and get back to you. One thing though, I would expect a problem with the left channel if it is.
 
#174
:bawling: My non os Sony player still sounds a little warmer and more liquid and sweet like honey :bawling:

Reasons could be:

Single chips in Sony vs. parallel chips in my DAC
No-brickwall op amp GIC filter vs. passive brickwall in my DAC
Better transport/direct connection to DAC chips in the Sony.
Deglitcher in the Sony... :bigeyes:

Though I couldn't see any glitches in my DAC and distortion is very low.
 
#175
One thing though, I would expect a problem with the left channel if it is
Click to expand...

Rfbrw, you just posted while i was testing: just listened wich channel distorts with a test CD, it is Left.
Played 400Hz sinus, sounds distorted too on left, Right channel is good.

Tried to invert clock: silence on both channels, but could try something else.

Pitty that i can not "show" the Nonos PCM56 to the listeners tonight.
 
#177
tubee said:
Played 400Hz sinus
Click to expand...
A sinus is an air-filled cavity in the dense portions of the skull bone, behind and above the nose. I fail to see how it can be 400 Hz.

Oh wait, you must mean 400 Hz sine.

Come on, English isn't that hard. ;P

[Edit:] Added emoticon to avoid further misunderstanding of intention.
 
#180
tubee said:
It must be the logic. I recognise the same sound as when i took DATA from a particular tap from shift register of 1st circuit i used. There is an overlap or timing error DATA to LE in one channel. Have build 2 circuits by now, this is not a coincidense.

What i could do: invert clock to both PCM's and see what happens. The timing will be moved then 1/2 clockcycle.
Click to expand...


Try taking clock output from pin 3 or pin 5 of IC4 in rfbrw's schematic.
 
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