PCM-58 DAC

[percival007]

Hello All,

I have a couple of PCM-58's and want to make a DAC with them.
The Datasheet ( https://www.alldatasheet.com/datasheet-pdf/pdf/93900/BURR-BROWN/PCM58P.html ) shows the first 4 Bits are adjustable, but can be left alone if wanted.
I have these chips in my Pioneer PD-73 and Pioneer only have the MSB adjustable.

Has anyone any experience with this chip and whether it is worth adding the extra adjustments? Is it audible?
Although the 73 wasn't the flagship player, it was fairly high up the chain but Pioneer only used a cheap single turn pot for the MSB adjustment so can't have been too concerned over it drifting over time etc etc.
I have never adjusted my player so don't know whether it can be observed/heard if mis-aligned.

Any thoughts would be appreciated.

P.

 

[lcsaszar]

I haven't worked on the PCM-58, neither don't know if MSB adjustment can be heard, but I created some tracks for the adjustment:
https://www.diyaudio.com/community/threads/dac-linearity-test-cd.113620/
We are dealing with +/-1 LSB signals, and you have to amplify it, and monitor your work on an oscilloscope.
My further experiments:
https://www.diyaudio.com/community/threads/static-measurement-of-dac-linearity-possible.406689/
and:
https://www.diyaudio.com/community/threads/tda1541a-reducing-dnl.414159/
(This is about the TDA1541A, but the principle of adjustment is the same).

 

[lcsaszar]

With my test tracks you should see something like this. Track #15 is MSB, track #14 is MSB-1, etc.

 

[percival007]

''File not found'' ''Error 404'' when I click on the link in your post on the other thread (?)

 

[lcsaszar]

https://www.diyaudio.com/community/threads/dac-linearity-test-cd.113620/page-3#post-3029143
https://www.diyaudio.com/community/threads/dac-linearity-test-cd.113620/page-3#post-3029145
You'll need track 12, 13, 14, 15 only. Build a low noise x100 amplifier for proper visualization.