Doing this I get pretty much a straight line, a constant uncorrected drift in one direction.
I think the ideal solution would be to analyze the incoming clock over some time and then set the internal clock to the average value and apply only minimal corrections. The clock source I use (Lavry Gold MK3 AD converter) really shouldn't drift much in and of itself.
Yes - improve as time goes by. Maybe an adjustment every 10 minutes would be necessary in the end... but then there might be an sudden temperature change and you would get a jump... but one could measure and compare much more often than one adjusts in order to detect these kind of events and start do more rapid changes if needed.
//
//
Good evening to all!
The DAM1021 itches me a lot (to be part of a preamp). Being a greenhorn, I'm not sure about more or less every single detailed aspect of a dac, TBH)...
Apologies for Question nr 100'000. But:
- I'd need a USB to I2S adapter, the one recommended by soekris is out of stock/EOL. are there good alternatives? (Generally: What are important features of an adapter to work well with the 1021?)
The power-requirements seem to be quite moderate... a simple tiny transformer would be sufficient? (this would be something like a 15V 10VA)
Thank you for hints and tips!
The DAM1021 itches me a lot (to be part of a preamp). Being a greenhorn, I'm not sure about more or less every single detailed aspect of a dac, TBH)...
Apologies for Question nr 100'000. But:
- I'd need a USB to I2S adapter, the one recommended by soekris is out of stock/EOL. are there good alternatives? (Generally: What are important features of an adapter to work well with the 1021?)
The power-requirements seem to be quite moderate... a simple tiny transformer would be sufficient? (this would be something like a 15V 10VA)
Thank you for hints and tips!
That was swift, cool thank you!
BTW: I just found the hifiduino-files (again, asked already some time ago...), and most if not all questions are answered there!
BTW: I just found the hifiduino-files (again, asked already some time ago...), and most if not all questions are answered there!
The JLSounds board works wonderfully with the dam1021, highly recommended.
If you were to buy a new dam1021 today, it would be a rev7 board. These need DC power, not just AC, +/- 9VDC is optimal. See here: https://www.diyaudio.com/community/...e-24-bit-384-khz.259488/page-508#post-6632431
One more question: What does "necessary" mean in this context? If the delta between the incoming clock and the DAM1021's exceeds 1/16 Hz? Or if the FIFO-buffer is in danger of over-/underrunning? Or something else?
Guys, I may have broken something in my system... There might've been a static discharge somewhere in the room, nothing too out of the ordinary, but now the I2S input from Amanero produces only loud crackle/noise in both channels (I have a dual-mono setup). Tried to test the Toslink/Coax inputs fed by a E-MU 0404, but it was just silence. The signal lock is fine. What might've been damaged?...
On a side note, I'm now running my HD800 via the E-MU 0404 headphone out, which isn't terribly underpowered and I'm using a very low output level anyway. After all these years I was expecting that the E-MU 0404 would sound exactly the same as dam1021 (so it couldn't have been just wishful thinking or my imagination), but the difference was night and day?!?! Granted I had balanced outputs from the dam1021 dual-mono and only single-ended from the E-MU 0404, but the output impedance matches (E-MU 0404 is something like 20ohms), and the E-MU is more than loud enough.
This is absolutely insane. How did no one catch this in any of the double-blind DAC tests? Is it just because I've been listening to the same pieces on the same DAC for years, so much so that I've genuinely learned the dam1021 sound signature?
I hate to say this but if my dam1021 is beyond salvage I might actually want to order new ones knowing how they sound lol.
On a side note, I'm now running my HD800 via the E-MU 0404 headphone out, which isn't terribly underpowered and I'm using a very low output level anyway. After all these years I was expecting that the E-MU 0404 would sound exactly the same as dam1021 (so it couldn't have been just wishful thinking or my imagination), but the difference was night and day?!?! Granted I had balanced outputs from the dam1021 dual-mono and only single-ended from the E-MU 0404, but the output impedance matches (E-MU 0404 is something like 20ohms), and the E-MU is more than loud enough.
This is absolutely insane. How did no one catch this in any of the double-blind DAC tests? Is it just because I've been listening to the same pieces on the same DAC for years, so much so that I've genuinely learned the dam1021 sound signature?
I hate to say this but if my dam1021 is beyond salvage I might actually want to order new ones knowing how they sound lol.
Should I try to update the firmware? Haven't done that in a few years. Also some of the capacitors on my UltraBiB psu are maybe a year over their expected lifespan. I have standard polymer caps (that should last decades) ready to replace the special audio ones because I stopped believing that they could matter... Could this be a PSU issue even though the boards are powered on and can lock on to the incoming signals?
Edit: so apparently I can still access uManager which is good I guess. The power supply/input stage voltages are also nominal. What's going on?...
Edit: so apparently I can still access uManager which is good I guess. The power supply/input stage voltages are also nominal. What's going on?...
Last edited:
It wasn't clear of you preferred the to listen with EM-U or not...
Have you ever managed to get sound out of the 1021 using s/pdif
If everything was connected as usual and you didn't touch any parts inside its unlikely that there has been a static electricity accident.
Measure and verity all DC feeds with an AVO?
//
Have you ever managed to get sound out of the 1021 using s/pdif
If everything was connected as usual and you didn't touch any parts inside its unlikely that there has been a static electricity accident.
Measure and verity all DC feeds with an AVO?
//
I mean static discharge shuts off my monitor's HDMI connection on a regular basis - I don't even have to touch the PC, just a discharge inside the room will disable the connection for a few seconds.
I do have everything grounded to a tee. The incoming USB connection to the Amanero is not even connected to the Amanero ground and the shielding is only terminated at my PC. The Amanero itself is powered by a separate supply.
So what's happening is I can make out a little bit of the music with I2S/Amanero. Maybe it's just extremely bad clipping for some reason. I'm not sure what clipping sounds like so can't say for sure. Could I have fried a chip or something?
Re: The EM-U is just horrible compared to the dam1021. Muddy, weak, lacks spaciousness and presentation, etc. I guess you could sum it up as "unnatural". The EM-U is powered by the AK4396 which I remember to be reasonably good, though I bought it mostly for measurement.
All DC feeds seem perfectly nominal. I have tested SPDIF years ago up to 192khz. Not sure if I've tested it with the E-MU
I should also add that on the audiozen LCD display, the SPDIF signal is displayed with the correct sampling frequency when it's hooked up to the E-MU0404. I can actually toggle sampling frequency using the clock signal from my old laptop on the E-MU control panel. The dam1021 displays the sampling freq correctly all the way up to 192Khz so the connection is there. It's just being extremely, extremely quiet in S/PDIF mode...
Last edited:
Here's my setup again... I'm more or less out of ideas, but I can try updating the firmware tomorrow if anyone thinks that might change things. I also bought a toroidal replacement for the blue noisy xformer that would fit on top of the larger toroidal, but never got around to installing it...
Just read up on the rev7 changes, so tempting lol... but to be fair I'll probably never find the time to rewire everything. Also @soekris why is the bridge rectifier and electrolytics still there if rev7 only accepts DC?
Just read up on the rev7 changes, so tempting lol... but to be fair I'll probably never find the time to rewire everything. Also @soekris why is the bridge rectifier and electrolytics still there if rev7 only accepts DC?
Attachments
Last edited:
I suggest you make a minimal config for the DAM i.e. just a basic DC feed and s/pdif in and check the unbuffered outputs for the result.
//
//
The fact that I can't get any output in SPDIF mode can't be caused by the buffer stage bc I get noisy output in i2s mode. It's pretty basic rn. Are you worried that the Amanero is contaminating the isolated input stage, which results in the spdif not working?
F it, I'll update the firmware
Last edited: