Strange... I'm still on 1.03 (it was working with my Amanero since the bug was for SPDIF) and I thought the clicking was notably less (absent except for two situations).
One of the loud clicks happen when you're quickly switching tracks and searching within a track. (quite a rare scenario to be doing this, so I'm not too bothered)
The other is a tad more annoying to users like me who pool some favorite tracks together regardless of albums and set it to random. Pops occur when the tracks switch from DSD to PCM... otherwise I don't hear them on normal usage. That said, there is a small 2-3 secs silence on start of DSD tracks for me.
In my short 2-3 hours of listening time over the weekend, I thought the onboard DSD conversion matched up pretty well to Foobar's SACD plugin up to DSD 256 (Just tested DSD 512 for the fun of it and that had no sound).
It turned out that my PC was acting up.. One reboot fixed the issue.
It didn't help that I was doing the testing without actually listening to what the DAM was outputting. 😛 Lesson learned..
On the EU webshop there is a 0.05% rev 3 version.
Is this, as the 0.02% version, the new design with additional capacitors and two rows of resistors of per ladder side?
Hi all,
two things ....
- First i have done the "16 caps mod" (16 x Nichicon Aluminium Organic Polymer Capacitors 16V 330uF) on a board from the first version. As Rodeodave says: "They are definitely making a difference (subjectively)." 😀
- Second, i found a pic on my HDD which was named as "tl431v5plw_-_100uF-16V.jpg". Can someone say something to this, thanks?!
Ok, found it ... VRef Mod
two things ....
- First i have done the "16 caps mod" (16 x Nichicon Aluminium Organic Polymer Capacitors 16V 330uF) on a board from the first version. As Rodeodave says: "They are definitely making a difference (subjectively)." 😀
- Second, i found a pic on my HDD which was named as "tl431v5plw_-_100uF-16V.jpg". Can someone say something to this, thanks?!
An externally hosted image should be here but it was not working when we last tested it.
Ok, found it ... VRef Mod
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Nice !
Objectively too 🙂 (lower noise floor in ltspice)
For the v1 boards:
official vref mod
lowresmod
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Is the transistor mod (BC550/560) can co-exists with official vref mod? Or will it be further improved?
Thanks
@Søren,
another playground with problems.
My third dam1021-05 (sn 000257) with an really old fw (thing was 080) has played without problems and after i updated to 104 it lost the lock each second.
My other updated dam1021-02 (sn 000464) plays as expected without these problems in the same config.
Config: Mac mini - WaveIO (latest FW) - dam
Any hints for me? Can you send me an old fw for testing? Can i do something to locate the problem?
another playground with problems.
My third dam1021-05 (sn 000257) with an really old fw (thing was 080) has played without problems and after i updated to 104 it lost the lock each second.
Code:
# set
Conspeed = 115200
Volume = +00
Filter = Linear
Mode = Normal
# filters
04 Bypass FIR1, 384 Ksps
08 Linear Phase FIR2, 384 Ksps, 0-76 Khz -1 db, 192 Khz -100 db
29 DC Blocking IIR, 384 Ksps, 2 Hz HP 1st order
30 Deemphasis IIR, 384 Ksps, 50/15 uS
# exit
L384
L000
L384
L384
L000
L384
L000
L384
L384
L000
L384
L000
L384
L000
L384
L000
L384
L000
L384
L000
L384
L000
L384My other updated dam1021-02 (sn 000464) plays as expected without these problems in the same config.
Config: Mac mini - WaveIO (latest FW) - dam
Any hints for me? Can you send me an old fw for testing? Can i do something to locate the problem?
It is an improvement to Official mod vref. Two components are removed and put one transistor. Co-exists with 16 cap.
Thanks.
I see from a later post that one resistor has to be short, is that true or I just leave it untouched?
Attachments
Actually, I believe that picture was someone's suggestion to get around the startup issues that some are having after they modify the board where the vref rails aren't rising at the same time.
I actually have to try this mod on one of my boards (which has this issue) so I remember it 🙂
@Søren,
Have you a hint for me? # 4611
The privat seller wont take him back because i made a fw upgrade, it / he is so stupid. 😡
Did you try firmware 0.99?
Yes, that is the earliest that i had. It is the same behavior but not so often, think so around all 5 seconds.
I would check your I2S source to make sure the signal getting to the dam1021 is good enough to keep a solid lock on. 384k is asking for a lot if you are using poor interconnects.
I connect AES SPDIF to two dam dacs in parallel running balance mode. I use SPDIF1+ and SPDIF1- and GND as connection. It can lock the signal in normal case, however, when I switch on/off the lights in home such as the lamp in toilet or kitchen, it will loss signal and muted for 1/2 second until it can relock again.
Does anyone know what would be the cause and how to solve it? Thanks.
Does anyone know what would be the cause and how to solve it? Thanks.