Any? Almost any would do better. The RPi uses MASH technique to create clocks that are not an even multiple of FS which is basically all FS - MASH means it will flip between 2 frequencies so that he mean become what is needed.
Hows that for *jitter* ;-)
Dont use computers for audio....
//
I am done!
Chip: AD1862 N-J.
Opamp: Muses03
Caps: Elna/Nichicon/wima
LPS: LT3045 for +/-5V; UCC GR opamp based regulator for +/-12V.
The first impression:
It sounds very natural.
It shows ample details and wider soundstage.
Very enjoyable.
Weakness:
The bass is a bit shy.
The output Gain seems a bit low; my volume control is usually set at 11 o’clock for my listening comfortably. Now it has to go to 1pm position.
Is it normal? Can/should it be remedied? Just a minor thing.
The Singxer F1 has Crystek clocks of 22 & 24 MHz. I guess that’s the reason it cannot playback my 24/384 hires files-extremely distorted.
Finally I upsampled everything to only 24/192. No big deal.
Opamp:
I have OPA134, LME49710 and Muses03 in my little opamp storage box.
All are single channel, so handy and save me money.
Opa134 and LME49710 both are a bit soft with weaker bass. I can Even hear some distortion in some music!? I am not sure but don’t like the feel.
Muses03 gives me the much better punchy bass, better dynamic and very musical.
The PCB is very tight for the oversize caps. Hahaha. I survived it.
I tried muses03 in my Whammy headphone amp but did not like it. I preferred Muses01. Now muses03 have a good home!
Overall I am very surprised this vintage dac still sounds excellent.
Thanks Miro and other members.
My other DACs: (all are wonderful dacs with different sound signature)
AGD Nos19 (PCM1704)
AD1865 HAT DAC
Soekris dam1021
Chip: AD1862 N-J.
Opamp: Muses03
Caps: Elna/Nichicon/wima
LPS: LT3045 for +/-5V; UCC GR opamp based regulator for +/-12V.
The first impression:
It sounds very natural.
It shows ample details and wider soundstage.
Very enjoyable.
Weakness:
The bass is a bit shy.
The output Gain seems a bit low; my volume control is usually set at 11 o’clock for my listening comfortably. Now it has to go to 1pm position.
Is it normal? Can/should it be remedied? Just a minor thing.
The Singxer F1 has Crystek clocks of 22 & 24 MHz. I guess that’s the reason it cannot playback my 24/384 hires files-extremely distorted.
Finally I upsampled everything to only 24/192. No big deal.
Opamp:
I have OPA134, LME49710 and Muses03 in my little opamp storage box.
All are single channel, so handy and save me money.
Opa134 and LME49710 both are a bit soft with weaker bass. I can Even hear some distortion in some music!? I am not sure but don’t like the feel.
Muses03 gives me the much better punchy bass, better dynamic and very musical.
The PCB is very tight for the oversize caps. Hahaha. I survived it.
I tried muses03 in my Whammy headphone amp but did not like it. I preferred Muses01. Now muses03 have a good home!
Overall I am very surprised this vintage dac still sounds excellent.
Thanks Miro and other members.
My other DACs: (all are wonderful dacs with different sound signature)
AGD Nos19 (PCM1704)
AD1865 HAT DAC
Soekris dam1021
Attachments
Thanks abraxalito for your effort. My schematic for PCM2706 is 100% working:
PCM2706
CM102S is nice, cheap and simple. You can measure it. I am curious if it is less than 500ps
@nano35
Well done Thanks for your comparison.
in times of boredom you can try this passive bass boost
it's passive, so you may need to increase the resistor on I/V and play with different values
Well done
Thanks for your comparison. in times of boredom you can try this passive bass boost
it's passive, so you may need to increase the resistor on I/V and play with different values
increase the value of R8, R9 ... it is related to the output voltage, try 2k something (2k4, or 2k7)
Do you think that this discrete opamp could be a good option for I/v?
DIY JE-990 DOA
Could It fit in this design?
Compared with a Burson v5, is it worth it?
DIY JE-990 DOA
Could It fit in this design?
Compared with a Burson v5, is it worth it?
It is simple and proven design, it will work
for adjustment to +-12V it will be enough to reduce some values in resistors (https://mnats.net/files/DIY.JE-990.DOA.V1A.pdf)
comparison is even questionable, because only a real test will confirm
for a good comparison it is ideal to have 2 DACs and switch between, or alternatively one DAC and each channel with different I/V and in the player slide the balance left-right
for adjustment to +-12V it will be enough to reduce some values in resistors (https://mnats.net/files/DIY.JE-990.DOA.V1A.pdf)
comparison is even questionable, because only a real test will confirm
for a good comparison it is ideal to have 2 DACs and switch between, or alternatively one DAC and each channel with different I/V and in the player slide the balance left-right
wonderful! I will definitely do it.
I forgot to turn off the system last night.
It sounds so much better this morning. Amazing!
Hi Manniraj,
This is my Mouser Project I used. There
are multiple parts picked for specific locations, I was trying different capacitors. You can streamline the list if you’re not going to experiment with different caps. I believe most parts (except opamps) are included, just verify against Miro’s BOM.
Please add this project to your own cart before you alter the list.
Miro did a real nice job with this board, it’s very versatile with lots of tweaking capabilities.
Enjoy!!
https://www.mouser.com/ProjectManag...jectGUID=1c3193e4-70bb-4e3f-a812-23a3648b9525
This is my Mouser Project I used. There
are multiple parts picked for specific locations, I was trying different capacitors. You can streamline the list if you’re not going to experiment with different caps. I believe most parts (except opamps) are included, just verify against Miro’s BOM.
Please add this project to your own cart before you alter the list.
Miro did a real nice job with this board, it’s very versatile with lots of tweaking capabilities.
Enjoy!!
https://www.mouser.com/ProjectManag...jectGUID=1c3193e4-70bb-4e3f-a812-23a3648b9525
As you said you have chosen multiple different options especially for the low ESR caps in the BOM. Which one did you end up choosing on the DAC now and makes my life easier as its expensive for me to order from rsdelivers in qty of 25 and above as minimum
Thanks