Rd160 Upsampling problem

Support QnA
#1

Hello hi-fi rose support, I’ve asked the community but no answer yet…

I am using my Cd micromega CD-30 to my HIFIROSE RD 160 in upsampling, it reads 44.1 MHz to 706.5 MHz and while playing with a glorious sound the sound clips every 30 to 60 seconds for half a second and it continues to play until clipping again.
The screen dumps the numbers sometimes and sometimes not.
It feels like the RD 160 cannot calculate the high sampling and then it dumps the signal for a fraction of a second then continues as if nothing happened.
I’ve connected the Cd player straight to my preamp and no problem there.
I’m connected in coax to the rd160 with coax kimberkable.

My question is
1: should I update the rd160 first
2: is there a way to lower the upsampling résolution to 352 or less?
3: even in by-pass mode it clips as well with other modes

Awaiting your input on my problem.

Proud owner of rs130 + rd160. Gregory

#2

Hi,
You’re asking a very esoteric question.

First, the issue of updating firmware is independent of the up sampling issue.
I’d say do the firmware update but that’s just me. (Assuming its not an early release edition.)

In terms of the upsampling… that’s inside your CD-30 unit.
Had to google for it and found this: article here.

So it sounds like there is an issue within the CD-30 itself?

W.R.T the RD160 … you should be able to see the sampling rate and you can go to a menu and modify the sampling rate, including turning it off. I’m going to assume that you can’t modify the up sampling occurring within the CD30.

#3

Hello Smegel, my version was updated last year,
I’ve just did the 1.51 this afternoon

As far as my Micromega cd-30 it works ok direct to the preamplifier but the sound is flat, lifeless…

I’ll have a look at the menu tonight to see if I can lower the resolution
Which section is it in the menu tonight to see do so?

By the way, even when I by-pass it it still it’s.
I’ll Check with another cable

Thank you for the Quick support. Gregory

#4

Hi,

What are you using as your preamp?
It sounds like you’re going from CD-30 → Preamp and now want to go
CD-30 (digital out coax) → RD160 (Digital In Coax) → Pre Amp.
(Is this the case?)

I tried to find some images online of the CD-30 and on the back side there are only 3 RCA connectors.
One is the L/R analog connectors, and then a single RCA but I can’t read what is written underneath. Is that an RCA coax connection?

Since the RD160 is a DAC… per the CD-30 manual (4 pages … really?) You have to tell it that you want digital out which bypasses the internal DAC and I believe the up sampling.

I don’t own the RD160 but you should be able to find the manual online, however it should be fairly straight forward to find it from the touch panel …

You should be using the coaxial in. (RCA connector)

#5

@gdp1045

Could you please provide a detailed explanation of what device you are currently using with the HiFi Rose RD160 and how everything is connected?

We may need to recreate the same setup on our side to see whether we can reproduce the exact same symptom you are experiencing.

#6

Yes Cd to rd160 to aesthetics calypso éclipse preamp.

That sounds like a good idea to modify the output of the Cd to coax only…

Maybe that is the problem that I am using coax and not rca

You may have something there, I’ll Check the instructions of the micromega cd130

Thank you

#7

Sounds like a winner option my friend

#8

SMEGEL you are right…
Micromega cd-30 says in the 3rd page that if you use the coax digital output you have to change the output mode from rca to digital by activating the mode button.

4 pages really?

#9

I’ll just jump in here briefly.

The coaxial digital output on the Micromega CD-30 isn’t always active; it can be switched on and off.

According to the user manual for the Micromega CD-10/20/30 series:

Activation: You can activate the digital output by pressing and holding the MODE button on the remote control or on the unit itself.

Deactivation: The same process (pressing and holding the MODE button) switches the digital output off again.

Storage: The status of the digital output (on or off) is stored in the unit’s memory. This means you don’t have to reactivate it every time you restart the unit.

Background: This function is designed to optimize the analog output by minimizing digital interference (caused by an active but unused digital output) when listening only via the analog connection.

#10

Well members, friends etc…

I have put the Cd player in DIGITAL OUTPUT mode…

And that IS the way to go, no cutting whatsoever during play.

An old friend of mine Perry Pecker said many times, always start with your SOURCE

Thank you your quick and simple but precise help by pointing out it’s output mode.

It is a pleasure to say thank you to the ones that tried and helped my situation!

Gregory

2 Likes
#11

Glad it worked out.

I have to say that I think the DAC chip in the CD-30 is supposed to be pretty good. There’s a guy named Gabster out of Canada that has made a few videos on using that chip in a modern DIY DAC.

#12

I believe you are right,

the cd-30 Micromega has a spécial Power supply, chip and reading mechanism.

Not long ago it was the flagship of Micromega and souded as good as 5k Cd player

Gregory

#13

I checked its not the same chip that I thought it was… there’s a newer chip that was released in 2010 time frame.

And now all the rage are the R2R ladder DACs.

I wonder if the next generation of RS520 adn RS451 will use the AKM chips or stick w ESS. THe RD160 uses the AKM yet there seems to be a shift towards the higher end ESS chips these day too.

#14

@gdp1045

One last thing to confirm:

Do you experience the same issue even when connecting the CD player and the RD160 with a different cable?

#15

I don’t have another coax digital cable
but ill try with a short rca and see what happens…

#16

:+1:t2::muscle:t2::clap:t2:…20 characters

#17

@gdp1045

Have you tried connecting with another short RCA cable? If so, what symptoms are you experiencing?

We have not been able to reproduce this issue on our side, so we would need your feedback.

#18

I have tried a nirvâna digital cable worth 900d and it sounds much more detailed but the sound cuts but not as often, like every 2 minutes like. By the way the sound does not cut when I use the Cd player with rca output to my aesthetics calypso preamp and not using the rd160, that is why I am baffles and intrigued by that fact.
I will try a short rca cable instead tonight!

#19

@gdp1045

First, please let us know what happens when you use a different, shorter RCA cable, and we will also check on our side.