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High jitter (from aggresive DSP ???)
#1
Hi everyone,
I bought myself a reactor 600 after intensive research. The conclusion that i found is that reviews for speakers are useless !!!!

The biggest problem i have with it is very high jitter on certain tracks. Those tracks are not listenable on the reactor and i believe it is due to the aggressive dsp. I tried using all types of connection - Bluetooth, airplay, optical and jack input. Same thing
I believe that with further updates it can be corrected.


I listened to FLAC tracks from pc through a DAC with optical connection and analog jack (tried both). Also tried listening to a cd-player through optical output. I have 2 units, one Marantz and one Pioneer. It is the same so the signal is not the problem. The processing is !

I will post links from youtube so it can be easier for all of you to test for yourselves, some of the tracks that i noticed to induce jitter
You can play your own hi-fi flac tracks or original cd's, some youtube links have very poor quality. But the links are good for example purposes

here you can notice that when the battery comes in, the voice is a being recessed. It is not dependent on volume, it's as if when the bass comes in the voice is subdued. This led me to believe its because of an aggressive DSP in the internal amplifier
https://www.youtube.com/watch?v=_Y2qfmjCmCw

The beginning of this track is like a normalizing failure
https://www.youtube.com/watch?v=j2PYEEMXREU

On this one, it can be easily noticed from the 2nd minute
https://www.youtube.com/watch?v=eQbg4ijqhHY

here you can notice it from the 1:10 mark
https://www.youtube.com/watch?v=_eXiy_NDlmg

another track that sounds like it's poorly normalized
https://www.youtube.com/watch?v=rZjm-lHqXQk

another one, at the 1:20 mark when there's a chorus in the background. The chorus is very jittery and seems poorly normalized
https://www.youtube.com/watch?v=_xlwyil6...C127766032
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#2
I doubt this is 'jitter'. DSP use do not create jitter. The lower mid range of Reactors is a bit recessed, but it's not a variable thing. If it does vary, it is more like a 'late-night-mode-compression' (like ICM-Intelligent Cinema Mode on Experts) if there is such setting for Reactor. Are you using just one Reactor?
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Devialetless!
Roon, ROCK/Audiolense XO/Music on NAS/EtherRegen/RoPieee/USPCB/ISORegen/USPCB/Sound Devices USBPre2/Tannoy GOLD 8
250 Pro CI, MicroRendu(1.4), Mutec MC-3+USB
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#3
Welcome to the forum.

Please check whether night mode has been not been accidentally enabled.
(Sorry, cannot guide you further as I have Phantom Golds and it uses the older Spark App).
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#4
Thanks for the quick replies.
I have only one reactor unit.

I cannot find the night mode option in the app.
Do you guys know if reactors have this option?
Can you please guide me to it?

It indeed sounds like a volume leveler is applied.
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#5
(01-Oct-2019, 06:24)cos2012 Wrote: I cannot find the night mode option in the app.
Do you guys know if reactors have this option?
Can you please guide me to it?

It indeed sounds like a volume leveler is applied.
As I mentioned earlier, I am unable to use the Devialet App because it is not yet ready for my Phantom Gold.  In the Spark App which I am using, it is a moon symbol on right side of the volume display but I cannot see an equivalent screenshot for the Devialet App.

Suggest you contact Devialet support who are usually responsive and helpful.
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#6
If there is no night mode I may have misled you. I do not own Reactors so I'm on thin ice here.The only other thing I can think of is artefacts from summing to mono. The Youtube samples you provided all sound fine to me in stereo.
*
Devialetless!
Roon, ROCK/Audiolense XO/Music on NAS/EtherRegen/RoPieee/USPCB/ISORegen/USPCB/Sound Devices USBPre2/Tannoy GOLD 8
250 Pro CI, MicroRendu(1.4), Mutec MC-3+USB
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#7
There is also a possibility that your Reactor is broken... any chance to borrow a new reactor from your dealer to compare? Or maybe bring yours to a shop?
*
Devialetless!
Roon, ROCK/Audiolense XO/Music on NAS/EtherRegen/RoPieee/USPCB/ISORegen/USPCB/Sound Devices USBPre2/Tannoy GOLD 8
250 Pro CI, MicroRendu(1.4), Mutec MC-3+USB
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#8
(01-Oct-2019, 06:24)cos2012 Wrote: Thanks for the quick replies.
I have only one reactor unit.

I cannot find the night mode option in the app.
Do you guys know if reactors have this option?
Can you please guide me to it?

It indeeThere d sounds like a volume leveler is applied.

There is no bass reduction (night mode) on Reactors
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#9
(01-Oct-2019, 10:48)Haytera Wrote:
(01-Oct-2019, 06:24)cos2012 Wrote: Thanks for the quick replies
I have only one reactor unit.

I cannot find the night mode option in the app.
Do you guys know if reactors have this option?
Can you please guide me to it?

It indeeThere d sounds like a volume leveler is applied.

There is no bass reduction (night mode) on Reactors

You have two reactors. 
Can you listen to the tracks i gave and see if you can hear how strange those sound?
It would be nice to know my unit is not defective. 
Thanx
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#10
(01-Oct-2019, 11:26)cos2012 Wrote:
(01-Oct-2019, 10:48)Haytera Wrote:
(01-Oct-2019, 06:24)cos2012 Wrote: Thanks for the quick replies
I have only one reactor unit.

I cannot find the night mode option in the app.
Do you guys know if reactors have this option?
Can you please guide me to it?

It indeeThere d sounds like a volume leveler is applied.

There is no bass reduction (night mode) on Reactors

You have two reactors. 
Can you listen to the tracks i gave and see if you can hear how strange those sound?
It would be nice to know my unit is not defective. 
Thanx

Will try, can you maybe record what you hear on video or something ?? 
I don't really know what I'm supposed to look for  Confused
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