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phantom I glitches when playing a certain song - Printable Version

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RE: phantom I glitches when playing a certain song - scotthar - 08-May-2024

re: ZeeZ
=>Yes exactly it shuts off and then tries to reconnect but then the bass will be a lot less compared to before it shuts off. And the only way to fix it is by restarting the phantom. 

Zee == If you have not you should file a ticket. More than 1, do it from your speaker, do it from some online link. phone it in. its a bug.


RE  supaDean
=>Your playback problem is an interesting one. One thought that comes to mind is that the music file itself is the problem, that is to say the way it has been mastered or has been stored on the streaming service you're pulling the song from. There could be clipping occurring that the Phantom picks up on, it being such a precise playback instrument. This is why the problem presents itself at the same moment in the song everytime it is played.

In general:

I agree it's the music, (not like that come on....) Wink . i bought the album in MP3 form from Amazon just to reproduce it after seeing it happen from some random utubz feed. Just to make sure i had as clean of a source as i was willing to muster.  I don't really think it's the FILE or the MASTERING other than it does contain a pattern the software can't handle.  the dynamic difference, right at the mark there is an interesting pattern (like in trading those diamond shapes) that lead to chaos. 

Similar root cause I'd imagine to what some have reported with MOVIES, when the content has a large dynamic burst the speaker pops sometimes when used at high volume (it sounds like 'nope' as in 'nope' not going to do that anymore) and shuts down.

about Volume. in general. 50% is the absolute sweet spot for analog electronics. anything above that and you're stressing some component somewhere.  YMMV. In general, the rule of thumb is 50% is the max volume you want to use. (for analog, not talking about digital realm) SO - i would expect the higher you go over 50% to have differences perceptible to the ear or not.

with the Phantoms: At some point while there is a lot of digital going on it has to come out someplace as ANALOG. So see above.   

In this case 50 is just a number. probably several numbers coordinated to mean the same thing. It's all SOFTWARE. 

Point is, I'd expect problems a bit further above 50% than 53 (i think that was the lowest i reproed it before) not at 50 , yes at 55, not at 51, yes at 53 and i stopped at that point or similar.  easily happens at 55 though. 

I do guess this track (by its INTETIONAL design, just the musical bits, nothing other than what the artist intended) easily exposes a limitation in the Phantoms of kind of (energy-delta) or some kind of odd 'unnatural' oscillation the mechanism is designed to prevent. (like a limiter)  - seems like a problem if you use these for say MASTERING IN A STUDIO, OUCH... Wink

Point is : 50 something whatever it is 55 or 53 is "pretty low into the buffer zone for this kind of problem" to happen.

If this were higher up into the range, > 65 or surly > 75 it would seem more 'acceptable' for UNUSUAL problems.  (though i find that even at 100 it still sounds 'perfectly fine' (ALL THINGS CONSIDERED) for what i would put through the speakers and put the speakers through on those rare occasion)

I did not do any prolonged testing but did repro it 3 or 4 times with different sources. one was a mp3 i bought from amazon, the others were random streams. perhaps all somewhat related or suspect origins but really that's not the issue.  

it's a software problem. this TRACK and the contents of this TRACK  (not the file or the encoding but the music being encoded) just happens to expose it really easily and reproducibly; this track (is the easy path or its equivalent) should likely be used in some kind of test suite for the engineering team. !!  Wink  IMO...   <3


RE: phantom I glitches when playing a certain song - ZeeZ - 06-Jun-2024

(08-May-2024, 04:48)scotthar Wrote: re: ZeeZ
=>Yes exactly it shuts off and then tries to reconnect but then the bass will be a lot less compared to before it shuts off. And the only way to fix it is by restarting the phantom. 

Zee == If you have not you should file a ticket. More than 1, do it from your speaker, do it from some online link. phone it in. its a bug.


RE  supaDean
=>Your playback problem is an interesting one. One thought that comes to mind is that the music file itself is the problem, that is to say the way it has been mastered or has been stored on the streaming service you're pulling the song from. There could be clipping occurring that the Phantom picks up on, it being such a precise playback instrument. This is why the problem presents itself at the same moment in the song everytime it is played.

In general:

I agree it's the music, (not like that come on....) Wink . i bought the album in MP3 form from Amazon just to reproduce it after seeing it happen from some random utubz feed. Just to make sure i had as clean of a source as i was willing to muster.  I don't really think it's the FILE or the MASTERING other than it does contain a pattern the software can't handle.  the dynamic difference, right at the mark there is an interesting pattern (like in trading those diamond shapes) that lead to chaos. 

Similar root cause I'd imagine to what some have reported with MOVIES, when the content has a large dynamic burst the speaker pops sometimes when used at high volume (it sounds like 'nope' as in 'nope' not going to do that anymore) and shuts down.

about Volume. in general. 50% is the absolute sweet spot for analog electronics. anything above that and you're stressing some component somewhere.  YMMV. In general, the rule of thumb is 50% is the max volume you want to use. (for analog, not talking about digital realm) SO - i would expect the higher you go over 50% to have differences perceptible to the ear or not.

with the Phantoms: At some point while there is a lot of digital going on it has to come out someplace as ANALOG. So see above.   

In this case 50 is just a number. probably several numbers coordinated to mean the same thing. It's all SOFTWARE. 

Point is, I'd expect problems a bit further above 50% than 53 (i think that was the lowest i reproed it before) not at 50 , yes at 55, not at 51, yes at 53 and i stopped at that point or similar.  easily happens at 55 though. 

I do guess this track (by its INTETIONAL design, just the musical bits, nothing other than what the artist intended) easily exposes a limitation in the Phantoms of kind of (energy-delta) or some kind of odd 'unnatural' oscillation the mechanism is designed to prevent. (like a limiter)  - seems like a problem if you use these for say MASTERING IN A STUDIO, OUCH... Wink

Point is : 50 something whatever it is 55 or 53 is "pretty low into the buffer zone for this kind of problem" to happen.

If this were higher up into the range, > 65 or surly > 75 it would seem more 'acceptable' for UNUSUAL problems.  (though i find that even at 100 it still sounds 'perfectly fine' (ALL THINGS CONSIDERED) for what i would put through the speakers and put the speakers through on those rare occasion)

I did not do any prolonged testing but did repro it 3 or 4 times with different sources. one was a mp3 i bought from amazon, the others were random streams. perhaps all somewhat related or suspect origins but really that's not the issue.  

it's a software problem. this TRACK and the contents of this TRACK  (not the file or the encoding but the music being encoded) just happens to expose it really easily and reproducibly; this track (is the easy path or its equivalent) should likely be used in some kind of test suite for the engineering team. !!  Wink  IMO...   <3

Yea i already raised this with the devialet support team and they replied with saying that they were able to reproduce the same issue i was facing. And they were gonna send it to the relevant department to check it. Hopefully it gets fixed🙏


RE: phantom I glitches when playing a certain song - leonja - 09-Sep-2024

If my statement has caused any confusion, I apologize.

I first noticed this issue in 2020, where rapidly switching between extremely low and mid-low bass frequencies, with the volume set above 56, would result in system interruptions. Upon resuming playback, the bass sound would be akin to activating night mode, and this issue has yet to be resolved. Even in the latest firmware versions, interruptions still occur, but unlike before, a restart is not required; the system automatically returns to normal bass levels before interrupting again. This cycle repeats more than twice, ultimately causing the system to become unresponsive and unable to produce sound. I engaged dozens of users in testing and discovered an interesting pattern: all hardware batches with serial number suffixes of 4U10 and later exhibit this issue, while only the 4U06 batches from 2019 and earlier are unaffected. Unfortunately, the latest machines with U20 (white, 108db) and U22 (black, 108db) suffixes also suffer from the same defect. Based on my feedback, Devialet has failed to address this issue for nearly four months, which frustrates me deeply yet leaves me powerless. As a result, I sold my new machine and purchased a 4U06 instead... Confused


RE: phantom I glitches when playing a certain song - KZMNOLD - 24-Oct-2024

I have already raised this issue with Devialet over 2.5 years ago about this exact problem.
At around 50-60 percent volume (depending on song), you can get a popping sound followed by the phantom restarting and behaving weird.

You could technically trigger this effect with any song that has a sudden dynamic hit in the infra regions (around 12-18hz) which causes the speaker to kind of protect itself to avoid it from over-excursion issues.

I have 3 Phantoms, one of the OG white Phantom’s (103db I believe it is called) and 2 108db Phantoms.
I have NEVER been able to replicate this issue with the OG phantom but have had this issue with 6 108db Phantoms that I tried with my local dealer and personal pairs.

My had a long email thread with the Devialet support but they kept persisting to switch out my Phantoms even though I told them multiple times that this issue exists in all the 108’s that I tried so in the end, I didn’t switch them out.

They claimed that they tried replicating my issue on their end to but wasn’t able to have any of the issues replicated.

These days, I run my Phantom off optical and I use a DSP box to high pass them below 23hz to avoid this issue altogether.

Hopefully they will fix this with the newest update.


RE: phantom I glitches when playing a certain song - scotthar - 15-Dec-2024

@KZMNOLD interesting about the specific frequency range and the irony - need to filter out the low end frequencies to maintain stability - Thanks for the tips!