AES/EBU input flashes red - Forum
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AES/EBU input flashes red
jappi, muokattu 6 Vuodet sitten.
AES/EBU input flashes red
Padawan Viestejä: 36 Liittymispäivä: 28.7.2016 Viimeisimmät viestitI'm using s/pdif output with Neutrik BNC/XLR 75 to 110 ohm impedance transformer (connected directly to the speaker). Cables are relatively short (Input from player is 3m, AES/EBU between speakers is 5m).
Edit: Checked source by switching to another player. Similar behavior on different albums though. Noticed that some songs blink less than others. Some don't at all. Could it be because of output level difference or/and audio compression levels?
Any idea what's the problem and how to fix?
jappi, muokattu 6 Vuodet sitten.
Re: AES/EBU input flashes red
Padawan Viestejä: 36 Liittymispäivä: 28.7.2016 Viimeisimmät viestitShould I try active s-p/dif - aes/ebu converter?
1038, muokattu 6 Vuodet sitten.
Re: AES/EBU input flashes red
Jedi Master Viestejä: 340 Liittymispäivä: 6.4.2009 Viimeisimmät viestitThis can be because the track you are listening to was recorded with digital clipping... hence the light still flashing at -120dB in GLM.
jappi, muokattu 6 Vuodet sitten.
Re: AES/EBU input flashes red
Padawan Viestejä: 36 Liittymispäivä: 28.7.2016 Viimeisimmät viestitThe red LED indicates a few different situations, in your case it may be that the incoming signal is at 0dBfs.
This can be because the track you are listening to was recorded with digital clipping... hence the light still flashing at -120dB in GLM.
Ok, that might be. As I'm not recording engineer I don't know how often digital clipping occurs. But on some records flashing occurs rarely if at all. But in some it's almost continuous.
Anyway it's very annoying. And I don't know if it's dangerous to the speakers as well? Since I'm inputting s-p/dif level signal 0,6V instead of aes/ebu 7V the input itself shouldn't be overloaded?
ilkka-rissanen, muokattu 6 Vuodet sitten.
Re: AES/EBU input flashes red
Yoda Viestejä: 2564 Liittymispäivä: 23.3.2009 Viimeisimmät viestitIt is not dangerous to the speakers at all, it is just a indication. Unfortunately there is no way to change this behaviour other than choosing to listen properly mastered songs without digital clipping.

jappi, muokattu 6 Vuodet sitten.
Re: AES/EBU input flashes red
Padawan Viestejä: 36 Liittymispäivä: 28.7.2016 Viimeisimmät viestitHi,
It is not dangerous to the speakers at all, it is just a indication. Unfortunately there is no way to change this behaviour other than choosing to listen properly mastered songs without digital clipping.
Hi Ilkka,
So using powered s-p/dif to aes/ebu converter with proper voltage level instead of passive wouldn't help at all?
It seems that most of the songs are not properly mastered...


ilkka-rissanen, muokattu 6 Vuodet sitten.
Re: AES/EBU input flashes red
Yoda Viestejä: 2564 Liittymispäivä: 23.3.2009 Viimeisimmät viestitYou can easily check your songs with any typical audio software (even freeware like Audacity). If you see peaks that reach 0 dBFS, you know that it's the reason for those red blinks.
jappi, muokattu 6 Vuodet sitten.
Re: AES/EBU input flashes red
Padawan Viestejä: 36 Liittymispäivä: 28.7.2016 Viimeisimmät viestitConverter won't do any difference because the "problem" is already in the original signal, it's not about a mismatch or level between the source and the monitor.
You can easily check your songs with any typical audio software (even freeware like Audacity). If you see peaks that reach 0 dBFS, you know that it's the reason for those red blinks.
Ok thanks. I will check. I also noticed that there has been similar issues reported with 82xx-series several years ago. Is this "problem" fixed in 83xx series?
ilkka-rissanen, muokattu 6 Vuodet sitten.
Re: AES/EBU input flashes red
Yoda Viestejä: 2564 Liittymispäivä: 23.3.2009 Viimeisimmät viestit
Ok thanks. I will check. I also noticed that there has been similar issues reported with 82xx-series several years ago. Is this "problem" fixed in 83xx series?
It is not a problem or error in the monitor, it is a designed feature which helps the audio professionals. By blinking the red light, the monitor notifies the sound engineer if the digital signal level is being clipped and he/she needs to turn down the level.
We do not want to disable this feature but we can fine-tune how sensitive it is to clipping i.e. how many clipped samples are needed for the red LED to lit. A firmware update is required for the monitors. I will get back to this soon.
jappi, muokattu 6 Vuodet sitten.
Re: AES/EBU input flashes red
Padawan Viestejä: 36 Liittymispäivä: 28.7.2016 Viimeisimmät viestitilkka-rissanen, muokattu 6 Vuodet sitten.
Re: AES/EBU input flashes red
Yoda Viestejä: 2564 Liittymispäivä: 23.3.2009 Viimeisimmät viestitYes I think that is the reason. Any news on FW update?
Not yet but I will keep you updated.
jappi, muokattu 6 Vuodet sitten.
Re: AES/EBU input flashes red
Padawan Viestejä: 36 Liittymispäivä: 28.7.2016 Viimeisimmät viestitilkka-rissanen, muokattu 6 Vuodet sitten.
Re: AES/EBU input flashes red
Yoda Viestejä: 2564 Liittymispäivä: 23.3.2009 Viimeisimmät viestitPlease download the GLM 2.2.0 build 93 and update firmware of each loudspeaker. The clip indication function has been fine-tuned so that it does not indicate clip unless the signal is truly clipping.
viewtopic.php?f=3&t=2733
jappi, muokattu 6 Vuodet sitten.
Re: AES/EBU input flashes red
Padawan Viestejä: 36 Liittymispäivä: 28.7.2016 Viimeisimmät viestitmarkus-kahelin, muokattu 6 Vuodet sitten.
Re: AES/EBU input flashes red
Jedi Knight Viestejä: 109 Liittymispäivä: 16.3.2010 Viimeisimmät viestitNew firmware has always overall network stability and performance improvements for the GLM software platform.