i have had the t4 tone match system with the LT2 for years. Recently purchased the t8s with the F1 speakers.  

‘When the bank is all ran through the board.  Bass, drums, vocals, piano, guitars.  And we are playing hard, we get a loud digital scrambled noise.  I’ve heard it in another post with similar situation they said it was like an alarm with a dead battery.  

‘We tested this.  And was able to replicate it by everyone playing hard and all vocals hitting in microphones hard.   

Any idea on what is causing it 

 

Original Post

Hi Pastor Troy,

Welcome to the Bose Portable PA Community. 


EDIT - please follow this link Loud occasional digital noise and if the problem still exists, then continue reading here.


Pastor Troy posted:

i have had the t4 tone match system with the LT2 for years. Recently purchased the t8s with the F1 speakers.  

‘When the bank is all ran through the board.  Bass, drums, vocals, piano, guitars.  And we are playing hard, we get a loud digital scrambled noise.  I’ve heard it in another post with similar situation they said it was like an alarm with a dead battery.  

That sounds really unpleasant.

Can you post a video or audio file (as an attachment)?



‘We tested this.  And was able to replicate it by everyone playing hard and all vocals hitting in microphones hard.   

What's happening on the output meters above the Master Volume control? Are the lights hitting the top showing red?

Are the lights above the trim controls red?



Any idea on what is causing it 



Thanks,

ST

Last edited by ST

Hi Pastor Troy,

A warm welcome to the forum from me too.

Pastor Troy posted:

i have had the t4 tone match system with the LT2 for years. Recently purchased the t8s with the F1 speakers.  

I take it you mean the T1 in this case as it's not been out for years. This may however not be all that relevant although the T4 and the T8 have much newer technology than the older T1.

‘When the bank is all ran through the board.  Bass, drums, vocals, piano, guitars.  And we are playing hard, we get a loud digital scrambled noise.  I’ve heard it in another post with similar situation they said it was like an alarm with a dead battery.

This sounds very much like a digital circuit being overdriven and distorting. Analog amps/preamps based on valves don't show this anomaly, but do however start to distort earlier than digital ones. This starts as a gentle distortion which many people find to be "warm sounding" until the distortion becomes really apparent. Digital circuits however remain distortion free until a certain threshold is reached. After that they distort in a very horrible way like scratching, as you describe "an alarm with a dead battery."

‘We tested this.  And was able to replicate it by everyone playing hard and all vocals hitting in microphones hard.   

Any idea on what is causing it 

I may be wrong but this is where I would start looking, especially as you state that you were "able to replicate it by everyone playing hard and all vocals hitting in microphones hard."

Have you checked the output level meters on the front panel when this happens? If you're more than maxing out here you certainly shouldn't expect everything to sound normal. 

Have you set up the input gains (trims) on all channels to make sure that your input signals aren't too hot when the loudest signal that each instrument/vocal is present?

Have you tried to mute each channel separately at the parts of the song which are causing problems to see if it's maybe only one channel causing the problem?

Have you tried to record the the main outputs where the problems occur to see if the problem is apparent before you go into the F1's?

You could also try putting the T8 through the L1 Model II analogue input (if you still have it) to see if you're distorting there.

These are just a few suggestions which you may already have tried out, but a long distance diagnosis is always difficult. Getting to the source of a particular problem is quite often a case of trial and error, and trying to isolate the source of the problem.

Maybe this has been of some help and maybe not, but this is how I would be trying to solve the problem/anomaly.

Tony

 

 

Hi Pastor Troy,

One thing I forgot to ask is what are the signal/clip LED's showing when this happens? Both on the F1's and the T8. If the F1 LED's are showing that you're more than pushing the units hard (not just slightly flickering red but steady), just back them off slightly and see what happens.

Every system will eventually reach its physical limits if pushed hard enough. When this happens and you feel that you're not loud enough,it's usually an indication that you nee a more powerful set up.

Once again, I may be wrong here and you could have some sort of fault with part of your set up, but in trying to determine this I do what I've suggested.

Tony

I’ve had a similar experience with a nasty sound happening while running my L1 Compact with too many other electrical instruments on the same circuit.

it sounded like a wet bull fart.

i was just playing music from an iPod.

Im very careful not to share electrical circuits with other equipment.

its never happened since the one time.

Hi ST & Everyone...

 I too have this problem. My four piece band played a wedding on Friday and we had digital distortion problems all night unfortunately. We were running three vocals, one guitar, an electronic drum kit into one channel and backing track sub mix from my T1 into another channel on the T8s. 

 Exactly the same problem Pastor Troy described. When we all are playing and the three vocals are singing at once we got a bad squealing digital distortion sound.

I watched the peak lights above each channel on the T8s and they were all monitoring green. I could not see the peak level meter on the input of the L1 stand as it was out of sight unfortunately.

 I know the inputs of the T8S are a lot hotter than my old T1… A friend of a friend who also owns the T8S thinks it may be the electronic drum kit distorting as he has had the same problem with his band. I’m going to call him as he is quite a tech head…

Has anyone had any definitive luck with this problem?

kind regards Nick

Hi, Nick.

Firmware version 1.1.4 includes changes to address the issue of digital noise. For those following along, there's more information here:

T4S/T8S Firmware Update Instructions



I know we talked about the firmware update a week or so ago.  If you had this problem after having applied the Firmware Update (and doing the factory reset and manually rebuiling any scenes as described in the link above) then please call Bose Support in Australia.

+1 800 091 166Mon - Fri: 09:00 - 18:00 AEST


Thanks,

ST

Hi Nick,

When you did the factory reset, did you have any saved Scenes? If you did, did you recreate the Scenes manually or did you backup the Scenes to your computer first. 

This is important because, if you backed up the Scenes and restored them from backup after doing the firmware update and factory reset, you may have re-imported some corrupt data.

Before the gig, please

  • Note of the settings you have in Scenes (write them down). 
  • Install the latest firmware. T4S/T8S Firmware Update Instructions
  • Do the factory reset
  • If necessary, manually recreate the Scenes
    • Important - do not reload any Scenes you may have backed up to your computer.



Good luck with your duo tonight.

ST

Last edited by ST

Hi ST

I just performed firmware update again, which went smoothly, then I performed the factory reset again which was not great. The screen was black/blank when I held 1,2,3 & 4 MUTE buttons down and turned the power back on. I held them for a good couple of minutes and still a blank screen, so I released the MUTE buttons & tied the power off. I repeated this and the screen came alive but stayed on the Rebooting msg for 5mins. I turned it off & repeated the steps, this time it did its thing quickly and showed the "Factory reset please wait" so i released the Mutes. It completed its process this time.

I'll try it out again today or tomorrow I think (not at my gig) in my car port..

I have to say though ST, its not exactly filling me with confidence so far 🤗 

Kind regards Nick

Hi ST

So disappointing, now screen is blank again... I'll keep trying..

OK 7th time powering on/off it came on, briefly showed factory reset again before going to normal screen mode. I'm now setting a scene which i  won't try at my gig. I'll try it tomorrow. 

I think (unless i have a faulty unit) the software design dept needs to have a really good look at this ST? Maybe ship them with the update already completed would be a great start?

PS; Please don't think i'm blaming you. You have been nothing but helpful.It probably frustrates you more than the clients in some ways!

Kind regardsNick

Hi Nick,

Oh, I'm sorry you're having such a terrible time with your T8S. It sounds like you may have a defective unit.

Are you using the AC power supply that came with the T8S?

If you are drawing power from the L1 Model II Power Stand using ToneMatch cable, that won't be reliable.

If you are using the AC power supply, then your T8S is definitely not working correctly.

If you are within the return period with the seller, please take it back and exchange it for a new unit.

If you are outside the return period, please call Bose Support Australia.
+1 800 091 166

Mon - Fri: 09:00 - 18:00 AEST

ST

Hi ST

Hope you had a great Xmas/New Year break!

I Just received my T8S back from Bose (repair shop or wherever it went) and I was about to set up my band mix before my gig tomorrow, but i noticed it now has the old firmware T8S v1.0.1

Unfortunately there are no explanitary notes of what was done to the unit to fix the multiple problems it was having. I'm guessing I still need to update firmware to T8S v1.1.4 with the previous link you sent me and then perform factory reset again... before i set up any patches?

Kind regards Nick

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