Delay on input from analog and optical input

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  • Official comment

    Hi Jesper

    When grouping the product there is delay on all Bluesound Players regardless of model number.

    It is something we are very aware of and is among one of our highest priorities as of late though we currently do not have an estimated time on resolving this in a future BluOS release.

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    Jesper Foldager

    Hi Tony,

    I am not grouping the speakers (actually, I currently have only one). It is a minuscule delay that will not affect lip-sync or anything if used with a TV. I would think it is less than 100 ms, but I have no way of measuring that. 

    I have seen this before when I tried to hook up a keyboard through a wired home cinema system. I guess there is some processing of the signal before it is amplified and sent to the speakers. 

    I'm interested because I would like to substitute my old NAD amplifier with the POWERNODE 2. But if there is a tiny delay (in single mode), I will not be able to use it with my piano.

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    Ray Smets

    I too am experiencing this issue. Makes using my dj mixer much less enjoyable. Curious if there has been a resolution to this. I am in non-grouped mode as well. 

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  • Hi Ray

    Define delay - if it is >100 ms, something in your audio chain is causing the delay. If it is less than <100ms then that is just the response of the ADC. We can help trying to troubleshoot but would need a log file by selecting Help, Send Support Request in the App.

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    Ray Smets

    Hi Tony,

    Thank you for the prompt response and apologies for my delay getting back to you. 

    The delay is probably right around 100ms maybe slightly more. It occurs when plugging in via the optical or aux input. It is particularly noticeable when having tv audio routed through the amp or when plugging dj equipment. 

    Sounds like there is no way to calibrate the delay away? Will take the time to submit logs now. 

    Thanks for your time and efforts of assistance!

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    Ray Smets

    Hi Tony, just got around to submit my logs. Within ~5 minutes of playing audio via the line-in interface, the delay made its presence known. ~150ms. Used the same email address which is tied to this account. Thanks for looking into this for me!

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    Michael McLaughlin

    I am just noticing this as well.  For general streaming off a CD player or something its likely fine.  However i am trying to use the bluesound as part of a monitoring system for my music recording studio.  In this case it's a huge issue.  Notes on my guitar sound after I pick them.  And I unfortunately have the powernode,  If i had the node I would just simply use another channel on an amp.  (It does not look like the powernode has line outs.  Maybe i can run the headphone out to another amp).

    It is likely a design issue.  The ADC really does not have a performance requirement for a recoding environment (< 5ms etc.).  And the analog in is likely routed through the ADC so that blueOS can control volume.

    To fix this the analog in should be routed right to the amp or to the line outs and blueos should control an analog volume control.  (It does say Analog in) Also there might be audiophiles thinking this is an analog routing.  It's kind of silly to have a turntable plugged into this to have it digitized again.

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  • Hi Michael

    Thanks for the feedback - we have never professed that the analogue input on Bluesound Players is a bypass and see it as a simple alternative if you happen to need to connect an analogue device. I would never recommend using it as a PA or Monitor system.

    Our good friends at NAD Electronics do have step up options such as the NAD C658 digital streamer which does include analogue bypass yet still has all the digital streaming functionality as it is powered by BluOS.

     

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    Joris Zwetsloot

    Hi Tony, 

    For my home music set-up I'm thinking of buying a Bluesound PowerNode 2i. I would like to connect my DJ gear to it as well, so thats a mixer connected to the analog in. But from the comments here it seems like there's a delay. Is it true the delay can be up to 1 second?

    Also you say you would never recommend to use it as a PA or Monitor System. Is that because of that apparent delay?

    Is this problem solved? 

    PS. I'm sorry if you've already answered this, but English isn't my first language and I want to know for sure.

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  • Hi Joris

    Yes, the delay will be a problem - as mentioned, we expect a reasonable amount of delay ~100ms with analogue or Bluetooth, ~50-70ms with COAX or Optical (just right at the lip-sync threshold). If these delays are satisfactory then you will be okay. Delays longer than that are also being added to by the audio chain of additional DACs or audio processing. Currently, the only BluOS Player that features an analogue bypass is the NAD C658. When being used and analogue bypass (meaning no digital processing) - when grouped, even with another C658, you will encounter an audible delay.

    In other words, traditional DJing with queuing and even some vinyl requires a proper PA System or you will be compensating for the delay.

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    Joris Zwetsloot

    Hi Tony, 

    Thanks so much for your explanation. 

     

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    steven bern

    Hi Tony, I also have this issue. I bought several months ago a Powernode 2i. Recently I bought a DJ controller (Pioneer DD800M) however I noticed the delay when beat matching which led me to these posts. I was very happy with the Powernode in the first place, but this is really a big damper. I guess I missed this issue while doing my research before buying the Powernode, as I could not have imagined this to be a problem on such a "good quality product". Is there any view on solving this issue in the (short) future...? Or else it would mean I would have to buy another amplifier to be able to DJ.... Thanks in advance for your reply.

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  • Hi Steve

    As stated, Bluesound is not a PA system and was never intended to be one. The issue is not a Bluesoudn issue, it is an issue in most conventional consumer-grade streaming systems that require a DAC.

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