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Thread: About my brand new digital mixer

  1. #1
    New Member hyperwolf's Avatar
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    About my brand new digital mixer

    Hey, guys ( and ladies )!

    I am a new comer here so thank you first for accepting me among you. Now, I just bought a Reloop RMX-60 mixer and it works wonderfully with the latest firmware version ( v 0.25 ), it has a very nice sound, no hiss or hum even at quite high volume, I really like it... Well, there is a thing though I am not sure about since it is my first digital mixer ( before I had a Allen & Heath Xone:23 ), the boot sequence ( it's when you see the light underneath the display screen turning on ) takes about 3.5 seconds to begin. I have a friend in France and on his unit ( the axact same model ) the sequence begins in only 1 second. I noticed this because I am on another european pro audio and DJ forums site ( Audiofanzine ) and he posted a video ( let's make it short )... Now, I sent an email to Reloop and they say it is because voltage but I would like to get a confirmation from an American that some digital DJ mixers take a few seconds, longer to boot here in America since there is no way for me to get that confirmation on the european site.

    Well, I imagine some of you will find my question funny but you know, despite the fact that I strive a lot to learn and that I myself now help others on the french site there is questions for wich I can't find answers without help. I do have a pro audio system in my living room, I am now purchasing my DJ set ( probably Pioneer players to complete it ) and I would like so much to be sure everything is O.K. after spending so far 4 grants that I think it was a good idea to ask.

    So, I cut right here and I thank you all in advance for you help my new friends.

  2. #2
    Supermod pea Manu's Avatar
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    moving to mixers

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    Welcome to DJF!
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  4. #4
    New Member hyperwolf's Avatar
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    Thanks! :-)

  5. #5
    New Member hyperwolf's Avatar
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    No one here has a digital mixer in America to compare on this? Even if it is a Pioneer, any mixer with a wide type ( usable on both continents ) power supply should behave approximately the same way when powered on.

  6. #6
    Quote Originally Posted by hyperwolf View Post
    No one here has a digital mixer in America to compare on this? Even if it is a Pioneer, any mixer with a wide type ( usable on both continents ) power supply should behave approximately the same way when powered on.
    I think there are special extension cords with selectable voltage.

  7. #7
    Deez Beats! KLH's Avatar
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    Most recent mixers - digital or analog - use so-called switching power supplies. These allow for use on multiple contents and can convert voltages from either 110v or 240v, so I don't see why the power supply would affect boot sequence. I've just confirmed that the RMX60 has this kind of power supply... so again, it makes no sense why a power supply would impact boot sequence.

    More important, do you see any usability differences - like unstable clock (i.e. effects go out of sync relative to music)? THAT would be a problem that I can see an unstable power supply affecting. Boot sequence? Nah.
    -KLH
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  8. #8
    Quote Originally Posted by KLH View Post
    Most recent mixers - digital or analog - use so-called switching power supplies. These allow for use on multiple contents and can convert voltages from either 110v or 240v, so I don't see why the power supply would affect boot sequence. I've just confirmed that the RMX60 has this kind of power supply... so again, it makes no sense why a power supply would impact boot sequence.

    More important, do you see any usability differences - like unstable clock (i.e. effects go out of sync relative to music)? THAT would be a problem that I can see an unstable power supply affecting. Boot sequence? Nah.
    I don't think a power supply affects the clock signals in a circuitry, unless there are modules that draw a lot of current in spikes.

    The overall sound quality and headroom may suffer though from an "unclean" PSU.

  9. #9
    It's more likely that your mixer has a different firmware version than his.. different boot up sequence. Ultimately, a digital mixer is a kind of computer.. and like most computers, they run on typical computer voltages.. 3.3v DC, 5v DC, sometimes 12V DC and for the analog circuits you could have +-15V to 18V DC. The power supply converts the incoming wall power (100V AC, 110-120V AC, 220-240V AC etc.. depending on where you live) into these same standard DC voltages, and that's what the mixer runs on, no matter where you are.

    So, the mixer would not act differently on different voltages.

    The only way in which the power supply could make for a longer startup is, some switching type power supplies.. themselves contain a simple computer or digital circuits which takes time to start up and stabilize the power. So, you'll have a turn on delay.. between when you turn on the power, and when the power supply actually starts supplying power to the mixer circuitry. Then, once that happens, the mixer itself goes through its boot sequence. Usually the 220V model of a mixer will use the same exact power supply as the 120V model.. with only a slight variation to account for the different voltage. But there's no guarantee of that. Reloop could have used an entirely different power supply for some countries.. with different start up delay. In fact you don't know even if your mixer has the exact same insides as every other mixer of that model, they could have changed the hardware somewhere along the way.. there could be different versions of the same mixer that might not be totally obvious from just looking at it. That last possibility isn't likely, but it isn't impossible either. Anyway, if it works nicely for you, I wouldn't worry about it too much.

  10. #10
    Quote Originally Posted by light-o-matic View Post
    It's more likely that your mixer has a different firmware version than his.. different boot up sequence. Ultimately, a digital mixer is a kind of computer.. and like most computers, they run on typical computer voltages.. 3.3v DC, 5v DC, sometimes 12V DC and for the analog circuits you could have +-15V to 18V DC. The power supply converts the incoming wall power (100V AC, 110-120V AC, 220-240V AC etc.. depending on where you live) into these same standard DC voltages, and that's what the mixer runs on, no matter where you are.
    I learned from the Arduino a few things about how digital stuff in general works... the Uno for example can run at 7-20VDC input voltage (supplying a 5V to the Vin input pin is possible too if I understood correctly) and by the power supplied via USB (this is also something that should be considered because some USB ports, especially in laptops, don't provide enough power to run the circuit)

    Basically it functions so that there are two processes, a setup and a loop function which contain different types of stuff. The setup is mostly used to define how the chip works and the loop contains all the stuff the board will do on command (I noticed this when making a timer for the board with LCD and tried to implement a counter in the setup function which of course didn't work because the output code needs to reside in the loop instead)

    I'd hazard a guess that most digital mixer boards work in the same fashion but it's still a mystery as to why the boot takes longer. The mixer (=whether it's an early or late model) ASIC/MCU/SOC/whatever could be from a different manufacturer with the same specs and configuration but done a bit differently?

    EDIT : That is if the firmware of the units in question is the same. There are ways to make so-called "factory resets" in some devices but I wouldn't risk doing one by force because you can end up emptying the board.

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