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What's the correct sequence to use and why?

Discussion in 'HW Helpdesk' started by Especialista, Feb 6, 2018.

  1. Especialista

    Especialista is a Trusted Warez PosterEspecialista B4A Enforcer Staff Member Super Moderator DEV Guild Reverser Translator

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    I'm designing a Super System for my Amateur Radio Microphones. It will have an equilizer (8 bands), a Compressor and Echo/Delay.

    My question is: What is the correct sequency of the effects? By now I'm assuming this order: Equilizer - Compressor - Echo/Delay, but I cant explain why I choosed it.

    Is that correct?
     
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  2. Warax

    Warax Honorary Member Honorary Member V.I.P DEV Guild

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    I advise you to visit this forum , they have very professional audio guys.
    Code:
    http://www.overclock.net/forum/18-sound-cards-computer-audio/
     
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  3. Ka

    KaNeT Registered User

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    (First, sorry for the delay, I didn't saw your post in my presentation post)

    You're partially right on your choice of "this order: Equilizer - Compressor - Echo/Delay".

    in this chain, you're using the EQ as a corrective one (too much bass, low-medium resonnance, sibiliance, etc.). It's the right way to do it because then you're going into the compresssor with the problems corrected, they will not trigger the compressor.

    But you can also use a EQ between the Compressor and FX. It will act as a "coloring" one. You have fixed problems with the first EQ (or the track has no problem), then with the sound compressed, you can add "coloring" (some low-medium for the punch, trebles for clarity, etc.). It's better to add these after the compressor because here you don't want the compressor being triggered more if for example, you add 4dB to the 600-800Hz range. You simply want to alter the color, not the dynamic at this stage.

    And of course, every FX goes after frequency and dynamic treatments, or you'll have a very strange sound (wet signal would not match with the dry one !).

    Hope it helps !
     
    Last edited: Feb 28, 2018
  4. Especialista

    Especialista is a Trusted Warez PosterEspecialista B4A Enforcer Staff Member Super Moderator DEV Guild Reverser Translator

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    Thank you very much, @KaNeT !

    In my case, will be only voice, and maybe a single 2kHz tone at the end of transmission.
    But I got all you said.

    I dont know if you know anything about Ham Radios, but the main goal is to keep a "constant" (compressed) audio input, maximizing SSB performance.

    Schematics are almost finished. I'll let you know about the results.

    Thanks again!
     
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  5. Ka

    KaNeT Registered User

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    I'm not familiar with ham radio, but i just read a technical article about it. From my little understanding, the frequency spectrum you can use is between 100hz and 2.8kHz ?

    If these are the limitations, I guess you should at least try to mimic this in your first EQ, then the compressor will really be triggered by the used frequency and will be more efficient. If you can have a High-Pass/Low-Pass EQ instead of a 8-band one it should be easier too...

    Good luck for your project :)
     
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  6. Especialista

    Especialista is a Trusted Warez PosterEspecialista B4A Enforcer Staff Member Super Moderator DEV Guild Reverser Translator

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    Yes, approx. that range. A little bit up and down.

    The equilizer is something I have already finished for other project. Will use it as a spare. But you're totally right: I do not need 8-band for such a range like that.
    Maybe a 3-band at most.

    Matter of fact, the main goal is a good compressor. For long distance communications using Single-Side-Band mode, it really does the difference.

    Thanks for the tips!
     
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  7. Ka

    KaNeT Registered User

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    Are you building it ? Will it have settings or a global preset ?
     
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  8. Especialista

    Especialista is a Trusted Warez PosterEspecialista B4A Enforcer Staff Member Super Moderator DEV Guild Reverser Translator

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    Building From Scratch.
    Compressor will have 4 main settings: Gain, Level, Noise Gating and Rotation.

    Check main component datasheet here!
     
    Last edited: Mar 1, 2018
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  9. Ka

    KaNeT Registered User

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    Nice... It's the first time I read some real technical details on electronic composant of an amp/compressor... I know how to use them very well but have very little clue how it's made ;)

    I think this schema is the key to really understand the way this device works. If you master this, you'll know how to set it up !

    [​IMG]
     
    Last edited: Mar 1, 2018
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  10. sa

    sachinaut Registered User

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    Equalizers are frequency filters and in compressed spectrum frequency profile changes so equalizer needs to come before compression. Echo and Delay are effects if compressed will get distorted. So right sequence should be "equalization - compression - echo/delay"
     
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