Thread: zero reducing vocals ?

  1. #1
    Android geek@02's Avatar
    Join Date
    Mar 2004
    Location
    Kurunegala Colony, Sri Lanka, Sri Lanka
    Posts
    470

    zero reducing vocals ?

    Hi!
    are there software that could reduce the vocals of a song to an unaudiable level -- without reducing the audio quality? i have one called Goldwave, but it cant actually do that. When i reduce voclas with it, i still could here the voice as loud wispers, and the audio quality drops. if i reduce it more, quality becomes crap. any recommendations? thx.
    GameJolt: https://gamejolt.com/@KasunL
    Game Development Youtube:
    https://is.gd/XyhYoP
    Amateur IT Blog: http://everything-geeky.blogspot.com/



    (and, sorry for my amateur English)

  2. #2
    Kernel hacker
    Join Date
    Jul 2007
    Location
    Farncombe, Surrey, England
    Posts
    15,677
    Well, unless you have original recordings on a multichannel media, you can't separate voice from other sounds on the recording - all of the sounds are mixed together into the two stereo channels (obviously, if all of the vocals are on the left/right channel, and the instruments are on the right channel, yes, it would be simple).

    Any software that attempts to do this will use some "intelligent filtering", but it's never going to be doing EXACTLY what you want - it will at best guess right most of the time.

    Tell me, if you have a waveform (of an audio track) on the screen, how do you know what part of that is the vocals, and what is for example drums or guitar?

    --
    Mats
    Compilers can produce warnings - make the compiler programmers happy: Use them!
    Please don't PM me for help - and no, I don't do help over instant messengers.

  3. #3
    Android geek@02's Avatar
    Join Date
    Mar 2004
    Location
    Kurunegala Colony, Sri Lanka, Sri Lanka
    Posts
    470
    ok. but i guess it might be easier to filter out the dialogs from a movie (at least for some extent) and to bring out the underlying soundtrack (vocals are more infrequent and clearer than in songs)? anyone know of any software designed to do this?
    Last edited by geek@02; 04-22-2008 at 10:22 AM.
    GameJolt: https://gamejolt.com/@KasunL
    Game Development Youtube:
    https://is.gd/XyhYoP
    Amateur IT Blog: http://everything-geeky.blogspot.com/



    (and, sorry for my amateur English)

  4. #4
    (?<!re)tired Mario F.'s Avatar
    Join Date
    May 2006
    Location
    Ireland
    Posts
    8,446
    With advanced software it's possible to separate any sound source from the remaining sources. The quality of the results may vary and it involves a lot of work an patience on behalf of the person using the software.

    It is however necessary that other sound sources don't superimpose themselves on the source you are trying to extract. As long as there is only the faintest audible representation of a sound source, it can theoretically be extracted and manipulated, no matter the number of channels.

    Good luck finding the money to buy these.

    EDIT: Was forgetting the link... http://www.cerlsoundgroup.org/Loris/ for an advanced open source alternative
    Last edited by Mario F.; 04-22-2008 at 10:59 AM.
    Originally Posted by brewbuck:
    Reimplementing a large system in another language to get a 25% performance boost is nonsense. It would be cheaper to just get a computer which is 25% faster.

  5. #5
    Officially An Architect brewbuck's Avatar
    Join Date
    Mar 2007
    Location
    Portland, OR
    Posts
    7,396
    Quote Originally Posted by matsp View Post
    Well, unless you have original recordings on a multichannel media, you can't separate voice from other sounds on the recording - all of the sounds are mixed together into the two stereo channels (obviously, if all of the vocals are on the left/right channel, and the instruments are on the right channel, yes, it would be simple).

    Any software that attempts to do this will use some "intelligent filtering", but it's never going to be doing EXACTLY what you want - it will at best guess right most of the time.
    Most karaoke machines work by assuming that the vocals are at stereo center, and the instruments are always displaced, at least somewhat, from center. Therefore if you correlate the left and right channels you get a strong signal which approximates the vocal track, and you can subtract that out. In practice, the correlation might not even be necessary if the vocals are strongly to the center and everything else is strongly to the sides:

    If:

    L = l(t) + v(t)
    R = r(t) + v(t)

    Then the difference is:

    L - R = l(t) - r(t)

    And the v(t) has disappeared.

  6. #6
    Android geek@02's Avatar
    Join Date
    Mar 2004
    Location
    Kurunegala Colony, Sri Lanka, Sri Lanka
    Posts
    470
    yeah, vocal reducing software works better if the vocals are flat and has no resonance in either channel.
    GameJolt: https://gamejolt.com/@KasunL
    Game Development Youtube:
    https://is.gd/XyhYoP
    Amateur IT Blog: http://everything-geeky.blogspot.com/



    (and, sorry for my amateur English)

Popular pages Recent additions subscribe to a feed

Similar Threads

  1. Reducing rational numbers - code not working properly
    By adrian2009 in forum C Programming
    Replies: 2
    Last Post: 04-17-2009, 07:42 AM
  2. Reducing the size of compiled file
    By Diablo84 in forum C++ Programming
    Replies: 11
    Last Post: 04-07-2005, 04:00 PM
  3. Reducing loops
    By Roaring_Tiger in forum C Programming
    Replies: 4
    Last Post: 03-11-2003, 08:17 PM
  4. Reducing Fractions/Entering fraction form
    By csmatheng in forum C Programming
    Replies: 4
    Last Post: 09-08-2002, 02:43 PM
  5. sorting vocals
    By exxinox in forum C++ Programming
    Replies: 2
    Last Post: 02-12-2002, 08:37 PM