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Hi, I need help to make a audio test

Discussion in 'Pro Audio Equipment' started by rogerio, Jan 25, 2005.

  1. rogerio

    rogerio Guest

    Hi, I am brasilian, and I need 30 or 10 seconds-24 bit/96khz- of tape noise sound to make a audio teste.Someone can help me?

    sorry my english, thanks!
  2. David French

    David French Well-Known Member

    Hey rogerio, welcome to RO.

    Define "tape noise". Also, describe the test.
  3. rogerio

    rogerio Guest

    Hi, I am talking about the magnetic tape recorders machines noise/hiss (studer/ampex). I know that this machines have amount of distortion - maybe 1% or more- and a signal to noise ratio of
    65/60 db.
    Well, I try others noises in my digital tracks and the sound realy open and shine on high frequencies, sounded much more warm; but the noise on tape recorders have a epecific "equalization" or frequêncy response, like in dither process, that define better the "warm color" .To me, this process can make better results than any other plugin.
    The point is that it is not necessary have more than 44/96 khz to convert the sound of instruments and voice(IMO) -it does not have/make difference-, but the analog sound on pres and eqs and analog compressors have 1.5 us (0.0000015 sec) on your minimal sample- and for this is necessary 705 khz; I think that if we upsample this noise in one especific frequency and mix it with the sound track, we can "emulate" better the analog flux; and after all, need add some specific saturation/harmonic distortion , etc.
    well, is that, more or less, hehehe .ah, The noise also can be recorded in 192 khz.

    sorry my english, thanks
  4. David French

    David French Well-Known Member

    Still not sure what you plan do use the noice for. Are you wanting to use it to somehow effect the frequency respose of your other audio? I don't think this will work or is ever worth doing, because there's much more to analog sound than frequency response; I don't think that adding tape hiss at -65 dBFS is going to make a digital recording sound analog.

    I see your pont, but changes at that rate are in the MHz band and are not audio; therefore, we cannot hear them and therefore do not need to encode them. Also, what speaker can deliver frequencies in that region anyway?

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