10.6

319Logic Pro Effects
Denoiser main parameters
• Threshold slider and field: Set the threshold level to a point below which the noise
signals are reduced.
Locate a section of the audio where only noise is audible, then set the Threshold slider
to a dB value that filters only signals at or below this level.
• Reduce slider and field: Set the amount of noise reduction applied to signals that fall
below the threshold. Aim for a Reduce slider value with which noise reduction is optimal
but little of the music or vocal signal is reduced. Each 6 dB reduction halves the volume
level, and each 6 dB increase doubles it.
Note:
If the noise level of your recording is very high (more than −68 dB), reducing it to
a level of −83 to −78 dB should suffice, provided no audible side effects are introduced.
This reduces the noise by more than 10 dB, to less than half its original volume.
• Noise Type slider and field: Determine the type of noise you want to reduce.
• A value of 0 equals white noise—equal frequency distribution.
• Positive values change the noise type to pink noise—harmonic noise; greater
bass response.
• Negative values change the noise type to blue noise—hissy tape noise.
• Graphic display: Shows how the lowest volume level signals in your audio material,
which are mostly or entirely noise, are reduced.
Logic Pro Legacy Denoiser smoothing controls
Denoiser has the following smoothing parameters:
Denoiser smoothing parameters
• Frequency knob and field: Adjust how smoothing is applied to neighboring frequencies.
If Denoiser recognizes that only noise is present on a certain frequency band, use the
Frequency parameter to smooth the neighboring frequencies to avoid artifacts. The
higher you set the Frequency parameter, the more the neighboring frequency bands
are changed.
• Time knob and field: Set the time required to reach maximum noise reduction. This is
the simplest form of smoothing.
Note: The Time parameter also sets a release time, which is the time required for the
signal to revert to its normal level from the maximum noise reduction level. As with all
Denoiser parameters, the Threshold value determines the level that triggers the noise
reduction process.
• Transition knob and field: Adjust how smoothing is applied to neighboring volume levels.
If Denoiser recognizes that only noise is present in a certain volume range, use the
Transition parameter to smooth the neighboring volume levels to avoid artifacts. The
higher you set the Transition parameter, the more similar-level values are changed.