May 01, 2017 Some video cameras, portable recorders, and audio interfaces can impart annoying high frequency noises that could ruin your audio. The Spectral De-noise plug-in in iZotope’s RX audio repair software can help clean up your audio and preserve your tracks.
- The De-hum audio plug-in and module in iZotope RX automatically identifies the base frequency of unwanted hum and precisely removes it from the recording along with harmonics, ensuring a clean overall sound without electrical interference.
- This process of assigning frequency components to sources is called spectral masking, and the mask for each separated source is a number between zero and one at each frequency. When each frequency component can belong to only one source, we call this a binary mask since all masks contain only ones and zeros.
Output hum only - outputs the difference between the original and processed signals (suppressed hum)
Frequency Type - sets the base frequency of the hum to be removed. The two most common base frequencies that cause
hum are 50 Hz (Europe) and 60 Hz (U.S.). Other base frequencies can be selected by choosing the 'Free' option.
Note: When the Remove Hum module's 'Frequency Type' is set to 'Free', you can use the Spectrum Analyzer (under 'View -> Spectrum Analyzer') and it's peak readout display to help find the exact peak frequency of any unwanted hum.
Learn - analyzes the current audio selection in order to automatically locate and set the base hum frequency.
Digital DSP: enables linear phase filters
Base frequency (Hz)- this slider is only enabled when the Frequency Type is set to Free
Filter Q - controls the bandwidth of filters for base frequency and harmonics
Enable highpass filter: allows high frequencies to pass while attenuating lower frequencies.
Izotope Rx Download
Highpass frequency(Hz) - sets the cutoff frequency for the filter
Highpass Q - sets the bandwidth of the highpass filter
Izotope Rx Remove Frequency Test
Enable lowpass filter: allows low frequencies to pass while attenuating high frequencies.
Lowpass frequency(Hz)- sets the cutoff frequency for the filter
Lowpass Q - sets the bandwidth of the lowpass filter
Izotope Rx Remove Frequency List
Num Harmonics: select the number of harmonics that need to be removed (1-8)
Linking Type: here you can choose to link the gain/suppression of all of the filters, none of the filters, or odd/even filters
Harmonic slope - when harmonics are linked, this controls the slope of the gain/suppresion. As the harmonic order increases the gain/suppresion level resolves closer to 0 dB.
Izotope Rx Remove Frequency List
Harmonic even/odd slope - when linking type is odd/even, this allows you to control the amount of gain/suppression for both odd and even harmonics
Izotope Rx Free Trial
Filter DC Offset: this removes the DC (direct current) offset that is caused by the imbalance that sometimes occurs in A/D converters. DC offset is exhibited by the waveform appearing above or below 0 dB.
Harmonic gains (dB): gives numerical readout of gain settings in dB. You can also manually type in your gain settings for any of the harmonics.