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EZ Impulse Noise Procedure (Tutorial)
After your file has been gain normalized to -3 dB (found under the CD Prep Menu), the EZ Impulse Filter operating procedure is as simple as one, two, three.
Also, an array of presets is provided with the EZ Impulse Filter that may produce reasonable results without the need for adjusting the filters controls. However, the optimum results will usually be obtained by following the above-mentioned four-step procedure since impulse noise removal is source material dependent.
Note 1: Use the Impulse Noise filter(s) first in your Audio Restoration
Sequence after file gain normalization to -3 dB. Never pre-filter the signal in any other way prior to this restoration step. The filter needs the maximum bandwidth signal to help it to perform its function.
Note2: Improved performance of this filter can be achieved by recording at a 48 kHz or 96 kHz sampling rate. The filter takes advantage of the ultrasonic content of the impulse signal provided by a higher sample rate in order to improve detection and discrimination of impulsive noise. You can down-convert to 44.1 kHz immediately after the de-clicking process has been completed if you so choose, since the remaining filters will not specifically benefit from a higher sampling rate.
Note 3: Up-Sampling a file to 96 kHz that was originally sampled at 44.1 KHz or lower will not provide the same benefits outlined in Note 2. The EZ Impulse filter primarily benefits from a 48 kHz or a 96 kHz sampled file that was originally digitized (transferred) at one of these higher rates from its analog source during the Analog to Digital conversion process.
After your file has been gain normalized to -3 dB (found under the CD Prep Menu), the EZ Impulse Filter operating procedure is as simple as one, two, three.
- Place both the “Scratch” and “Crackle” and “Narrow Crackle” controls to their lowest positions.
- Using “Preview” mode, adjust the “Scratch” Control upwards for the best balance between effective scratch removal and minimized distortion. Generally, that will occur at a value around 55.
- Next, advance the “Crackle” control upwards for the best balance between effective crackle removal and minimized distortion. Generally, that will occur at a value around 50.
- Lastly, if there are any residual tiny crackles left behind, raise the Narrow Crackle control until they are attenuated by the system. Generally, that will occur at some value between 25 and 85.
Also, an array of presets is provided with the EZ Impulse Filter that may produce reasonable results without the need for adjusting the filters controls. However, the optimum results will usually be obtained by following the above-mentioned four-step procedure since impulse noise removal is source material dependent.
Note 1: Use the Impulse Noise filter(s) first in your Audio Restoration
Sequence after file gain normalization to -3 dB. Never pre-filter the signal in any other way prior to this restoration step. The filter needs the maximum bandwidth signal to help it to perform its function.
Note2: Improved performance of this filter can be achieved by recording at a 48 kHz or 96 kHz sampling rate. The filter takes advantage of the ultrasonic content of the impulse signal provided by a higher sample rate in order to improve detection and discrimination of impulsive noise. You can down-convert to 44.1 kHz immediately after the de-clicking process has been completed if you so choose, since the remaining filters will not specifically benefit from a higher sampling rate.
Note 3: Up-Sampling a file to 96 kHz that was originally sampled at 44.1 KHz or lower will not provide the same benefits outlined in Note 2. The EZ Impulse filter primarily benefits from a 48 kHz or a 96 kHz sampled file that was originally digitized (transferred) at one of these higher rates from its analog source during the Analog to Digital conversion process.