1. Using the DeNoise Effect (Simple & Effective for Moderate Hiss):
This is often the first and best option, especially for mild to moderate hissing.
* Locate the Effect: Go to the "Effects" panel (Window > Effects) and search for "DeNoise".
* Apply the Effect: Drag the "DeNoise" effect onto the audio clip in your timeline.
* Adjust Parameters in the Effect Controls Panel:
* Amount: This is the main control. Start with a small amount (e.g., 10%) and gradually increase it until the hiss is reduced to an acceptable level. Be careful not to overdo it, as this can make the audio sound muffled or unnatural.
* Reduce Noise By: Adjust the dB amount. Higher value means more noise will be reduced.
* Process Focus: This helps the DeNoise effect to target the frequencies that contain the most noise. Experiment with the presets or adjust manually if you know the frequencies of your noise.
* Advanced (Advanced): This is where you can fine-tune the noise reduction based on its frequency, but generally you can leave it at its default settings.
* Listen Carefully: Regularly play back the audio as you adjust the settings to make sure you're not removing too much of the desired sound.
2. Using the Adaptive Noise Reduction Effect (More Control):
This effect gives you more control over the noise reduction process.
* Locate the Effect: In the "Effects" panel, search for "Adaptive Noise Reduction".
* Apply the Effect: Drag it onto the audio clip.
* Adjust Parameters in the Effect Controls Panel:
* Noise Reduction: Controls the amount of noise reduction applied. Start low and increase gradually.
* Gain: Adjusts the overall gain of the audio after noise reduction.
* Signal Threshold: Sets a threshold below which audio is considered noise. Adjust this carefully; too high and you'll remove desired audio; too low and the noise won't be affected.
* Offset: A correction to the threshold value, which compensates for any remaining noise.
* Noise Floor: Allows you to visually see the estimated noise floor in a frequency graph.
* Experiment: The Adaptive Noise Reduction effect requires more tweaking, but it can yield better results in some cases, especially when the noise is more complex or fluctuating.
3. Using Audition's Noise Reduction (The Most Powerful - Requires Dynamic Link):
Adobe Audition is a dedicated audio editing program, and its noise reduction capabilities are significantly more robust than Premiere's built-in effects. This is often the best solution for stubborn or complex noise problems.
* Dynamic Link to Audition:
* In Premiere Pro, right-click on the audio clip in the timeline you want to clean.
* Select "Edit Clip in Adobe Audition". This will open Audition with your audio clip loaded.
* Noise Reduction in Audition:
* Capture Noise Print: Select a section of the audio where only the hiss is present (a silent part of the recording, if possible). Go to Effects > Noise Reduction / Restoration > Capture Noise Print. This tells Audition what the noise sounds like.
* Apply Noise Reduction: Select the entire audio clip. Go to Effects > Noise Reduction / Restoration > Noise Reduction (Process).
* Adjust Parameters: A dialog box will appear with detailed settings. The key settings are:
* Noise Reduction (dB): Start with a low value (e.g., -10 dB) and increase it gradually.
* Reduce By: Set the amount of reduction in dB.
* Noise Floor: Represents the estimated noise floor.
* Smooth: Applies smoothing to the noise reduction to reduce artifacts.
* Spectral Decay Rate: Controls how quickly noise reduction is applied to transient sounds.
* Preview and Adjust: Use the "Preview" button frequently to listen to the effect of your adjustments. Experiment with the settings to find the best balance between noise reduction and audio quality.
* Apply: Once you're satisfied, click "Apply".
* Save and Return to Premiere: Save the audio file in Audition (Ctrl+S or Cmd+S). When you switch back to Premiere Pro, the audio clip in your timeline will automatically update with the processed audio.
4. EQ (Equalization) - Surgical Removal (Advanced):
If you know the specific frequency range where the hiss is most prominent, you can try using an EQ to cut those frequencies. This is best done *in addition* to noise reduction, not as a replacement.
* Apply the EQ Effect: Apply the "Parametric Equalizer" (or other EQ effect) to your audio clip in Premiere Pro.
* Identify the Frequency: Use your ears (and possibly a frequency analyzer) to determine the frequency range of the hiss. Hiss often resides in the higher frequencies (e.g., 6kHz and above).
* Create a Cut: Use the EQ controls to create a narrow cut (a dip) in the frequency range of the hiss. Be gentle; excessive cutting can make the audio sound thin and unnatural.
* Listen and Adjust: Carefully listen to the audio and adjust the EQ cut until the hiss is reduced without significantly affecting the desired audio.
Tips and Best Practices:
* Use Headphones: Headphones are crucial for accurately hearing the hiss and judging the effectiveness of your noise reduction efforts.
* Start Subtle: Always start with low settings and gradually increase them. It's better to slightly under-reduce the noise than to over-reduce it and damage the audio quality.
* Listen Critically: Listen carefully for artifacts or unwanted side effects of the noise reduction. Common problems include:
* Muffling: Loss of high-frequency detail, making the audio sound dull.
* Metallic Sound: Unnatural or artificial-sounding audio.
* Pumping: Fluctuations in the audio level due to the noise reduction algorithm.
* Isolate the Hiss: The most effective noise reduction requires a clean sample of the noise. If possible, find a section of your audio recording where only the hiss is present. This will give the noise reduction algorithms a clear target to work with.
* Layer Effects: Sometimes, using a combination of techniques (e.g., DeNoise followed by a subtle EQ adjustment) can yield better results than relying on a single effect.
* Source is Key: The best solution is to record good audio in the first place. Use a good microphone, minimize background noise during recording, and set your recording levels correctly. Prevention is always better than cure!
Example Workflow:
1. Start with DeNoise: Apply the "DeNoise" effect in Premiere and adjust the "Amount" to reduce the hiss.
2. Address Remaining Hiss with Audition (If Needed): If DeNoise isn't enough, use Dynamic Link to send the clip to Audition. Capture a noise print of the hiss and apply noise reduction using Audition's more advanced tools.
3. Fine-Tune with EQ (If Needed): After noise reduction, use an EQ to gently address any remaining high-frequency hiss.
By understanding these methods and experimenting with the settings, you can effectively remove hiss from your audio in Premiere Pro and Audition, resulting in cleaner and more professional-sounding results. Remember to prioritize preserving the quality of your desired audio while removing the unwanted noise.