Filtering a vocal track removes certain frequencies from the vocal. Acoustica's Mixcraft audio production program includes three filters: a high-pass filter, a low-pass filter and a resonant filter. Use the low-pass filter to remove high-frequency sounds -- like tape hiss -- from a vocal recording; apply the high-pass filter to remove low frequencies that can conflict with the drums and the bass. Use Mixcraft's auto-filter to add a more drastic filtering effect to the vocals in a song.
Launch Mixcraft. Click "Browse" in the pop-up window, then click on the Mixcraft project containing the vocals you want to filter. Click "Open."
Click on the first vocal clip on the vocal track. Click the "Clip Volume" drop-down menu at the top of the window.
Click "Low Pass Cutoff" if you want to filter out the high frequencies in the vocal. Click and drag the filter cut-off markers that appear on the vocal clips to change the frequency at which the filter activates. Select "Low Pass Resonance" from the drop-down menu and drag the resonance markers upward to amplify the frequencies around the filter cut-off point. Repeat the process for any other clips on the vocal track.
Select "High Pass Cutoff" from the drop-down menu to filter out the lower frequencies from the vocal. Adjust the cut-off points that appear on the clip, then select "High Pass Resonance" from the menu and adjust the resonance points. Repeat the process for any other vocal clips.
Click the "FX" button on the vocal track if you want to apply the auto-filter to the vocals. Click "Select an Effect" in the pop-up window, then click "Classic Auto-Filter." Select a preset from the "Preset" drop-down menu. If you want to fine-tune the filter, click the "Edit" button, then adjust the auto-filter's "Type," "Freq," "Reson," and "LFO" controls as desired. Click the "Play" button to listen to the filtered vocal.