Open your preferred digital audio workstation, for example Pro Tools or Logic.
Open two audio channels. The process varies, but there is typically a tab for opening channels at the top of the channel strip.
Import the drum file. The process for importing audio varies slightly, according to which system you use, but the import function is typically in the "File" menu. For example; in Logic, click "File," "Import Audio." Once imported, the audio opens in the first channel strip in the workstation interface.
Right-click on the audio file as it appears in the interface. Select "Copy."
Right-click on the second channel strip and select "Paste."
Double-click where it says "Audio 1" and rename the channel "Bass." Rename the second channel "Snare."
Click on "Bass" to highlight it. Highlighting a channel assigns subsequent actions to that channel specifically.
Open the equalizer. This is located either in "Tools" or "Effects," depending on which program you use. The equalizer enables you to boost and cut specific frequencies within the audio.
Play the track so you can manipulate the frequencies in real-time.
Click on the frequency curve inside the equalizer grid. The vertical axis of the grid represents amplitude and the horizontal axis represents frequency. The curve represents the shape of the specific frequency, in real-time. It alters as the track rolls.
Drag the curve around the grid. This highlights different frequencies within the drum audio. When the snare becomes the dominant sound, stop moving the curve. Once you stop, the last frequency curve remains, highlighting the frequencies the snare occupies.
Hit "Stop."
Drag the "Gain" dial to 0. This effectively mutes out the snare. Because the snare occupies more than one frequency, this process alone won't completely remove the snare. It requires repeated tweaks to "distill" the audio so there is no snare left.
Hit "Play."
Drag the curve around again, this time to highlight the bass drum. Once you highlight the bass drum, increase the "Gain" level to boost the sound. Repeat this process until the bass drum is the most prominent feature of the first audio file. Then do the reverse to the "Snare" file, so you remove the bass and enhance the snare. At the end, you have two separate files, one with mainly bass and one with mainly snare.