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Removing or isolating specific instruments from a mixed audio track is a challenging task, and it's not as straightforward as removing vocals. While there are some software tools that claim to isolate or remove specific instruments, the results may vary, and complete removal is often not achievable without affecting other parts of the audio.

One approach you can explore is using audio editing software with spectral editing capabilities, like Adobe Audition or iZotope RX. These tools allow you to visualize and edit the frequency content of an audio file. However, even with these tools, removing a specific instrument entirely while leaving others intact is challenging and may result in artifacts or undesirable changes to the overall sound.

Another option is to look for commercially available multi-track versions of songs. Some music producers release stems or individual tracks of their songs for remixing purposes. If you can find a multi-track version of the song you're interested in, you can mute or lower the volume of the guitar track to create a backing track.

Keep in mind that using or manipulating copyrighted material may have legal implications, so ensure you have the right to modify and use the audio tracks as you intend.

It's important to set realistic expectations when attempting to remove or isolate specific instruments, as perfect separation is often not achievable with current technology. Experimenting with different approaches and tools can help you find a solution that works for your specific needs.
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