I was recently listening to music while in a conference call with my headphones, and I noticed that they changed to a “hands-free mode” and the music that I was listening to degraded to something that sounded like elevator music. Is there a way to apply this to any song that I have a file for?
You filter out the high and the low frequencies, leaving only the mid-band frequencies that intercom and telephone systems can carry.
A band-pass filter.
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