I'm warming up to Ableton Live by attempting to manipulate songs into how various animals would hear them.

For example, idealized bats hear roughly between octave 7, starting at 1.28kHz, to octave 13, ending at about 164kHz. Just like us, their sensitivity to sounds in their hearing range drops off toward the edges (they hear 20kHz really well, but 2kHz & 150kHz would be really quiet).

Ok, so, I load a song into a Live clip, and I add an EQ device, and I cut off low frequencies below about 1.28kHz. However, this is what the frequency visualization shows me:

![the red line of the filter completely drops off at 1.28kHz, but the frequency of the song is still very high below that point](https://i.stack.imgur.com/9mrCX.png)

Far from ending the frequencies at 1.28 and rounding them in above that, it seems that many frequencies, the whole way down to 50Hz, are still in this audio. And indeed, the human vocal range ends at about 1100Hz (though Jeff Mangum's seems to be centered around 610 in this song), but the singing can still be heard very clearly with this EQ in effect (& it doesn't just sound like overtones).

So I could "eye it up" to ensure that I don't, in this particular song, **see** any frequencies leaking in below my cutoff. But that feels incredibly unscientific. Is there a better way to EQ or limit my audio to get the (admittedly strange) effect I want?

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Related: Why's the EQ visual end at just above 11k? That leaves more than half an octave of human hearing out! (I know, I know, it's all just air, but still.) It **would** actually be kinda nice to be able to see some higher pitches in my visual, just to have some sense of what my bat might hear. Bonus points if you know a way to do this! (Above 44kHz would all just be digital noise, I realize, since that's the sampling rate of this track, but that could still be interesting, since I think a bat would indeed hear that digital mess.)