[sdiy] Low Pass filters and musically useful frequency range

[David Ingebretsen]

This actually sounds familiar. I think as I was reading about audio processing hardware. You take out the subsonic stuff to help the base clarity. Interesting thought. I can live with this SWAG.

Thanks Pete.

David 

>> -----Original Message-----
>> From: Pete Hartman [mailto:pete.hartman at gmail.com]
>> Sent: Tuesday, May 06, 2014 1:32 PM
>> To: David Ingebretsen
>> Cc: synthdiy diy
>> Subject: Re: [sdiy] Low Pass filters and musically useful frequency range
>> 
>> TOTAL swag follows :)
>> 
>> I was watching a video on production techniques a couple weeks ago, and
>> the guy doing it recommended for bass setting up a HPF to keep the lowest
>> of the low end from muddying up the sound.  Not explicitly said, but I was
>> guessing "on audio playback that couldn't reproduce it well".  He was using
>> a moderate Q as well so there was a bit of a bump for the low end in that.
>> 
>> Keep in mind, I'm merely repeating what he asserted; though his video did
>> seem to demonstrate a tighter bass sound by doing so, I have no authority
>> with which to agree or disagree :).
>> 
>> Could the reason be related to this concept at all?
>> 
>> Thanks
>> 
>> Pete
>> 
>> 
>> On Tue, May 6, 2014 at 2:11 PM, David Ingebretsen
>> <dingebre at 3dphysics.net> wrote:
>> > The basic question revolves around the output stage of the Moog 914
>> > fixed filter bank and the fact it incorporates a highpass filter with
>> > a cutoff around 40-60 Hz depending on how you want to define the -3dB
>> point.
>> >
>> > Questions:
>> > 1. As a general proposition and in a purely subjective context, what
>> > is the lowest frequency that is musically useful?  At some point most
>> > waveforms start to sound like clicks and pops. Subwoofers can pound
>> > your proprioceptive system and add a useful effect I suppose but "how
>> > low can you go" and still be musical?
>> >
>> > 2. Why would Moog add such a high pass filter to the 914? I can see
>> > blocking DC, but why worry about 10 Hz getting through? Does it have
>> > to do with being musically useful? I don't think this high pass filter
>> > was in the 907, so why add it to the 914?
>> >
>> > Thanks
>> >
>> > David
>> >
>> >
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