@Eldad
I'm no DSP expert but I read about the effect you talk about while
doing some research on linear phase eq's.
What happens with a passive eq is that frequencies are lowered in
amplitude but shifted in phase as well, so that they happen to slide
and sum with other frequencies thus increasing
another way to think about it is to pretend that your filter, whatever
it is, is a "matched filter". "matched to what?" you say. it's
matched to a signal that looks just like a time-reversed copy of the
filter's impulse response. so whatever the impulse response of the
filter is, if th
Earl Vickers schrieb:
> The L2 (RMS, magnitude response) norm doesn't place a
> bound on the output signal's peak amplitude, which is determined by
> the L-infinity norm. There's a good discussion in Dana Massie, "An
> Engineering Study of the Four-Multiply Normalized Ladder Filter,"
> JAES, July
Thanks!
This is important to know.
Every time we use EQ we can lose dynamic range. If we EQ every track of
a piece it can accumulate significantly quickly.
Cheers
Eldad
On 3/13/2011 2:36 PM, Earl Vickers wrote:
If I understand correctly (happens intermittently), we're talking
about an increase
If I understand correctly (happens intermittently), we're talking
about an increase in peak amplitude due to a high-pass filter. If
so... note that a filter with a maximum response of 0 dB at any
frequency only guarantees that a full-scale sine won't exceed 0 dB at
the output. The L2 (RMS, magn
t you get
Ross.
- Original Message - From: "Eldad Tsabary"
To: ; "A discussion list for
music-related DSP"
Sent: Monday, March 14, 2011 4:40 AM
Subject: Re: [music-dsp] digital EQ (passive) adding gain
Hello again
I did another test with a Bessel filter in A
Eldad Tsabary"
To: ; "A discussion list for music-related DSP"
Sent: Monday, March 14, 2011 4:40 AM
Subject: Re: [music-dsp] digital EQ (passive) adding gain
Hello again
I did another test with a Bessel filter in Adobe Audition and had the same
results
I took a Glen Branca symph
Hello again
I did another test with a Bessel filter in Adobe Audition and had the
same results
I took a Glen Branca symphony (just an example) and added a high pass
3rd order (Bessel) filter at 100 Hz
Instead of losing peak level it produced a file of a slightly higher
peak (from -7.73 to -6.95
