[sdiy] active fluctuating treble boost

[John Mahoney]

As Paul says, the pitch-to-voltage conversion could be a problem.

I'm wondering if this couldn't be handled better by (a) using an 
exciter or EQ to add highs while (b) using a compressor's sidechain 
input to dynamically mix the exciter's output. You'd feed the 
sidechain with a highpass filtered version of the signal, basically 
like a de-esser.

(Actually, I would assume that Aphex exciters and such already work 
in a program-dependent way -- adding highs only when they are missing 
-- and I'd bet that it's more sophisticated than a simple sidechain thing.)

Another possible approach is multi-band dynamic EQ like the Waves C1 
and C4. If you want to learn about that software, I think you can 
download the manuals from www.waves.com.
--
john



At 03:50 AM 6/27/2006, Spencer Johnson wrote:
>okay, so i have an idea for a signal processor.... tell me what you
>guys think, and tell me of any major flaws or whatnot. okay, here's
>the idea:
>run an analog tone into a 9400 converter in F/V mode, so as to create
>a fluctuating voltage at its output. this voltage is then converted to
>a fluct. current and fed into an opto-isolator. then you'd have a
>fluctuating resistance, which could be able to control any res. value
>in any component, but my main idea for its use would be treble
>boosting. that resistance would be used to change the amount of treble
>boost in a basic active treble boosting circuit so that when the input
>received a lower frequency, the boosting would be greater, whereas
>when the input was a higher frequency, the boosting would be less
>noticeable. the purpose of the circuit would be to clean up the
>muddiness of lower frequency signals lacking intonation, without
>increasing the treble of already crisp high frequencies, avoiding a
>piercing tone.
>any input is welcome.
>thanks guys,
>spencer