Search found 3709 matches

by JR.
Fri Apr 05, 2024 9:37 am
Forum: Pro Audio Design
Topic: A Quadrature Power-Summed Compressor Sidechain For "The Uno Compressor"
Replies: 60
Views: 27371

Re: A Quadrature Power-Summed Compressor Sidechain For "The Uno Compressor"

Thanks for the explanation, kind of like the step the old sweetening engineers performed.

JR
by JR.
Thu Apr 04, 2024 2:32 pm
Forum: Pro Audio Design
Topic: A Quadrature Power-Summed Compressor Sidechain For "The Uno Compressor"
Replies: 60
Views: 27371

Re: A Quadrature Power-Summed Compressor Sidechain For "The Uno Compressor"

Deessing in a final stereo mix is kind of after the horse has already left the barn. Generally excessive sibilance is caused by too close miking hot instruments (like cymbals). Hot HF content quickly attenuates traveling through air to a less close mic. Of course that does not help after the fact. T...
by JR.
Wed Apr 03, 2024 3:57 pm
Forum: Pro Audio Design
Topic: A Quadrature Power-Summed Compressor Sidechain For "The Uno Compressor"
Replies: 60
Views: 27371

Re: A Quadrature Power-Summed Compressor Sidechain For "The Uno Compressor"

any interest in a de-ess side chain filter? Or is that not as much of problem these days? Since this is a stereo compressor a simple de esser like a DBX900 would be inadequate for most audio program. It would need to be a much fancier side chain than a bandpass filter. Floating threshold, reacts to...
by JR.
Wed Apr 03, 2024 11:14 am
Forum: Pro Audio Design
Topic: A Quadrature Power-Summed Compressor Sidechain For "The Uno Compressor"
Replies: 60
Views: 27371

Re: A Quadrature Power-Summed Compressor Sidechain For "The Uno Compressor"

any interest in a de-ess side chain filter? Or is that not as much of problem these days?

JR
by JR.
Wed Mar 27, 2024 11:11 am
Forum: Build
Topic: Phono Transfer System Construction Information
Replies: 251
Views: 6606318

Re: Phono Transfer System Construction Information

These are working into a 14K3Ω load. Wima now have some nice 5 mm lead spaced films in the MKS2 series that go up to 6.8µF so keeping them film is do-able. Cool... I was measuring phase shift at 20kHz from a 22uF caps ESL working into a 360 ohm R. 14K should not cause an issue even with modern elec...
by JR.
Tue Mar 26, 2024 4:09 pm
Forum: Build
Topic: Phono Transfer System Construction Information
Replies: 251
Views: 6606318

Re: Phono Transfer System Construction Information

Note: back when I spent too much time on my bench messing with phono preamps (1970s) I discovered a phase shift issue caused by a 22uF aluminum electrolytic capacitor's internal inductance (in a gain leg in series with 360 ohms). I expect modern electrolytic capacitors are much better but maybe keep...
by JR.
Tue Mar 12, 2024 2:16 pm
Forum: Build
Topic: Phono Transfer System Construction Information
Replies: 251
Views: 6606318

Re: Phono Transfer System Construction Information

IIRC the IEC proposed a real pole at 20Hz (7950 uSec) back in the 80s (?). The RIAA dismissed that suggestion and left the sub 20Hz response pretty much undefined beyond the three standard RIAA time constants (75uSev, 318uSec, 3180uSec). Back in the 80s when I was trying to escape from the audiophil...
by JR.
Mon Feb 19, 2024 11:47 am
Forum: Pro Audio Design
Topic: A Quadrature Power-Summed Compressor Sidechain For "The Uno Compressor"
Replies: 60
Views: 27371

Re: A Quadrature Power-Summed Compressor Sidechain For "The Uno Compressor"

One thing I'm going to change is the gain control of the capacitance multiplier. The pot is too cramped at slow rate settings and most people would want stepped controls anyway. Switching input resistors on the inverting stage to use a 6 position rotary switch with 600, 480, 360, 240, 120 and 60 dB...
by JR.
Sat Feb 17, 2024 8:47 am
Forum: Pro Audio Design
Topic: A Quadrature Power-Summed Compressor Sidechain For "The Uno Compressor"
Replies: 60
Views: 27371

Re: A Quadrature Power-Summed Compressor Sidechain For "The Uno Compressor"

Over the years, often working with inferior gain elements, at least part of the effort was to mitigate sudden gain change artifacts. The pan between dry and full gating helped coax out subtle flaws. The problem was flaws heard with complex (music) waveforms that weren't heard with standard test sign...