Search found 5474 matches
- Thu Apr 04, 2024 9:10 am
- Forum: Pro Audio Design
- Topic: A Quadrature Power-Summed Compressor Sidechain For "The Uno Compressor"
- Replies: 60
- Views: 32919
Re: A Quadrature Power-Summed Compressor Sidechain For "The Uno Compressor"
Updated schematic 4/8/24. I added a simple Sidechain HP filter ahead of the Dome filter. https://proaudiodesignforum.com/images/jpg/Unocomp_Sidechain_Schematic_040824.jpg Though there appear to be a lot of op amps they can all be TL072. No attempt is being made to reduce component count because it's...
- Thu Apr 04, 2024 9:01 am
- Forum: Pro Audio Design
- Topic: A Quadrature Power-Summed Compressor Sidechain For "The Uno Compressor"
- Replies: 60
- Views: 32919
Re: A Quadrature Power-Summed Compressor Sidechain For "The Uno Compressor"
I've had an interest in a de-esser/sibilance controller for vinyl and have wanted to wrap my head around the BSB74. It would need to be a dedicated box.. Jakob Erland once described it as S&M engineering. With the inductor based delay line. I have the BSB74 literature. If you need anything let ...
- Wed Apr 03, 2024 6:29 pm
- Forum: Pro Audio Design
- Topic: A Quadrature Power-Summed Compressor Sidechain For "The Uno Compressor"
- Replies: 60
- Views: 32919
Re: A Quadrature Power-Summed Compressor Sidechain For "The Uno Compressor"
I've had an interest in a de-esser/sibilance controller for vinyl and have wanted to wrap my head around the BSB74. It would need to be a dedicated box. I decided to take a look at using a 10K linear pot, wired in a poteniometric configuration, to control the attack-release time and see if it were s...
- Tue Apr 02, 2024 5:46 pm
- Forum: Pro Audio Design
- Topic: A Quadrature Power-Summed Compressor Sidechain For "The Uno Compressor"
- Replies: 60
- Views: 32919
Re: A Quadrature Power-Summed Compressor Sidechain For "The Uno Compressor"
Thanks! What's nice is that the actual ratios now follow the calculated values. I found that the combined feedback resistance with the trim added was now about 105KΩ or about 5% higher. Some of it is due to the dynamic resistance of the soft knee diode, Q2 of array 3, but most of it (I think) are th...
- Mon Apr 01, 2024 4:54 pm
- Forum: Pro Audio Design
- Topic: A Quadrature Power-Summed Compressor Sidechain For "The Uno Compressor"
- Replies: 60
- Views: 32919
Re: A Quadrature Power-Summed Compressor Sidechain For "The Uno Compressor"
I found that a ratio trim is necessary to compensate for the tolerance in detector, sidechain and VCA control scale. When calibrated at 8:1 the lesser ratios remain accurate and near-infinite compression becomes available. The updated schematic has some additional changes. The current for the soft k...
- Thu Mar 28, 2024 9:52 am
- Forum: Build
- Topic: Phono Transfer System Construction Information
- Replies: 251
- Views: 6770719
Re: Phono Transfer System Construction Information
4.7µF, the max available in PP, should be large enough since it moves the cutoff frequency down to about 2.4 Hz. It varies a little bit as the gain jumper is moved from 10K to 14K3 to 20K for -3, 0, and +3 dB gain. The RIAA path through the first input has two coupling caps - one at the input the se...
- Thu Mar 28, 2024 9:34 am
- Forum: Pro Audio Design
- Topic: A Quadrature Power-Summed Compressor Sidechain For "The Uno Compressor"
- Replies: 60
- Views: 32919
Re: A Quadrature Power-Summed Compressor Sidechain For "The Uno Compressor"
I wanted to post a couple of other Ratio curves I simulated with the spreadsheet. The first is a linear taper rotation versus Ratio. Electrically 50% rotation is 2:1; 75% is 4:1. (The X-axis should start at 0.) https://proaudiodesignforum.com/images/png/Uno_Compressor_Taper_Linear_Pot.png The linear...
- Wed Mar 27, 2024 3:55 pm
- Forum: Pro Audio Design
- Topic: A Quadrature Power-Summed Compressor Sidechain For "The Uno Compressor"
- Replies: 60
- Views: 32919
Re: A Quadrature Power-Summed Compressor Sidechain For "The Uno Compressor"
bruno2000 aka Joe Neil published his Threshold, Ratio and Makeup mods here but I think I was asked to delete them.
- Wed Mar 27, 2024 9:10 am
- Forum: Pro Audio Design
- Topic: A Quadrature Power-Summed Compressor Sidechain For "The Uno Compressor"
- Replies: 60
- Views: 32919
Re: A Quadrature Power-Summed Compressor Sidechain For "The Uno Compressor"
The original Pico Stereo compressor used a threshold and ratio circuit where the pot element becomes part of a voltage divider. https://proaudiodesignforum.com/images/jpg/PicoSE_Threshold_Ratio.JPG At higher compression ratios small changes in control attenuation make for big changes in slope. Witho...
- Wed Mar 27, 2024 6:19 am
- Forum: Build
- Topic: Phono Transfer System Construction Information
- Replies: 251
- Views: 6770719
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.
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.