gyraf said:My favorite for cutting-type is the Ortofon STL631
In a roundabout way, it works in a similar way to my G21..
Jakob E.
SWAN808 said:Thanks I was looking to build something stereo for processing harsh ITB signals/tracks, so maybe a deesser would not be as good as a HF limiter...I have found a schematic for the Ortofon 732 but I will have to study it to see if it's something that could be replicated...any thoughts?
I would think the most difficult part is to get hold of the triple FET (H8 MM555); I would think it's unobtainium. You may use discrete FET's but you'll need to match them. Unless you can find their characteristics, you'll have to experiment with different types. It's not an easy task.SWAN808 said:Thanks I was looking to build something stereo for processing harsh ITB signals/tracks, so maybe a deesser would not be as good as a HF limiter...I have found a schematic for the Ortofon 732 but I will have to study it to see if it's something that could be replicated...any thoughts?
abbey road d enfer said:I would think the most difficult part is to get hold of the triple FET (H8 MM555); I would think it's unobtainium. You may use discrete FET's but you'll need to match them. Unless you can find their characteristics, you'll have to experiment with different types. It's not an easy task.
An HF limiter typically limits the HF content of a wide-band signal by introducing a variable LPF.
A de-esser can operate in one of the following modes:
There may be other types I'm not aware of (or forgotten).
- A limiter that limits the whole signal but has pre-emphasis in the side-chain. Usually described as wide-band mode.
- A filter divides the signal in its LF and HF parts; limiting occurs only on the HF part, then the signals are recombined. Usually described as split-mode.
- A variable LPF is applied to the signal; similar to HF limiter
- A variable depth tunable "eliminator" filter (cut-only bell filter).
I think you need to define your needs. Is it for disc-cutting or general sibilance reduction?SWAN808 said:thanks...the Ortofon circuit may be a bit over ambitious...perhaps I should try some de-esser options you mention...perhaps I could set up some simple tests using a THAT chip...
abbey road d enfer said:I think you need to define your needs. Is it for disc-cutting or general sibilance reduction?
That's quite surprizing; there's no mention on this effect in the VT7 litterature. Do you think it's a serendipitious effect?gyraf said:Like this sort of behavior?
/Jakob E.
gyraf said:Like this sort of behavior?
/Jakob E.
I don't know how Warmth in FATSO works, maybe some slew-rate limiting. Never used it but the various videos have not convinced me of its value.SWAN808 said:I want to experiment with a circuit to soften high freq, similar to the FATSO warmth circuit...or in plugin format the SOOTHE plugin...as a stereo processor to work in a hardware processing chain alongside the DAW...
This (sliding LPF) was also a popular single ended noise reduction approach. Side chain generally clamped down on HF response when valid HF signal was lacking, opening up when HF signal is present. Even more effective for noise reduction when combined with downward expander.abbey road d enfer said:An HF limiter typically limits the HF content of a wide-band signal by introducing a variable LPF.
This is the only de-esser approach I used because I generally included de-essing as an additional feature inside a full range compressor/limiter. This way the de-esser function is only affecting the side chain circuitry.A de-esser can operate in one of the following modes:
- A limiter that limits the whole signal but has pre-emphasis in the side-chain. Usually described as wide-band mode.
Generally difficult to put Humpty back together perfectly if you only limit one bandpass of the divided up signals.
- A filter divides the signal in its LF and HF parts; limiting occurs only on the HF part, then the signals are recombined. Usually described as split-mode.
Many ways to skin any cat...There may be other types I'm not aware of (or forgotten).
- A variable LPF is applied to the signal; similar to HF limiter
- A variable depth tunable "eliminator" filter (cut-only bell filter).
JohnRoberts said:Generally difficult to put Humpty back together perfectly if you only limit one bandpass of the divided up signals. Many ways to skin any cat...
Understandable in view of integration in an already crowded console channel, but unfortunately the most obtrusive sound-wise.JohnRoberts said:"A limiter that limits the whole signal but has pre-emphasis in the side-chain. Usually described as wide-band mode."
This is the only de-esser approach I used because I generally included de-essing as an additional feature inside a full range compressor/limiter. This way the de-esser function is only affecting the side chain circuitry.
The three most common approaches are:"A filter divides the signal in its LF and HF parts; limiting occurs only on the HF part, then the signals are recombined. Usually described as split-mode."
Generally difficult to put Humpty back together perfectly if you only limit one bandpass of the divided up signals. Many ways to skin any cat...
abbey road d enfer said:I think I'll print it on three separate pages and assemble them with adhesive tape, early 20th century style...
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