Ratio control in soft knee compressor
- Thread starter Crusty2
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tmbg
Well-known member
sure, the ratio still determines the slope of the compression once you're past the knee portion
pucho812
Well-known member
what he said :green:
Knee refers to the way the compressor reacts when the input level reaches the threshold. A hard-knee compressor brings in all the gain reduction as soon as the signal crosses the threshold (provided that a fast attack time is used) and so controls levels very assertively. A soft knee on the other hand brings in the compression more progressively by gradually increasing the compression ratio as the signal level approaches the threshold.
As a rule, hard-knee compressors provide the tightest control while soft-knee compressors provide the most transparent sound.
Ratio refers to the how much the volume will be reduced. A ratio of 2:1 means that the part of the wave that crosses the threshold will have thier volume reduced by a factor of two. A ratio of 5:1 means that these peaks will have their volume reduced by a factor of five.
Hard knee or soft still have to have ratio control how much volume reduction.
Knee refers to the way the compressor reacts when the input level reaches the threshold. A hard-knee compressor brings in all the gain reduction as soon as the signal crosses the threshold (provided that a fast attack time is used) and so controls levels very assertively. A soft knee on the other hand brings in the compression more progressively by gradually increasing the compression ratio as the signal level approaches the threshold.
As a rule, hard-knee compressors provide the tightest control while soft-knee compressors provide the most transparent sound.
Ratio refers to the how much the volume will be reduced. A ratio of 2:1 means that the part of the wave that crosses the threshold will have thier volume reduced by a factor of two. A ratio of 5:1 means that these peaks will have their volume reduced by a factor of five.
Hard knee or soft still have to have ratio control how much volume reduction.
StephenGiles
Well-known member
.......and there was I thinking it to do with kneeing someone in the stomach!!!
Stephen
Stephen
pucho812
Well-known member
Only during a football match or as well call it in the states soccer. :green:
Thanks for the replies, as always.
This one by-passes the ratio control in soft knee. Does that mean he has chosen a fixed slope or is there more going on? http://www.massenburg.com/cgi-bin/ml/mod8900
This one by-passes the ratio control in soft knee. Does that mean he has chosen a fixed slope or is there more going on? http://www.massenburg.com/cgi-bin/ml/mod8900
> by-passes the ratio control in soft knee. Does that mean he has chosen a fixed slope
If the knee is very soft, where do you measure the slope?
Some soft-knee are fixed-slope with a very small roundy-part at the knee.
Others just get stiffer and stiffer the harder you push them. At 2dB maybe 1.5:1, at 6dB maybe 2:1, 10dB 4:1, 16dB 8:1, 25dB 20:1.
One reason the old tube limiters are not allowed to die is that they (can) have a very natural soft knee. The ratio depends how hard you push them.
If the knee is very soft, where do you measure the slope?
Some soft-knee are fixed-slope with a very small roundy-part at the knee.
Others just get stiffer and stiffer the harder you push them. At 2dB maybe 1.5:1, at 6dB maybe 2:1, 10dB 4:1, 16dB 8:1, 25dB 20:1.
One reason the old tube limiters are not allowed to die is that they (can) have a very natural soft knee. The ratio depends how hard you push them.
tmbg
Well-known member
[quote author="PRR"]>
Others just get stiffer and stiffer the harder you push them. At 2dB maybe 1.5:1, at 6dB maybe 2:1, 10dB 4:1, 16dB 8:1, 25dB 20:1.
[/quote]
Would that just be a log ratio rather than linear ratio?
Others just get stiffer and stiffer the harder you push them. At 2dB maybe 1.5:1, at 6dB maybe 2:1, 10dB 4:1, 16dB 8:1, 25dB 20:1.
[/quote]
Would that just be a log ratio rather than linear ratio?
Ah, so changing the ratio doesn't alter the slope; it sets an initial ratio which increases as input level does.
I am currently using a transistor junction to generate my curve, though I see there is plenty of room to experiment with different "knee generators".
I am currently using a transistor junction to generate my curve, though I see there is plenty of room to experiment with different "knee generators".
