Hey,
I got my OCSD cabinet simulator a few days ago (fantastic little unit, I love it
), and I wanted to study how the knobs affect the signal.
So I've made a series of measurements that I'm now sharing, I think you might find it interesting as well.
This will not, in any way, be done in a scientific manner, but helps give an idea of what the pedal does.
The unit has 6 parameters :
High-response
Punch
Mid-response
Cab size
Resonance
(output) Gain (kept at noon for all the measurements)
All the knobs work as you'd expect (clockwise to increase).
Their position range from 0 (7 o'clock) to 10 (5 o'clock).
I've got a reference setting, that I'll be calling "Flat" (obviously not actually flat, but having the widest frequency response, no mid scoop / boost, no lows bump) :
High-response : 10
Punch : 0
Mid-response : 10
Cab size : 10
Resonance : 5
You can see the "Flat" frequency response curve on most of the charts as a reference (look for "Flat" in the captions).
I then proceeded to make a series of measurements at different settings, starting at the Flat setting and gradually turning one knob.
Except noted otherwise, the values used for the parameters are
0 - 2 - 4 - 6 - 8 - 10 (7, 9, 11, 1, 3 and 5 o'clock).
The software I'm using (HOLMImpulse) is limited to 3 curves on the same chart, so there will be 2 charts per knob.
High-response :
6 different values ranging from 10 to 0, all other parameters kept identical to the Flat setting
It's basically a high-cut, ranging from 2kHz to 8kHz.
Note the bump around 2kHz to 5kHz (depending on the setting, when the value is past 4).
It helps in keeping the sound defined, and makes it closer to an actual mic'd cab (several bass cab mics that I know of exhibit a generous bump in that area as well)
Punch :
6 different values ranging from 0 to 10, all other parameters kept identical to the Flat setting
Boost only (~15dB), centred around 900-1kHz, and affects frequencies ranging from 300Hz up to 3kHz, helps cutting through
Mid-response :
6 different values ranging from 10 to 0, all other parameters kept identical to the Flat setting
Cut only (~15dB), centred around 500Hz, affects frequencies ranging from 150Hz up to 20kHz !
Notice the behaviour on the treble content : gradually rolls off the high frequencies when going from 10 to 5, keeping the overall response quite flat, then adding back the high-frequency content when going from 5 to 0, to emphasize the mid scoop
Cab size :
6 different values ranging from 10 to 0, all other parameters kept identical to the Flat setting
It's a high-pass, ranging from 70Hz to ~180Hz when going from 10 to 5 ; then a second filter kicks in to make it even more pronounced (up to ~300Hz).
Resonance :
I've made 2 series of 5 measurements (values : 0 - 2 - 5 - 8 - 10).
First one with a cab size at 10 (as per the Flat setting):
Second one with a cab size at 7 :
Based on the frequency set by the "Cab size" parameter, this adds a lows / low-mids bump (> 5) but can also be used to cut even more low frequency content (< 5).
I've also measured the frequency response for a few presets, just to show the diversity of curves one can achieve with those 5 knobs :
- DSM's 1x15
- DSM's 4x10 w/Twitter
- DSM's 1x10
- DSM's 8x10 (@Dsmnoisemaker settings can be found here)
- @anavar's "ampeg fridge" setting (here)
- my setting, modern tone, wide range and quite flat, but emphasizing the high-mids (> 1.5kHz) and adding a gentle bump in the lows (~80Hz), slightly cutting down in the mud area (200 - 300 Hz) :
High-response : 9
Punch : 4
Mid-response : 8
Cab size : 9.5
Resonance : 8
For those presets, I've shifted some of the curves to maintain a similar overall amplitude.
Please feel free to ask questions, and to contribute if you'd like to add recordings / demos
I got my OCSD cabinet simulator a few days ago (fantastic little unit, I love it
), and I wanted to study how the knobs affect the signal.So I've made a series of measurements that I'm now sharing, I think you might find it interesting as well.
This will not, in any way, be done in a scientific manner, but helps give an idea of what the pedal does.
The unit has 6 parameters :
High-response
Punch
Mid-response
Cab size
Resonance
(output) Gain (kept at noon for all the measurements)
All the knobs work as you'd expect (clockwise to increase).
Their position range from 0 (7 o'clock) to 10 (5 o'clock).
I've got a reference setting, that I'll be calling "Flat" (obviously not actually flat, but having the widest frequency response, no mid scoop / boost, no lows bump) :
High-response : 10
Punch : 0
Mid-response : 10
Cab size : 10
Resonance : 5
You can see the "Flat" frequency response curve on most of the charts as a reference (look for "Flat" in the captions).
I then proceeded to make a series of measurements at different settings, starting at the Flat setting and gradually turning one knob.
Except noted otherwise, the values used for the parameters are
0 - 2 - 4 - 6 - 8 - 10 (7, 9, 11, 1, 3 and 5 o'clock).
The software I'm using (HOLMImpulse) is limited to 3 curves on the same chart, so there will be 2 charts per knob.
High-response :
It's basically a high-cut, ranging from 2kHz to 8kHz.
Note the bump around 2kHz to 5kHz (depending on the setting, when the value is past 4).
It helps in keeping the sound defined, and makes it closer to an actual mic'd cab (several bass cab mics that I know of exhibit a generous bump in that area as well)
Punch :
Boost only (~15dB), centred around 900-1kHz, and affects frequencies ranging from 300Hz up to 3kHz, helps cutting through
Mid-response :
Cut only (~15dB), centred around 500Hz, affects frequencies ranging from 150Hz up to 20kHz !
Notice the behaviour on the treble content : gradually rolls off the high frequencies when going from 10 to 5, keeping the overall response quite flat, then adding back the high-frequency content when going from 5 to 0, to emphasize the mid scoop
Cab size :
It's a high-pass, ranging from 70Hz to ~180Hz when going from 10 to 5 ; then a second filter kicks in to make it even more pronounced (up to ~300Hz).
Resonance :
I've made 2 series of 5 measurements (values : 0 - 2 - 5 - 8 - 10).
First one with a cab size at 10 (as per the Flat setting):
I've also measured the frequency response for a few presets, just to show the diversity of curves one can achieve with those 5 knobs :
- DSM's 1x15
- DSM's 4x10 w/Twitter
- DSM's 1x10
- DSM's 8x10 (@Dsmnoisemaker settings can be found here)
- @anavar's "ampeg fridge" setting (here)
- my setting, modern tone, wide range and quite flat, but emphasizing the high-mids (> 1.5kHz) and adding a gentle bump in the lows (~80Hz), slightly cutting down in the mud area (200 - 300 Hz) :
High-response : 9
Punch : 4
Mid-response : 8
Cab size : 9.5
Resonance : 8
Please feel free to ask questions, and to contribute if you'd like to add recordings / demos
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