Cortex Clinic with Julie
- KVRAF
- 4090 posts since 31 Oct, 2002 from Montreal, Canada
After having fun in various synths, Julie decided to do a clinic on Psychic Modulation drum sampler Cortex, specifically on the pitch sliders of its sequencer.
Cortex is not the most sophisticated drum sampler around but it does have some interesting features, one of them being the pitch sliders. I made 4 short loops to illustrate their use with a few (very few) samples from Julie's Vocal FX collection.
Loop 1: 3 different samples, the "zap" shows up twice with only a slight pitch modification; a fast sequence of the "short kiss" sample moderately modified; the "loud kiss" is used only once, no mod.
Listen to it HERE
Loop 2: only 1 sample heavily modified.
Listen to it HERE
Loop 3: same as above with another sample slightly modified.
Listen to it HERE
Loop 4: similar to loop 1 but with different samples and 4 instead of 3, overall quite modified
Listen to it HERE
Basically, the pitch sliders modify the pitch (don't tell me) of the sample, so the same sample has different pitches on different steps. The coolest feature is that if a sample is long enough, let's say its duration is equal to 4 steps, each step's slider
will modify the pitch sample in one playback of the sample. This is demonstrated in loop 2.
I don't have time to go more in depth today but if there's a significant interest in this clinic, I may do other ones on various synths and subjects.
Let me know what you think of this clinic, if you find it useful and if you would like some more.
Cortex is not the most sophisticated drum sampler around but it does have some interesting features, one of them being the pitch sliders. I made 4 short loops to illustrate their use with a few (very few) samples from Julie's Vocal FX collection.
Loop 1: 3 different samples, the "zap" shows up twice with only a slight pitch modification; a fast sequence of the "short kiss" sample moderately modified; the "loud kiss" is used only once, no mod.
Listen to it HERE
Loop 2: only 1 sample heavily modified.
Listen to it HERE
Loop 3: same as above with another sample slightly modified.
Listen to it HERE
Loop 4: similar to loop 1 but with different samples and 4 instead of 3, overall quite modified
Listen to it HERE
Basically, the pitch sliders modify the pitch (don't tell me) of the sample, so the same sample has different pitches on different steps. The coolest feature is that if a sample is long enough, let's say its duration is equal to 4 steps, each step's slider
will modify the pitch sample in one playback of the sample. This is demonstrated in loop 2.
I don't have time to go more in depth today but if there's a significant interest in this clinic, I may do other ones on various synths and subjects.
Let me know what you think of this clinic, if you find it useful and if you would like some more.
Last edited by zvon on Sat Mar 12, 2005 1:16 am, edited 1 time in total.
- KVRAF
- Topic Starter
- 4090 posts since 31 Oct, 2002 from Montreal, Canada
I forgot to add that the first loop has reverb at the end, everything else is completely dry.
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- KVRer
- 23 posts since 11 Feb, 2005 from Montreal, Canada
Quite interesting, I like loop 1 & 3 the most, I didn't know that Cortex could modified with various pitch a 4 bars sample. Your loops are highly experimental!

- KVRAF
- Topic Starter
- 4090 posts since 31 Oct, 2002 from Montreal, Canada
Glad you like it.
Psychic Modulation also has another similar product, Cerebrum. It's a drum synth instead of a sampler, they both share the same sliders who can be assigned to pitch mod and other destinations.
Psychic Modulation also has another similar product, Cerebrum. It's a drum synth instead of a sampler, they both share the same sliders who can be assigned to pitch mod and other destinations.
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jack [psychicmodulation] jack [psychicmodulation] https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=2588
- KVRAF
- 1567 posts since 24 Apr, 2002 from New Orleans, LA
I like 2 and 4, very strange things going on here.
Cortex and Cerebrum's sequencers currently only play monophonically, meaning the samples will not overlap, so the pitch can be bent with the sequence sliders over time, similar to legato on a keyboard. This can create very strange results, allowing you to bend the sample's tail in various ways.
I'm in the process of adding an option to put the sequencers in poly mode, polyphonically the samples will be triggered like normal, allowing them to overlap, this can get high on cpu though, so I'll put the option on each sample cell to regulate it a bit.
Cortex and Cerebrum's sequencers currently only play monophonically, meaning the samples will not overlap, so the pitch can be bent with the sequence sliders over time, similar to legato on a keyboard. This can create very strange results, allowing you to bend the sample's tail in various ways.
I'm in the process of adding an option to put the sequencers in poly mode, polyphonically the samples will be triggered like normal, allowing them to overlap, this can get high on cpu though, so I'll put the option on each sample cell to regulate it a bit.
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jack [psychicmodulation] jack [psychicmodulation] https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=2588
- KVRAF
- 1567 posts since 24 Apr, 2002 from New Orleans, LA
I did a quick jam using only 1 instance of Cortex, making use of the pitch sliders and the reverse functions,
check it out: cxjam.mp3
It maybe a little monotnous at times, but I did a lot of 'on the fly' pattern altering and sample mangling.
The only FX used is Blockfish on the master, to compensate for the poor mix.
check it out: cxjam.mp3
It maybe a little monotnous at times, but I did a lot of 'on the fly' pattern altering and sample mangling.
The only FX used is Blockfish on the master, to compensate for the poor mix.
- KVRAF
- Topic Starter
- 4090 posts since 31 Oct, 2002 from Montreal, Canada
Hi Jack, I will check your jam later. I also have other examples with drum sounds in this thread:
http://www.kvraudio.com/forum/viewtopic ... 10#1024010
http://www.kvraudio.com/forum/viewtopic ... 10#1024010
- KVRAF
- Topic Starter
- 4090 posts since 31 Oct, 2002 from Montreal, Canada
Nice one, I like it!Jack R wrote:I did a quick jam using only 1 instance of Cortex, making use of the pitch sliders and the reverse functions,
check it out: cxjam.mp3
It maybe a little monotnous at times, but I did a lot of 'on the fly' pattern altering and sample mangling.
- KVRAF
- Topic Starter
- 4090 posts since 31 Oct, 2002 from Montreal, Canada
Did anyone find this interesting or useful?
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alma is a fish alma is a fish https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=58182
- KVRist
- 50 posts since 17 Feb, 2005 from FL
i did thanks
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- KVRian
- 1443 posts since 27 Dec, 2003
Yes, it was interesting. I don't have Cortex but it makes me curious to try it. I like that you're actively trying and supporting various samplers and sharing your results.
edit: $30 for 7 synths seems more than fair so I've just bought the NeuroSynth pack.
(If you guys don't know you get zvon's drums for free with purchase of the Neurosynth pack. Cortex and Cerebrum are two of the plugs).
edit: $30 for 7 synths seems more than fair so I've just bought the NeuroSynth pack.
- KVRAF
- Topic Starter
- 4090 posts since 31 Oct, 2002 from Montreal, Canada
Thanks to both of you, I will certainly do another clinic with audio examples similar to this one on another synth or sampler. Don't know when yet, but I will try to do it soon.
If anyone else feels like sharing more comments, please do so.
If anyone else feels like sharing more comments, please do so.
- KVRAF
- Topic Starter
- 4090 posts since 31 Oct, 2002 from Montreal, Canada
And it's loads of fun toomn wrote:$30 for 7 synths seems more than fair so I've just bought the NeuroSynth pack.
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- KVRian
- 703 posts since 15 Sep, 2003
Cool ideas... I'll have to give them a whirl in Cortex.zvon wrote:Let me know what you think of this clinic, if you find it useful and if you would like some more.
So what exactly was your process again, step-by-step?
- KVRAF
- Topic Starter
- 4090 posts since 31 Oct, 2002 from Montreal, Canada
Briefly:
1- you load a few samples in Cortex, for playing with the pitch sliders, they have to be not too short as the results will be easier to hear with longer ones.
2- You click on the pitch button of the channel you want to modulate.
3- You adjust the pitch sensitivity slider, the higher it is, the more modulation you get. It's located just before the step sequencer row.
4- You move the sliders under the steps you want to modulate in the step sequencer.
5- You stop and save (which I did not
) when you have something you like.
1- you load a few samples in Cortex, for playing with the pitch sliders, they have to be not too short as the results will be easier to hear with longer ones.
2- You click on the pitch button of the channel you want to modulate.
3- You adjust the pitch sensitivity slider, the higher it is, the more modulation you get. It's located just before the step sequencer row.
4- You move the sliders under the steps you want to modulate in the step sequencer.
5- You stop and save (which I did not

