hi-pass filtering

ponte_ricky · Post by **ponte_ricky** » Sat Sep 05, 2009 9:05 pm

when people talk about this is it just in EQ or is it something different? is there something in reason i can do this with? feels like a really stupid question considering im doing a course in sound engineering but its not something ive really thought much about.

thanks

owlbeat · Post by **owlbeat** » Sat Sep 05, 2009 9:10 pm

A high pass filter is just that: a filter that gets rid of all the lows and lets the hi-mid/highs through.

It is, of course, completely customizable as far as frequency goes. I don't have much experience in Reason, but I'm certain it has a HPF somewhere.

ponte_ricky · Post by **ponte_ricky** » Sat Sep 05, 2009 9:11 pm

yeah i know what they do, i was just unsure as to wthether it was different to just using eq to remove unwanted frequencies

MinusLDS · Post by **MinusLDS** » Sat Sep 05, 2009 9:18 pm

Use the stereo imager.

select the hi pass/lo pass/normal thing on the very right hand side to select which band you wanna use.

The knob on the left is the stereo width for the low end, the knob on the right is the stereo width for the high end. Then the middle knob is which frequency acts as the crossover point between hi and lo pass.

hope that made some sense to you

owlbeat · Post by **owlbeat** » Sat Sep 05, 2009 10:01 pm

Most parametric EQs will also have LPF/HPF, too.

dav.id · Post by **dav.id** » Sun Sep 06, 2009 1:20 am

low pass= high cut
high pass= low cut

am I right?

hurlingdervish · Post by **hurlingdervish** » Sun Sep 06, 2009 1:31 am

an eq can be used as a filter and a filter can be used as a basic eq

they do the same things if you can select the shape of each band

hipass=low cut

lowpass=high cut

you are correct

therapist · Post by **therapist** » Sun Sep 06, 2009 1:54 am

Reason has its own HPF anyway, no need to use the imager for that (but not a LPF... why propellerhead? seems an obvious thing to include) and it's pretty tidy.

hurlingdervish · Post by **hurlingdervish** » Sun Sep 06, 2009 1:57 am

Therapist wrote:(but not a LPF... why propellerhead? .

MinusLDS · Post by **MinusLDS** » Sun Sep 06, 2009 2:35 am

Therapist wrote:Reason has its own HPF anyway, no need to use the imager for that (but not a LPF... why propellerhead? seems an obvious thing to include) and it's pretty tidy.

excuse my ignorance here but whats the reason in not using the imager for this?... and are you talking about the envelope filter or is this a combi patch which I havent seen?

the filter in reason seems to add its own kinda 'sound' to what your using it on. which i'm not really into. (although i haven't actually used it for quite a while so this may just be my mind playing tricks on me here)

...hopefully this threads gonna teach different as well then...

ponte_ricky · Post by **ponte_ricky** » Sun Sep 06, 2009 8:36 pm

where can i find the hpf on reason?

gravity · Post by **gravity** » Mon Sep 07, 2009 10:17 am

Therapist wrote:Reason has its own HPF anyway, no need to use the imager for that (but not a LPF... why propellerhead? seems an obvious thing to include) and it's pretty tidy.

i think you can but you have to use the subtractor filter rather than the normal filter, which is a bit of a pain in the ass.

one of the various reasons i dont use reason.

lojik · Post by **lojik** » Mon Sep 07, 2009 10:22 am

Filters are used instead of EQs for things like simplicity of automating the cutoff frequency. Also you can add resonance to a filter which technically you CAN do with EQ, its just more complicated.

Ongelegen · Post by **Ongelegen** » Mon Sep 07, 2009 11:01 am

u can route the sound thru thor and use filter slot 3. To do this, u route the output of your instrument u want to hipass to the audio inputs 1 and 2. On the matrix of thor, u select audio in1 to filter 3 left in. The same with audio in2 but to filter 3 right in. This way u can make use of al the filters. Dont forget to turn the oscillators off if u have it in a combinator with a sequence.

ponte_ricky · Post by **ponte_ricky** » Mon Sep 07, 2009 11:18 am

sweet thanks for the info

Ongelegen · Post by **Ongelegen** » Mon Sep 07, 2009 11:46 am

i forgot to mention, u have to turn the value in the matrix to 100 for both inputs, or else there won't come any sound thru, just in case u didnt know.

therapist · Post by **therapist** » Mon Sep 07, 2009 12:20 pm

I wasn't saying the filter is necessarily better than using the imager, but there's more scope on it, resonance and an envelope etc. It does add a sound, but you might want that. Sometimes the bandpass can do when you want to cut the lows as well. Similarly the imager is much easier than the thor method, but doesn't give you the controls (aside from freq.)

vivace · Post by **vivace** » Mon Sep 07, 2009 1:11 pm

In Renoise you can see the frequency-curves of all filters. It explains what they do in the blink of an eye. Killer.

hi-pass filtering

hi-pass filtering

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