NEW FREE AUDIO UNIT: Multiband - splits a signal into separate frequency bands

Janka

This little app is brilliant—thank you very much.

Janosax

Super app thanks, very interesting on sax!!

Gavinski

@Blue_Mangoo +1 very interesting answer, thanks for that 👍

@Frank303 said:

@Blue_Mangoo Excellent, thanks for the elaborate answer! See, I learned something
Great app, perfect addition for my experiments, and a wonderful gesture to make it a gift! Your efforts are much appreciated!

uncledave

@Blue_Mangoo You should include your detailed explanations of phase shift effects on your web site, when you add MultiBand to it.

Blue_Mangoo

@uncledave said:
@Blue_Mangoo You should include your detailed explanations of phase shift effects on your web site, when you add MultiBand to it.

Sure thing. This might be a good topic for a video

israelite

Thanks @Blue_Mangoo Quite useful.
You put another Multiband apps out of the market!

Blue_Mangoo

@Gavinski @Frank303 @uncledave

Here's a video where we try to use an ordinary EQ to do frequency splitting and measure the output to show what happens when it goes wrong:

Frank303

@Blue_Mangoo Thanks for this! Very informative, generously sharing your knowledge with us.

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Frank303

@Blue_Mangoo having a ton of fun adding this to everything. But in my ignorance I have another question, if I may.
In Drambo standalone, as AU host, I can’t find a way to use multi-out AU plugins. So when I ‘mix’ the original signal from the source with the output of 1 of the bands of Multiband (say, mid frequencies to add a delay/reverb) will there be problems? I guess it’s sort of parallel signals, and Multiband can’t change the signal before it receives it, so I’m guessing it does gives problems

Blue_Mangoo

@Frank303 said:
@Blue_Mangoo having a ton of fun adding this to everything. But in my ignorance I have another question, if I may.
In Drambo standalone, as AU host, I can’t find a way to use multi-out AU plugins. So when I ‘mix’ the original signal from the source with the output of 1 of the bands of Multiband (say, mid frequencies to add a delay/reverb) will there be problems? I guess it’s sort of parallel signals, and Multiband can’t change the signal before it receives it, so I’m guessing it does gives problems

Mixing the original signal with the output from multiband would result in unexpected filtering because the signal that comes out of multiband is out of phase with the original signal. The result is difficult to predict but I myself would not do that.

Frank303

@Blue_Mangoo yeah kinda what I expected, thanks again!

Yodha

Hi @Frank303

Maybe if you use Multiband in linked group mode you can get the desired effect.

horsetrainer

@Blue_Mangoo said:
@Gavinski @Frank303 @uncledave

Here's a video where we try to use an ordinary EQ to do frequency splitting and measure the output to show what happens when it goes wrong:

Thank you so much for taking the time to explain some information relating to phase shift occurring as result of differing filter design methodologies.

I'm very interested in understanding, and experimenting with vintage analog filter designs in an effort to understand the specific reasons vintage filter types provided audibly identifiable characteristics widely associated with specific synths of the 70's and 80's.

Fascinating video! Thanks again for kindly releasing Multiband, and your in depth technical insights into it's function.

Blue_Mangoo

@CapnWillie said:
Any tips on CPU efficiency?

If I’m using correctly, I need 3 seperate instances on 3 duplicate tracks to effect/process 3 bands seperately.

In my current session in BM3 it spiked cpu from 35-84%

I’m thinking I should record each output effected by Multiband to a new audiotrack. From there unload all instances and proceed to add whatever effects.

Or, am I completely using it wrong?

That’s unexpected. This app doesn’t do very much processing. Do you think the spike came from multiband or it came from copying your tracks three times?

Blue_Mangoo

@Yodha said:
Hi @Frank303

Maybe if you use Multiband in linked group mode you can get the desired effect.

This type of configuration will work fine if you have the bands and linked groups set up correctly.

Blue_Mangoo

@horsetrainer said:

@Blue_Mangoo said:
@Gavinski @Frank303 @uncledave

Here's a video where we try to use an ordinary EQ to do frequency splitting and measure the output to show what happens when it goes wrong:

Thank you so much for taking the time to explain some information relating to phase shift occurring as result of differing filter design methodologies.

I'm very interested in understanding, and experimenting with vintage analog filter designs in an effort to understand the specific reasons vintage filter types provided audibly identifiable characteristics widely associated with specific synths of the 70's and 80's.

Fascinating video! Thanks again for kindly releasing Multiband, and your in depth technical insights into it's function.

One could compile an encyclopedia with all the research papers and other things that have been written about digital emulation of analog filters. And some of what has been written is worth reading.

However, before getting too technical about filter modeling I would recommend that anyone who is looking for an analog sound from modern synths should consider trying the amp and speaker cabinet simulation software that the guitarists are using. A digital synth played through a vintage amp and speaker sometimes gets you closer to a vintage sound than a real analog synth played directly into your DAW.

Blue_Mangoo

@CapnWillie said:

@Blue_Mangoo said:

@CapnWillie said:
Any tips on CPU efficiency?

If I’m using correctly, I need 3 seperate instances on 3 duplicate tracks to effect/process 3 bands seperately.

In my current session in BM3 it spiked cpu from 35-84%

I’m thinking I should record each output effected by Multiband to a new audiotrack. From there unload all instances and proceed to add whatever effects.

Or, am I completely using it wrong?

That’s unexpected. This app doesn’t do very much processing. Do you think the spike came from multiband or it came from copying your tracks three times?

Not sure but they are audio tracks so the cpu for the tracks should be negligible. There are other midi tracks with AUs but they were stable at 35% cpu according to Bm3 meter. When I added the 3 it spiked

I’ll delete the others to see what the 3 tracks + corresponding instsnces of Mb do alone.

I must figure it out. Love the app!

Multiband uses more processing power when the UI is open because it displays the spectrum and the filter frequency response graphs. But even when it’s open it shouldn’t be that much. If it’s going from 30 up to 80% cpu with three instances of multiband then something is going wrong

ecamburn

This such a useful utility. Very generous for you to give it away for free @Blue_Mangoo

Blue_Mangoo

@ecamburn said:
This such a useful utility. Very generous for you to give it away for free @Blue_Mangoo

israelite

@Blue_Mangoo said:

However, before getting too technical about filter modeling I would recommend that anyone who is looking for an analog sound from modern synths should consider trying the amp and speaker cabinet simulation software that the guitarists are using. A digital synth played through a vintage amp and speaker sometimes gets you closer to a vintage sound than a real analog synth played directly into your DAW.

That's a very useful information.
Thanks @Blue_Mangoo !

MadGav

@Blue_Mangoo said:

@horsetrainer said:

@Blue_Mangoo said:
@Gavinski @Frank303 @uncledave

Here's a video where we try to use an ordinary EQ to do frequency splitting and measure the output to show what happens when it goes wrong:

Thank you so much for taking the time to explain some information relating to phase shift occurring as result of differing filter design methodologies.

I'm very interested in understanding, and experimenting with vintage analog filter designs in an effort to understand the specific reasons vintage filter types provided audibly identifiable characteristics widely associated with specific synths of the 70's and 80's.

Fascinating video! Thanks again for kindly releasing Multiband, and your in depth technical insights into it's function.

One could compile an encyclopedia with all the research papers and other things that have been written about digital emulation of analog filters. And some of what has been written is worth reading.

However, before getting too technical about filter modeling I would recommend that anyone who is looking for an analog sound from modern synths should consider trying the amp and speaker cabinet simulation software that the guitarists are using. A digital synth played through a vintage amp and speaker sometimes gets you closer to a vintage sound than a real analog synth played directly into your DAW.

A critical area of analogue filter emulation is the non-linearities, to cite an extreme example the filters in an MS-20 clip hard, hence the square-wavey resonance.

On Multiband itself, I haven’t had time to play with it yet, but beyond the actual function it will be great to try a Blue Mangoo plugin to get a feel for the UI design and general quality - hard to get before having bought a plug-in from a developer. Big thumbs up!