Sideband and ModMapper modules
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- KVRAF
- 5234 posts since 25 Feb, 2008
Modmapper is a fancy modulation source that can be used in a few different ways.
The best way to see how it works is to assign it to a parameter and see what effect changing the dialogue boxes has (the lower 'modulator' box selects which modulation source modulates the modmapper, so, this is a mod source that may itself be modulated by a mod source - the upper box selects for the different modmapper modes).
The graphic display shows different modulation amounts, positive and negative. The yellow/orange line is the modulation amount currently being output. The position of the yellow line is dependant upon which modmapper mode is selected and/or the modmappers mod source. You can also draw in the graph area - left click near the yellow line selects that point on the Y axis for editing, right click within the graph brings up some extra editing options.
Hope that helps.
The best way to see how it works is to assign it to a parameter and see what effect changing the dialogue boxes has (the lower 'modulator' box selects which modulation source modulates the modmapper, so, this is a mod source that may itself be modulated by a mod source - the upper box selects for the different modmapper modes).
The graphic display shows different modulation amounts, positive and negative. The yellow/orange line is the modulation amount currently being output. The position of the yellow line is dependant upon which modmapper mode is selected and/or the modmappers mod source. You can also draw in the graph area - left click near the yellow line selects that point on the Y axis for editing, right click within the graph brings up some extra editing options.
Hope that helps.
Last edited by hakey on Fri Aug 28, 2009 9:27 am, edited 1 time in total.
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- KVRAF
- 5234 posts since 25 Feb, 2008
The Sideband module I'm less sure about - I assume that it creates sidebands at fixed distance in terms of Hz from a signal of a given frequency. So, if you have a sine wave at 400Hz it creates sines at equal distance above and below 400Hz - if there's one at 200Hz there will be another at 600Hz. 'Mix' controls the amplitude of the sidebands, 'Freq' the distance the sidebands are from the original signal and 'Offset', I think, adds an offset in the Freq amount applied to each channel within the stereo field (but, I'm not so sure on that one -it may be panning the upper and lower sidebands into opposite channels 
).
That said, I am assuming that it produces a pair of sidebands (as happens with frequency modulation), but, it is called 'Sideband' - no 's', so perhaps it only adds a single sideband?
Oh, and it's an audio modulator (effect) not a source, so you need something producing an audio signal before it in the Voice Grid, otherwise it won't do anything.
).That said, I am assuming that it produces a pair of sidebands (as happens with frequency modulation), but, it is called 'Sideband' - no 's', so perhaps it only adds a single sideband?
Oh, and it's an audio modulator (effect) not a source, so you need something producing an audio signal before it in the Voice Grid, otherwise it won't do anything.
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- Banned
- 6129 posts since 9 Oct, 2007 from an inharmonious society
You can try this modmapper thing.
Right-click (ctrl-click-mac) the window in the mod-mapper.
Select "random", then right-click again to select normalize.
Then right-click the knob to the right of the Pan(in an osc,fm,or comb) and choose that MMap to modulate the panning to go from one side to the other with every key pressed.
If you use some of the other modes, you would want to add a modulator to the 2nd slot of the modmapper.
I use that mmap setup on the formant filter, and modulate the drive(vowel) with the mmap, through using the mod matrix.
You could see an example of it in my bank (below) under pad-Choir of Mice.
Look in the mod matrix and you'll see it set to the filter.
So you get a different vowel tone with every key pressed.
Have fun,
Michael
Right-click (ctrl-click-mac) the window in the mod-mapper.
Select "random", then right-click again to select normalize.
Then right-click the knob to the right of the Pan(in an osc,fm,or comb) and choose that MMap to modulate the panning to go from one side to the other with every key pressed.
If you use some of the other modes, you would want to add a modulator to the 2nd slot of the modmapper.
I use that mmap setup on the formant filter, and modulate the drive(vowel) with the mmap, through using the mod matrix.
You could see an example of it in my bank (below) under pad-Choir of Mice.
Look in the mod matrix and you'll see it set to the filter.
So you get a different vowel tone with every key pressed.
Have fun,
Michael
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- KVRAF
- 1617 posts since 11 Dec, 2008 from Minneapolis
Pretty sure you're correct, it's a single sideband. There's actually a really good explanation of a frequency shifter for the Uhbik-S in the Ubhik manual, SB is the same sort of thing - a frequency shifter just produces one sideband. Definitely is a lot like FM, I think one sideband can do a lot of things FM excels at in sort of less noisy, more controlled way.hakey wrote: That said, I am assuming that it produces a pair of sidebands (as happens with frequency modulation), but, it is called 'Sideband' - no 's', so perhaps it only adds a single sideband?
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- KVRist
- Topic Starter
- 43 posts since 2 Oct, 2007
Is my definition of sideband correct?
Single sideband: a new upper or lower frequency
Pair of sidebands: a new upper and lower frequency
Assuming it is correct the SB module creates a pair of sidebands.
Single sideband: a new upper or lower frequency
Pair of sidebands: a new upper and lower frequency
Assuming it is correct the SB module creates a pair of sidebands.
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- KVRAF
- 5234 posts since 25 Feb, 2008
Yes, looking at the output in a scope it is a pair of sidebands, one above and one below the signal - adding Offset turns these into 2 pairs panned across the stereo field. It also appears that the sidebands have different amplitude?
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- KVRAF
- 1617 posts since 11 Dec, 2008 from Minneapolis
Offset will do a stereo pair of frequency shifted output, but with no offset I just get one sideband mixed with original signal - unless mix is set to completely dry or wet. [e] Just tried it on 4kz, nvm . . . there's 2 bands but it's not at all like 2 FM sidebands, I'm going to assume that's something specific to the algorithm - with the 10hz the 2 bands are really close o.0
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- KVRist
- Topic Starter
- 43 posts since 2 Oct, 2007
If you set freq to a positive value the upper sideband will have a higher amplitude. Set freq to a negative value and the lower sideband will have a higher amplitude. Leaving freq on 0 and just using offset will keep them close in amplitude, although not the same.
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- KVRAF
- 1617 posts since 11 Dec, 2008 from Minneapolis
OK, before my brain melts, I'm thinking frequency shifting creates 1 sideband _unless_ there's feedback, in which case the amount of frequency shifting relates to the separation between the bands (since greater values -> bigger feedback swings); the SB module seems to have negative / positive feedback depending on which way the freq knob is turned.
But:
{-} Me
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>>-----[> the arrow
((o)) the target
Probably a little off!
But:
{-} Me
/|\
/\
>>-----[> the arrow
((o)) the target
Probably a little off!
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- KVRAF
- 5234 posts since 25 Feb, 2008
I'm fairly sure that it produces a pair of sidebands.
What I did was put put an FMO in the Voice grid - looked at in MicroSchope_slow, unsurprisingly, playing middle A gives just one peak (at 440Hz). I then added a Sideband module after the FMO - at default settings playing middle A still gives one peak. Then, with Range at 200Hz, by adding positive Freq amount you see a pair of sidebands separating from the main peak, one above and one below. The upper band is of greater amplitude (with negative Freq amounts this is reversed). Continue adding increasing Freq and the sidebands separate further from the main peak. Increase Mix to full and the amplitude of sidebands increases and the original signal peak disappears. Adding Offset cause the sidebands (as seen in MicroScope) to split, so that there are two pairs of sideband peaks. The distance between the peaks within each pair remains constant but as more Offset is added the distance between the pairs increases. I'm presuming that each pair belongs to one channel of the stereo signal (which MicroSchope has summed together).
I hope that hasn't been too brain melty
What I did was put put an FMO in the Voice grid - looked at in MicroSchope_slow, unsurprisingly, playing middle A gives just one peak (at 440Hz). I then added a Sideband module after the FMO - at default settings playing middle A still gives one peak. Then, with Range at 200Hz, by adding positive Freq amount you see a pair of sidebands separating from the main peak, one above and one below. The upper band is of greater amplitude (with negative Freq amounts this is reversed). Continue adding increasing Freq and the sidebands separate further from the main peak. Increase Mix to full and the amplitude of sidebands increases and the original signal peak disappears. Adding Offset cause the sidebands (as seen in MicroScope) to split, so that there are two pairs of sideband peaks. The distance between the peaks within each pair remains constant but as more Offset is added the distance between the pairs increases. I'm presuming that each pair belongs to one channel of the stereo signal (which MicroSchope has summed together).
I hope that hasn't been too brain melty
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- u-he
- 30215 posts since 8 Aug, 2002 from Berlin
It's supposed to do a single sideband, but completely the filtering out the second one takes up too much cpu. So I left it like that because it does the trick just fine