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Spread is also used to reset the position of the channels on the light ring. During normal usage of locking, unlocking, rotating 
and spreading, the channels can be mixed up in any imaginable order. The easiest way to get them back to a known starting 
place is to unlock them all and turn the Spread knob. The Spread CV jack can be used as “Reset position” jack: giving a 
trigger into this jack will reset the unlocked channels' positions to the Spread pattern set by the Spread knob.

Morph

Morph is another central feature of the SMR. Anytime the channels are rotated or spread, the SMR performs a cross-fade 
from the current spot to the new spot. Morph controls the duration of the cross-fade. At minimum, the cross-fade is almost 
instant, a few microseconds. At maximum, the cross-fade is one second long. Thus rotating all the way around the light ring 
would take 20 seconds. 

Morph is real-time, so adjusting it in the middle of a cross-fade immediately changes the speed of the cross-fade. Thus, if you 
have a slow Morph time and queued a dozen or so rotations, if you don't want to wait a dozen or so seconds for them to 
happen, you can just turn Morph down and they'll happen much quicker. Another trick with Morph is to send a rapid stream of 
triggers into the Rotate trig jack while adjusting Morph knob or CV. As more CV is applied, the rotation will slow down, and 
with less CV it will speed up.

Morph also controls the cross-fade time when changing scales. This applies to changing scales with the Scale CV jack, or by 
manually turning the ROTATE knob in scale mode. Morph controls the amount of slew when the CV Slew switch is thrown 
(See CV Slew section).

Locking

Locking is a powerful way to keep one or more channels from changing, while allowing other channels to by dynamic.
To lock a channel, tap the Lock button above that channel's slider. When the channel is locked, the button will be lit. 
Tap the button again and the channel will unlock. When locked, a channel will not change its center frequency. The channel 
will be impervious to rotating, spreading, changing the scale or bank, or the Freq Nudge knob or Freq jack. The slider and the 
Level CV jack will still control the channel's output level, and if the channel is not Q-locked then the RES (Q) knob and jack 
will still change how the channel is filtering and resonating. See below regarding Q-lock.

Lock jack

You also can lock a channel using a gate or trigger signal. There are two Lock jacks located near the 135 | 1 and 246 | 2 
switches. Like the Freq jack and Freq Nudge knob, the channels that are effected by the Lock jack can be selected using 
these switches. The rising edge of a gate or trigger signal will cause the selected channels to invert their lock state. Thus, 
locked channels will unlock and unlocked channels will lock.

Q-lock

Q-locking is an advanced feature that locks the channel's Q or resonance setting. To 
Q-lock a channel, hold the Lock button down while you turn the RES (Q) knob. When 
the RES (Q) knob is where you want the channel to be locked, release the Lock 
button. The Lock button will now flicker to indicate it's Q-locked. If the channel is also 
frequency locked (normal locking) then the Lock button will be mostly bright and will 
flicker off periodically. If the channel is not frequency locked then it will be mostly off 
and flicker on periodically. 

To turn off Q-lock for a channel, tap the Lock button to frequency lock it, and then tap again to unlock frequency and Q. If the 
channel is frequency locked and Q-locked, and you just want to clear the frequency lock, hold the Lock button down for two 
seconds. To change the Q setting of a Q-locked channel, hold the Lock button down and turn the RES (Q) knob to a new 
position and then release the Lock button.

Env Out jacks

Env Out jack signal, at the three positions of the Fast | Slow switch 

Fast envelope 

Trigger

Slow envelope

Each channel has an Env Out jack which outputs a CV that tracks the frequency content. This is useful for beat-syncing, 
vocoding, spectral transfer, or controlling other modules with triggers or CV based on the frequency (spectral) content of an 
audio signal.
Next to each Env Out jack is an LED that shows the signal present on the jack. A brighter light indicates more signal. The 
color of the Env Out jack also matches the channel's color on the light ring.

Fast | Slow: Envelope modes and Trigger mode

The three-way Fast | Slow switch to the right of the Env Out jacks selects whether the jacks output CV envelopes (fast or slow 
tracking) or triggers (center position).
In Envelope mode, the jacks output a CV whose level is proportional to the amount of that channel's frequency present on the 
audio input. For example, if the channel is set to 440Hz, any time the input signal contains 440Hz, the Env Out jack will output 
some CV: more voltage when the 440Hz is louder and less voltage when it's less present.
When the switch is set to Fast (left), the signal is tracked rapidly and small nuances are output. With it set to Slow (right), the 
output is averaged such that small variations are smoothed out. 
When the switch is in the center position, the Env Out jacks are in Trigger mode. Trigger mode also tracks the frequency 
content of the audio input signal, but it outputs triggers instead of CV. Whenever the amount of frequency present exceeds a 
certain threshold, the jack will send a trigger. The jack will remain high as long as the frequency content stays above the 
threshold. This is very useful for beat-syncing or triggering external modules that track percussive content of an audio signal 

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Summary of Contents for Spectral Multiband Resonator

Page 1: ...ts outputs and a host of unique features allows for many uses Create beautiful moving chord structures quantized to selectable scales Process audio like a classic filter bank EQ Pluck ping strike to ring like a marimba gong or membrane Beat sync to an audio track triggering modular sounds in sync with original audio Vocode outputting spectral data to a second SMR Re mix tracks Harmonize to audio Q...

Page 2: ...v Out LEDs Brightness of each light shows level of each filter Resonance Q Res Q CV jack 0 to 5V Knob offsets CV jack Stereo input and output divided into even odd bands Odd input jack and Even output jack serve as Mono in out Clipping LED between IN jacks flickers when input is clipping about 20Vpp or 10V Rotation shifts frequency pattern up or down Rotate Clockwise trigger input 2V threshold Rot...

Page 3: ...xponential decay and different timbral qualities when plucked Freq jacks no longer track 1V oct in this mode Slider LEDs can be selected to display clipping and level or just level Firmware can be updated by playing encoded audio files from a computer into the SMR Specifications 26 HP Eurorack format module 16 to 16pin eurorack power cable included 0 95 24mm maximum depth Power consumption 12V rai...

Page 4: ...tating and pushing different sliders up and down you can make different chords Play with Morph as you continue to turn the ROTATE knob Morph sets the speed at which rotation happens With Morph at 100 when you turn the ROTATE knob the SMR will slowly fade from one position to the next With Morph at 0 the SMR will instantly jump from one position to the next Play with Spread which controls the numbe...

Page 5: ...the sliders to adjust the level of each note Input another trigger source into Rotate Trig or Rotate Trig If you don t have another trigger source you could input an LFO or envelope 0 to 5V into Rotate CV In and the rotation will track the waveshape of the incoming CV Play with slowing down the rotation from the external triggers by turning up Morph Try setting the rotation trigger source super fa...

Page 6: ...hile holding down the Lock button The Lock button will be lit if the channel is locked and also flicker if it s Q locked If you don t lock the Q then the channel s resonance will be controlled by the RES Q knob and jack along with all the other channels with unlocked Q Repeat this process steps 5 7 for channels 2 6 Note that for channels 2 4 and 6 the Freq Nudge knob on the right is used while for...

Page 7: ...e it depends on the pitch of the kick you re trying to tune into Set Freq nudge to dial in a frequency in between two rotation spots Turn Q up to narrow the band Around 50 is a good place to start for syncing to drum sounds Set the Level slider to set the threshold at which the trigger fires If you set it too high the Env Out light will stay on and it it s too low it ll stay off If the slider seem...

Page 8: ...hnique outlined in the Re mix patches setting the note scale bank and resonance of each channel on both SMRs Usage Channels Six resonant filters The core of the SMR is six resonant band pass filters The six channels take their inputs from the audio IN jacks and their outputs are mixed together using the sliders and Level CV jacks The mix is then fed to the audio OUT jacks The audio IN jacks are no...

Page 9: ...ency for instance with a stereo input where you want the same filtering to happen to both left and right you can rotate them to adjacent spots on the light ring and turn Freq Nudge all the way up for the lower channel Alternatively you can program a custom scale with duplicate frequencies Freq Nudge knobs There are two Freq Nudge knobs one for the odd channels and one for the even channels A switc...

Page 10: ...uency of any of the channels that channel will ring and continue ring for a bit after the VCO has left that frequency When the resonance is low the six channels act more like band pass filters Each slider controls the volume of that band If the bands are spaced evenly across the range of human hearing then the SMR will function like a graphic EQ If the bands are rotated or swept up and down in fre...

Page 11: ...tive in the range of 0V to 5V so each rotation step has a window of 0 25V Applying 0 25V will cause the channels to rotate one step clockwise Dropping back to 0V will cause them to rotate back one step counter clockwise Applying 1 0V will result in the channels morphing four positions clockwise Dropping from 1 0V to 0 75V will cause them to rotate back one step This kind of rotation is different t...

Page 12: ...If you unlock that channel it will keep the same bank but when you change the bank again it will join the same bank as the rest of the unlocked channels Scale CV The scale can be changed via CV using the Scale CV jack Voltages in the range of 0 to 5V are accepted Since there are 11 scales in each bank a voltage increase of 0 45V causes all unlocked channels to move to the next scale Likewise a vol...

Page 13: ... the selected channels to invert their lock state Thus locked channels will unlock and unlocked channels will lock Q lock Q locking is an advanced feature that locks the channel s Q or resonance setting To Q lock a channel hold the Lock button down while you turn the RES Q knob When the RES Q knob is where you want the channel to be locked release the Lock button The Lock button will now flicker t...

Page 14: ...er LEDs do a sequential animation and the light ring slowly filling up with lights and then clearing then filling up again Do not interrupt the process You can monitor the audio by listening to the evens Lock jack or the audio OUT jacks 5 If at any time two of the Lock lights turn on channels 2 and 3 or channels 2 and 4 and the other lights stop animating then an error has occurred Verify the cabl...

Page 15: ...mount of red the second slider controls the amount of green and the third slider controls the amount of blue Billions of colors can be chosen with these three sliders When you find a color you like lock the channel and unlock the next channel you want to edit You also can edit multiple channels at once by unlocking them all while adjusting the sliders This is a quick way to set all the channels to...

Page 16: ...ntains intervals selected from Wendy Carlos s non octave repeating Gamma scale spanning roughly 20Hz to 20kHz 6 17 note per octave yellow The first scale starts at 13 75Hz and each note is equally tempered to a 17 note octave Each scale is one octave above the previous 7 Chromatic purple The first scale starts at E2 82 4Hz and each note is one semi tone above the previous Each scale spans an octav...

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