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How to make tempo synced LFO in miRack ?
I guess, if LFO has V/OCT input, i is able somehow to make it tempo-synced, to make it running, let's say, on 1/4 speed ... how to do it ?
Comments
No idea but connecting the beat input to reset on the LFO will restart it every beat and depending on the speed of your LFO can get you part way there.
Certainly started a productive bit of experimentation for me this morning.
V/Oct doesn't mean tempo synced. What it basically means is increasing the CV input by 1V doubles the LFO frequency. And if the LFO allows you to go up to audio rate it could be used as a VCO that way.
You need to pick an LFO with a clock or sync input of some kind. For instance Audible Instruments Percussive synth (Mutable Instruments Peaks) in TAP mode will sync to whatever you feed to trig with clock division/multiplication. The Audible Instruments Tidal modulators (based on Mutable Instruments Tides) also can be synced.
You want to use the beat or bar outputs on the HOST SYNC module. Then you need to find an lfo with a clock cv input.
These 7 lfos have clock inputs:
Some lfo's like the BPM LFO, Tidal Modulator, and Chopper have clock dividers and multipliers. These can be cv or midi automated to produce awesome syncopation.
If the LFO doesn't have a divide/multiplier, you can use a clock divider module like BEATOVNIK to output different divisions from your HOST SYNC module.
Also, a word about lfo reset. Reset will bring the lfo back to the beginning point of its phase. Usually you would use the beat output of HOST SYNC to reset the lfo's phase. By setting the lfo to the right frequency you could indeed sync it to the beat, but it's fiddly, and changing tempo/frequency would throw it off again.
edit:
the v/oct input on an lfo is like the v/oct input on an oscillator. E.g., connecting it to your pitch cv will effectively key track the lfo - speeding up when you play higher notes, slowing down with lower notes. You might be able to find tempo divisions this way, but the lfo is still free running, so it likely wouldn't line up with the beat (which is where reset would in come to play). Nothing stopping one from doing it that way, but it wouldn't be ideal.. In this scenario a CV sequencer would be a good candidate to automate the lfo speed and reset its phase.
the bpm lfo is my-go lfo because it has a convenient tempo multiply/divide within the module itself so you dont need a clock divider to make it go slower or faster.
@aleyas big thanks for detailed descriptions, now everything is clear ! Beatovnik is cool but also that BPM Lfo looks handy ..
Yes that's what I meant by "can get you part way there".
Speaking musically though it is a nice way to introduce sub rhythms into sequences and by modulating the speed of the LFO it allows for quite useful LFO shapes away from the output of a strictly synced LFO, while still conforming to the beat.
Great idea! Now I want to take a free running lfo, modulate it with a slow tempo synced lfo (2-4 bar), and reset it on the beat - controlled chaos! ..or take it a step further and modulate the phase of the free running lfo with an even slower (4-8 bar) tempo synced lfo. Mmm
Hm, solution with beatovnik doesn't work for me. First problem is that Beatovnik needs host app running, if playback stops, it stops too. So i cannot play patch when host playback is stopped. Another problem is that it is totally random. I tried vsrious outputs (multiple/division) from Beatovnik connect to Tidal but i got unexpectes weird results.
Here my example. What i want is to modulate Intrezone's filter with 1/3 LFO running SAW wave with descending phase (eg saw startimg on top with LFO trigger), with start phase synced to note on (gate). What and how i sound add to patch to have this working no matter if host playback is runnig or stopped ?
Thanks for any advice.
Ah yeah, the host does need to be running to generate clock from HOST SYNC. (this is gonna be kinda long. Tl:dr at bottom)
For sync / playback independent of the host use a CLOCK module. Clock modules are free running.
There are many clock modules you can choose from - for simplicity's sake Master Clock by MenTal is good.
Now you may be wondering.. it's great I can sync my lfos without the host running.. but now when I record, the tempo is out of sync with BM3!
To alternate between HOST SYNC and a MASTER CLOCK you can use a switch. I recommend Triggered Switch 8 to 1. That will allow you to toggle between Master Clock and Host Sync, for when BM3's transport is off, and when it's on during playback / record.
To use Triggered Switch:
Host Sync beat > Triggered Switch input 1
Master Clock beat > Triggered Switch input 2
Triggered Switch output > Tidal Modulator2 clock input
Now just click the button in the middle and you can switch to whichever clock source you want.
Now for the LFO.
Try using Tidal Modulator 2. The frequency knob acts as a divider while it is clock synced. You can get 1/3 or triplet feel by adjusting the 'frequency' position. Beatovnik was only a solution for lfos without tempo divisions.
For a pure saw wave lfo (start high, end low), set the 'slope' to its left position. Left is saw, center is triangle, right is ramp.
If you want to route the lfo to a destination, use the 2nd output from the left. I believe that's the standard bipolar output.
You don't need to worry about phase position while the lfo is synced to clock. But you can route RTRG from the Midi-1 module > reset on the lfo. If you're not playing exactly on the beat, this will still keep your attacks sharp starting from 0 point of the lfos phase. (I didn't do that in the picture.)
Otherwise, you can use these settings:

tl;dr: you only need 2 more modules to make your current setup work: a free running master clock, and a triggered switch. Set your master clock to the same tempo as your BM3 project. Toggle between the free running clock and the Host Sync with the triggered switch buttons. And - the lfo is a saw wave at the lefternmost 'slope' position.
One more thing about the triggered switch. You can set it to automatically switch from Host Sync to Master Clock (free running).
Route Host Sync STOP to trigger the input holding the Master Clock's beat tempo
Route Host Sync RUN to trigger the input holding the Host Sync's beat tempo.
With this setup, when you press play/record in BM3, that will trigger the switch to the Host Sync position. When you press stop in BM3, that will trigger the switch to the Master Clock position. Just ensure the BM3 project and master clock tempos are set the same rate.
Either of the Tidal Modulators* have this (Frequency is a divider/multiplier when they are synced to clock), along with the ability to modulate the multiply/divide via the FM input and attenuverter. So you could for instance feed a clock divided gate (or sequencer, or another LFO, or even itself) to FM and have the LFO speed switch to different multiples/divisions periodically. And you should be able to still reset via the trigger input when they are clocked as well.
*as well as percussive synth - which isn't a very good name for it IMO as the analog drum models are sort of an add on for a multifunctioned dual triggered Env/LFO module with a couple other modes as well. It only has a trigger/gate/clock input for each channel though, so it doesn't allow for CV modulation of the division/multiplication described above.
@aleyas big thanks ! Everything now works like a need, you helped me a LOT !