Possible issue with LFO sync SM One

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The LFOs in SM One do not behave as expected.
They run slightly faster than host sync.
They also need to be set at 1/2 the desired rate to be close.

Easy to reproduce.
Project tempo 60 BPM.
Create an 8 measure midi item of one continuous note, say C1.
SM One Init patch, default filter on, cutoff all the way down, LFO 1 to filter cutoff all the way positive.
LFO 1 sawtooth set to SYNC on, 1/8th.
This will give you filter opening all the way at near the 1/4 note repetition.

I also used the same settings on SM 2.9 except the LFO rate was @ 1/4
Here is the start of the 8 measures, SM One the top green one, SM 2.9 the bottom waveform
Image
And here is the end of the 8 measures. The SM One is about an 1/8th note ahead whereas SM 2.9 is consistent.
Image
I tried l triggering modes, poly/mono/global and different shapes, sine and saw down and all exhibit the same behavior of needing to be set at 1/2 desired speed and drift out of time with the host. The same results happen using LFO 2 as well.

SM 2.9, Hive2 demo and a few other synths were tested and they preformed as expected. SM One was only synth that needed to be set @ 1/8th notes to get 1/4th note repeat and it was the only one out of sync. So I do not feel that it is an issue with my system of Reaper 6.0.X Win10x64.
Win10 x64, Reaper 6.XX x64, i5-3330, 8gb ram, GTX-970, UC-33, Panorama P4, Wharfedale Diamond 8.2 and JVC HA-RX700

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Last edited by claudedefaren on Thu Apr 15, 2021 7:22 pm, edited 1 time in total.

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Frostline wrote: Wed Apr 08, 2020 4:02 pm The LFOs in SM One do not behave as expected.
They run slightly faster than host sync.
They also need to be set at 1/2 the desired rate to be close.

Easy to reproduce.
Project tempo 60 BPM.
Create an 8 measure midi item of one continuous note, say C1.
SM One Init patch, default filter on, cutoff all the way down, LFO 1 to filter cutoff all the way positive.
LFO 1 sawtooth set to SYNC on, 1/8th.
This will give you filter opening all the way at near the 1/4 note repetition.

I also used the same settings on SM 2.9 except the LFO rate was @ 1/4
Here is the start of the 8 measures, SM One the top green one, SM 2.9 the bottom waveform
Image
And here is the end of the 8 measures. The SM One is about an 1/8th note ahead whereas SM 2.9 is consistent.
Image
I tried l triggering modes, poly/mono/global and different shapes, sine and saw down and all exhibit the same behavior of needing to be set at 1/2 desired speed and drift out of time with the host. The same results happen using LFO 2 as well.

SM 2.9, Hive2 demo and a few other synths were tested and they preformed as expected. SM One was only synth that needed to be set @ 1/8th notes to get 1/4th note repeat and it was the only one out of sync. So I do not feel that it is an issue with my system of Reaper 6.0.X Win10x64.
Hi Frodstline,

Does your LFO speed adjust to full? I think issue is coming from there. Could you adjust LFO switch full and try again?

All the best.

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