I am currently experimenting with different FM setups with the ER-301 and other units and have been trying to sync an external oscillator with the ER-301 (ER-301 as leader, Mangrove Oscillator as follower). I am structuring it this way as I want the ER-301 to be carrier and the mangrove to be modulator.
The test is to sweep the frequency on the ER-301 oscillator and see if the follower oscillator increases frequency as well. The resulting frequency tracks accordingly but has a lot of unwanted jitter, more prominent in the super low and higher frequencies.
I have also tried this with a variable sample player with a single cycle square waveform to ensure to provide a steep rising edge. I get similar results.
Is this due to aliasing? If so, I assume this is not ER-301 specific. Are there tricks to help improve this?
To double check to see if the follower oscillator could sync, I used another analog osc to run the same test and get better results.