03-26-2021, 11:03 AM
I don't have a Korg Volca Beats, so I downloaded the manual from the web. According to the manual, it produces a 5V pulse for 15 ms on each step. Since there are 16 steps which appear to be spread across 4 beats, my math indicates that the Volca creates a 4 PPQ clock. The NDLR manual says that the NDLR expects a 5V clock at a rate of 24 PPQ. This suggests that the NDLR will be operating 6x too slow when compared to the Volca.
To test this, I threw together a crude circuit to simulate the Volca consisting of two 555 timers. This generated a 15 ms pulse every 500ms. Equivalent to the Volca running at 30BPM. My NDLR reported this as 5.1BPM. Seems to work! As a further check, I sent a clock out of my deluge and it was read by the NDLR exactly correct.
Pulse waveform of test circuit:
If you are having issues beyond six times too slow, there are additional things to investigate. We don't know the input impedance or minimum acceptable level for the NDLR, or the output impedance of the Volca. But experiments can be run to see if an inordinately high output impedance of the Volca would render the NDLR incapable of detecting the clocks.
I should note that I do not work for Conductive Labs, so nothing I say is binding. I'm just a satisfied customer who hates to see queries go unanswered.
HdK
To test this, I threw together a crude circuit to simulate the Volca consisting of two 555 timers. This generated a 15 ms pulse every 500ms. Equivalent to the Volca running at 30BPM. My NDLR reported this as 5.1BPM. Seems to work! As a further check, I sent a clock out of my deluge and it was read by the NDLR exactly correct.
Pulse waveform of test circuit:
If you are having issues beyond six times too slow, there are additional things to investigate. We don't know the input impedance or minimum acceptable level for the NDLR, or the output impedance of the Volca. But experiments can be run to see if an inordinately high output impedance of the Volca would render the NDLR incapable of detecting the clocks.
I should note that I do not work for Conductive Labs, so nothing I say is binding. I'm just a satisfied customer who hates to see queries go unanswered.
HdK