Juno 66 MIDI timing issues

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Drywsef
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Juno 66 MIDI timing issues

Post by Drywsef » Thu Apr 02, 2020 11:42 pm

Since installing the Juno 66 mod on my Juno 6, I’ve noticed that the timing of otherwise perfectly in-time MIDI sent to the Juno produces sounds that are somewhat out of time. It’s especially apparent with fast parts and arpeggiated sounds. Is this a known issue with the mod?

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tubbutec
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Re: Juno 66 MIDI timing issues

Post by tubbutec » Sun Apr 12, 2020 3:12 am

Depends on what kind of delay you are seeing. What are you comparing it against?
A midi note on or off message takes 1ms, so just from that you get a delay. Depending on your midi interface this might be a bit worse.
The main hardware control loop of the Juno is about 2ms long. This adds another 2ms delay and about the same amount of jitter.

Drywsef
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Re: Juno 66 MIDI timing issues

Post by Drywsef » Tue Apr 21, 2020 2:06 pm

It seems that the email out of timing jitter I’m getting is substantially worse than 2ms. I’m feeding midi to the Juno 66 from my Axiom 49 via midi out. I don’t seem to have this issue with other synths I use this way. What can I check on the Juno 66?

Drywsef
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Re: Juno 66 MIDI timing issues

Post by Drywsef » Tue Apr 21, 2020 2:07 pm

I am comparing the timing against quantized midi I am sending out of pro tools.

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tubbutec
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Re: Juno 66 MIDI timing issues

Post by tubbutec » Tue May 19, 2020 3:57 am

Hi,
we changed some timing values in the newest firmware (1.28). Please try and see if this fixes your problem.
https://tubbutec.de/tubbutec-firmware-updater/

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