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Midi lag
Hooked up the ipad with my old Juno 106 via Zoom U-44 interface MIDI out.
Sending MIDI from Riffer and/or Helium from within AUM.
Audio out from Juno routed into input 1 of Zoom and coming into AUM as an audio input channel.
Disappointed that there is a noticeable lag between the AUM click and the notes I'm hearing playing back. i don't think it's audio latency as it still sounds late if i monitor the input signal (ie direct out from Juno). So it must be poor handling of MIDI by the Zoom and/or AUM?? Shouldn't be the ipad - it's a brand new Pro dammit!
Thoughts?
Comments
Which sample rate are you using?
iirc, Riffer drifts @44.1kHz, but is tight @48kHz.
Is that the new M1 iPad Pro?
yes new ipad pro 2021 M1 (hence disappointment!!)
I'll try @48kHz
cheers
Some iOS midi apps have timing issues that aren't iOS issues. If you have Atom 2, you might want to see if you experience the same issue as it is known to be pretty accurate in its timing and is decoupled from sample rate and buffer size in a way that some midi plugins aren't.
cool - will try that too.
What buffer size are you using in AUM? The higher the buffer size the greater the latency. The lower the buffer size the higher the CPU load. With a powerful device and not a zillion plugins, you should be able to get buffer size down to 128, possibly even to 64. You know you've gone too low when you start to get dropouts, which sound like crackling in the audio.
If your buffer size is higher than 256, this may account for the lag you're hearing.
I mean this happens with all “computers”, ipads are no exception (maybe only the Atari ST series has good timing?). I’ve literally spent 100’s of man-hours over the years obsessing about how to accurately sync my hardware to various computers (including ipads), in the end the only real, truly good timing I ever got was using a sample accurate audio-to-midi device like Innerclock SyncGen, E-RM, Expert Sleepers, etc.