HID Phase Sync Issues

Regarding the main issue with Sync. Please note that for sync to function properly, djay needs to know the positions of the channel faders and crossfader. This can be an issue with External Mixer Mode devices that do not also send MIDI messages for the mixer controls. Thankfully the Reloop Elite does also send MIDI messages. So, it’s best if we test the sync functions using the built-in MIDI mapping and the v1.06 firmware.

Regarding your video recording question, I’m not sure I know what you’re talking about “test video recording with built in feature in djay Pro”. I would simply use the macOS screen recording tools: Take screenshots or screen recordings on Mac - Apple Support (CA)

Oh! I think you’re talking about this. This is for recording the output video when using the Video Mode of djay (music videos & visualizers). This is not a screen recording tool. You want to use the macOS screen recording tools I shared above.

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A post was split to a new topic: Songs Synced but displaying different BPMs

Here is also the video you asked me. Firmware version 1.06, Djay 5.6.2, Standard Midi Map.

Deck 2 was playing, I loaded deck 1 as instant doubles, put the crossfader in the middle, pressed sync on deck1, assigned master tempo to deck 1, then started to lower and raise the tempo with the tempo slider on platter 1.

Making this video I understand now a big difference, which can be obvious for a lot of people but for me it wasnt, even if I start to play a song on a deck, if at some point I hold the vynil to manipulate, scratch or drop it when I need it, and the fader is still on the other deck, with DVS and HID DJayPro can’t understand the master tempo. This can’t be seen on a controller cause if you hold the jog you still send an event when you press the play button so DJay knows what is playing or not.

I still want to dig deeper as I believe this is not the bottom of it but as far as I know now I have to say that the master tempo can be considered working fine.

I don’t understand how midi mapping and firmware could affect this kind of test but since you asked I know you know better and I complied, I still believe it’s happening the same in the other conditions. The difference I believe is that I made the test to adhere perfectly to your directions. Anyway this is really not important, I’d like to understand everything in the world but I have to take this as it is.

Besides from that Sync still has some issues as you can observe by yourself in the video, even tho I admit this was a pretty extreme scenario you can see happening a lot of weird situations.

Also by the end of the video, you will see that I switched the master tempo back again on deck 2 that’s why you’ll see a different behavior.

Last question, is there some log that we should extract to provide better directions when rootcausing an issue? In case I’d add the log to the next video when I find other stuff.

Hi again @Francecorre, I moved your other video and comment to a new topic: Songs Synced but displaying different BPMs (Phase DVS)

Regarding this topic,

  1. Can you please share a screenshot of your djay Settings>General>Sync Mode page?
  2. In your video, in addition to the crossfader in the center, do you have the channel faders up on both Deck 1 and Deck 2? Please note that a non-audible deck cannot be the Sync Master regardless of the MIDI command to Set Sync Master.
  3. As for log files, these are typically only useful if there is a crash or lock up.

Here I am @Slak_Jaw


  1. If I switch from BPM and beats to BPM it gets even weirder and less deterministic
  2. Got it. Both faders were up and crossfader in the middle
  3. Ok

Thanks for the additional info @Francecorre. Your Sync settings look good to me.

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