delay compensation

This forum is for discussing the Reason Rack Plugin, the version of the Reason rack that runs as a VST3, AU, AAX in other DAWs.
Dave Beep
Posts: 69
Joined: 16 May 2020

Post 05 Feb 2024


I'm using the reason Rack effect plugin in Live and it is not reporting delay compensation correctly.

According to Ableton, it adding using 64 samples / 0.73ms latency.

I am having to add around 27.5ms extra compensation manually to get the track to sync.

The effects in the rack are:
- Polar Dual Pitch Shifter
- Channel Dynamics

This is using Reason 11 and Ableton live 10.

Is this a known issue? Is it fixed in R12?

Dave Beep
Posts: 69
Joined: 16 May 2020

Post 05 Feb 2024

OK so stupidly I googled and read a bit after posting this. Polar is not even delay compensated within Reason standalone and or even internally within it's own routing of the dry signal. I assume the issue is specific to that device.

Posts: 3945
Joined: 20 Oct 2017
Location: Norway

Post 05 Feb 2024

Yeah polar is that weird kid at school. He's awesome once you get to know him! 😄

Posts: 1
Joined: 01 Jun 2023

Post 27 Feb 2024

neither the dry signal routing nor the standalone version of the program does Polar use delay compensation. It seems that the problem is isolated to that particular device.
run 3

Posts: 19
Joined: 01 Jul 2024

Post 01 Jul 2024

Polar came out before delay comp was a thing in Reason, so there is a buffer!

Reason Studios could update it to fit in to the latest versions of Reason as real time FX but it appears to be a low priority and something they don't do often with old RE's.

You're not the only one who's gutted!
Can't login to my old profile for some reason :?

Posts: 19
Joined: 01 Jul 2024

Post 06 Jul 2024

Just checked the manual which says:

This is best suited for polyphonic audio and complex sounds. “Slow” mode has the highest latency (typically around
96ms) because it needs time to correctly analyze the frequencies in complex sounds.
• Medium
This is best suited for bassy monophonic sounds and also for drums and percussion. “Medium” mode has a little
higher latency than “Fast” mode (typically around 48ms) because it should also be able to accurately detect lower
• Fast
This mode is best suited for less bassy monophonic sounds, like vocals. “Fast” mode has the lowest latency
(typically around 24ms) because it’s not optimized to detect low frequencies.

Typically around makes it sound as though it's variable! Anyway they could have at least printed it on the back of the device instead of hiding it in the manual.
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