Ambience pulsating at steady rhythm

[msosnicki]

I have a question about an ambience algorithm - in both software and in hardware versions (both latest), I get the "pumping" feel at some values, and it's very regular.

To reproduce:

• noise from looper at max
• ambience at max
• spacetime 0.5

If I move spacetime above 50% it's better and becomes less of an issue. But for values below 50% (which should be just a reverse of the reverb tail, if I understand correctly?) the pumping is again very much heard - especially when approaching 50% and 0%.

It's quite annoying, as it can become very dominating whenever I use ambience, making some of the value ranges mentioned above unusable.

I tried playing with decay, autopan, sync etc, but nothing seem to influence it - it both software and hardware I get a stable 120bpm for the pumping rhythm.

Is this a characteristic of the Schroeder reverb algorithm, and is expected?

[hirnlego]

It's because of how the reverse buffer used when spacetime is < 50% is implemented, it has nothing to do with the reverb algorithm per se. I'm not sure what would be the alternative, I'd have to have a look at it again.