1 (edited by Atardecer 2021-06-22 08:32:09)

Topic: Strange Behaviour when changing buffer size

I have a new HDSPe AIO Pro. I've noticed some unusual issues when chaning buffer sizes. This is independent of DAW - I use both Cubase & Ableton and it happens in either.

I regularly bump up the buffer size when getting into the last bits of mixing. So I might put it up to 1024. When I try to put it down though, the card basically stops outputting audio altogether. The system and DAW is still recognising and reporting it's using the card, but it does not output audio. If I put it back up to 1024 or higher it's fine. I've found that when this happens the lowest I can go is 512 for whatever reason. If I set to, say 64 samples, it sort of does this intermittent clicking sound. 128 or 256, no sound at all. Above that, sounds absolutely fine.

I should say here this is with a session playing back one audio track - it's not because of CPU overloads or maxing out the system or anything like that. The only way to "reset" this is to reboot. If I set it 128 samples and reboot, it will be fine at that buffer size that was previously problematic for that boot session. As long as I don't increase it again. Basically, whenever I increase the buffer size I cannot decrease it again until rebooting. This is obviously frustrating.

Driver 4.36

Thanks

Windows 10 Pro
i7-6900K 3.20GHz
64gb RAM, All SSDs
RME HDSPe AIO Pro

Re: Strange Behaviour when changing buffer size

When this happens, do you see audio in the Software Playback section in Totalmix? If not, it seems to be the software no longer playing back correctly, not the card... Is this also reproducible with Reaper?

Regards
Daniel Fuchs
RME

3

Re: Strange Behaviour when changing buffer size

Looks like your PCI Express bus is not working as it should. Does that motherboard have another free slot that you could try?

Regards
Matthias Carstens
RME

4 (edited by Atardecer 2021-06-23 09:53:55)

Re: Strange Behaviour when changing buffer size

RME Support wrote:

When this happens, do you see audio in the Software Playback section in Totalmix? If not, it seems to be the software no longer playing back correctly, not the card... Is this also reproducible with Reaper?

Bit hard to explain. If I go for say, 64 samples, audio is very badly garbled, and there is a constant clicking from the left channel. If I go for 128 samples, its just very garbled or sometimes nothing at all. It sounds similar to when your system is too taxed with too low a buffer setting, but ASIO performance is not reporting anywhere near being stressed. If there is siund, it is in also in totalmix. If no sound, nothing in totalmix. Yes, pretty much any DAW. If I immediately bump it back up to 1024 its fine without a reboot needed. But yeah If I leave it at 128 samples and reboot, at that buffer size, its absolutely fine.

For lack of a better explanation, it seems to start becoming garbled when buffer size is set below the original buffer size I had when booting up the computer.

As for PC slots, I think it's currently on the lower most slot (closest to PSU). I'll start with driver/firmware update, then move slots and see how it goes.

Windows 10 Pro
i7-6900K 3.20GHz
64gb RAM, All SSDs
RME HDSPe AIO Pro

5 (edited by scare 2021-06-24 10:42:52)

Re: Strange Behaviour when changing buffer size

I´m having exact the same problem since windows 1909 , but with my multiface 1.
After a couple of hours working i cant go lower than 256 samples (the buffersize i usually work on)  before these strange dropouts are happening. Everything sounds robotic and clicky like total cpu overload.
I also have the exact same click from the left channel as described.

When i just sign out / sign in  into windows its back normal.