1 (edited by whiteletter 2020-02-25 18:17:10)

Topic: No Reported Latency Difference between 9632 and AIO

I recently picked up an RME HDSPe AIO card, to replace an RME HDSP 9632 in my main DAW, and move the old card to a spare.

While my main DAW has one PCI card slot, I thought I might as well upgrade for future proofing and for the better latency in the specs for the AIO card.

On the specs page for the 9632 RME HDSP reports:

Supported sample frequencies: Internally 32, 44.1, 48, 64, 88.2, 96, 176.4, 192 kHz. Externally 28 kHz - 200 kHz
8 buffer sizes/latencies available: 1.5 ms, 3 ms, 6 ms, 12 ms, 23 ms, 46 ms, 93 ms, 186 ms

And on the specs page for the RME HDSPe AIO:

Supported sample frequencies: Internally 32, 44.1, 48, 64, 88.2, 96, 176.4, 192 kHz. Externally 28 kHz - 200 kHz
8 buffer sizes/latencies available: 0.7 ms, 1.5 ms, 3 ms, 6 ms, 12 ms, 23 ms, 46 ms, 93 ms

So far on my first day testing the new AIO however, I have at least reported by my DAW the exact same latency. I am going to do further testing, after all it's only day one here, however I am a little surprised so far. Perhaps there's something I'm missing in setting things up or how this works?

RME HDSPe AIO: 32 samples at 48.0 kHz
Input Latency 1.60ms / 77 samples
Output Latency 2.31 ms / 111 samples

RME HDSP 9632: 32 samples at 48.0 kHz
Input Latency 1.60ms / 77 samples
Output Latency 2.31 ms / 111 samples

Re: No Reported Latency Difference between 9632 and AIO

As its half .. maybe one way vs RTL (round trip latency = both directions) ?

BR
Ramses
X10SRi-F, Win10 Pro 1909, Cubase, UFX+, Octamic XTC, ADI-2 Pro FS BE/R BE, RayDAT, ARC USB

3

Re: No Reported Latency Difference between 9632 and AIO

Over the years the driver's lowest buffer size was changed from 64 to 32 samples (the 9632 manual is older). The values listed as 'latency' equal the mathematical value of buffer size to sample rate. These values were also shown in the Settings dialog. The total round trip latency is of course different. That is explained in the chapter about Latency and Monitoring (AD/DA converter latency etc).

Regards
Matthias Carstens
RME

Re: No Reported Latency Difference between 9632 and AIO

MC wrote:

Over the years the driver's lowest buffer size was changed from 64 to 32 samples (the 9632 manual is older). The values listed as 'latency' equal the mathematical value of buffer size to sample rate. These values were also shown in the Settings dialog. The total round trip latency is of course different. That is explained in the chapter about Latency and Monitoring (AD/DA converter latency etc).


So The PCI 9632 old interface and PCI-E AIO inteface having the same preformance?

5

Re: No Reported Latency Difference between 9632 and AIO

Basically yes.

Regards
Matthias Carstens
RME