Unable to record at 768 kHz on Windows via ASIO

[goraelec]

Hi people.

Long story short, I build Audacity for Windows with ASIO support from the latest master at the time of writing. I have an RME ADI 2 PRO FS which is capable of 768 kHz recording an playback. The trouble is, when I set this sample rate both in ASIO control panel and in Audacity, the device drops back to 384 kHz for some reason. Can someone help me figure out why?

[goraelec]

Here's what I found out in Audio Device Info:

Code: Select all

Device ID: 12
Device name: ASIO MADIface USB
Host name: ASIO
Recording channels: 2
Playback channels: 2
Low Recording Latency: 0.000725624
Low Playback Latency: 0.000725624
High Recording Latency: 0.000725624
High Playback Latency: 0.000725624
Supported Rates:
    44100
    48000
    88200
    96000
    176400
    192000
    352800
    384000

[steve]

1) Have you tried recording at 768 kHz with other software? Does it work at 768 kHz in other software?
2) Does it matter? Do you really need to use higher than 96 kHz?

Not directly related to your question, but I found an informative review of the RME ADI-2 Pro here: https://www.hifizine.com/2018/07/rme-ad ... -overview/

[versusliveact]

Hi,

Maybe You already did it but I try to figure out.
So when You create a new projet in Audacity the default sample rate is 44100 hz You can see in the left corner down,the maximum is 384000 but you can write it manually the 768000hz what you wish in this timey or you can set the default sample rate in the preference menu in 'quality' tab,choose the 'other' and you can type 768000hz what will keep the project and the RME card the same sample rate.

hope it helps!

(another person who lost betwen sample rates)

[goraelec]

1) Have you tried recording at 768 kHz with other software? Does it work at 768 kHz in other software?
2) Does it matter? Do you really need to use higher than 96 kHz?

1) Not really, because I'd have to buy that piece of software, but I know that playback works at this SR by testing on Mac. However, neither Win, nor Mac and Linux record ad this sample rate.
2) Yes. Don't want to go into details of this project, but I need it for measurements and for recording some HF audio that will be slowed down 10x

Maybe You already did it but I try to figure out.

I did try it and it didn't work, otherwise I wouldn't have written in, but thank you for doing a sanity check on me

[steve]

I need it for measurements and for recording some HF audio that will be slowed down 10x

Did you read that link that I posted about the RME ADI-2 Pro? According to that, the best ultra-high frequency response is at a sample rate of 384 kHz.

[versusliveact]

1) Not really, because I'd have to buy that piece of software, but I know that playback works at this SR by testing on Mac. However, neither Win, nor Mac and Linux record ad this sample rate.

I know it is not a solution but You can download and try Reaper software for free and You can test the record.

[goraelec]

I know it is not a solution but You can download and try Reaper software for free and You can test the record.

Yep. It does work and it passes 32-bit test. Thanks

[versusliveact]

Yep. It does work and it passes 32-bit test. Thanks

Ok,nice!
I am also testing one 768khz converter,unfortunately not with the RME ADI 2 PRO,the price is to high to my wallet.
So I hear difference in a quality some cases if I go higher sample rates with soft synths,for example Native Instruments Reaktor,or Massive.
Can You please test any software synths or recording sound with microphone any source in 384khz - 768 khz is it make any noticable difference with RME?

Thanks

[goraelec]

It makes a difference when applying any sort of correction that would benefit from high sample rate (noise reduction, time stretching etc.)

But once I have a clear signal, I'd downconvert to 192 kHz because accoridng to spectrum analysis, my microphone+preamp doesn't record anything past 40kHz that isn't noise, so 96 kHz would be the bare minimum to get an accurate recording. Does that make sense to you?