KVR Audio

docbot · Post by **docbot** » Tue May 05, 2020 6:32 pm

I was wondering, if you have a soundcard that handles high resolution audio like 768 kHz, can you actually use that in your DAW or plugins?

I've never seen a kHz setting in a vst, so how does this work, can every plugin run at whatever kHz setting you throw at it, since the signal is created digitally anyway or will they only play nice up to a certain kHz frequency?

BertKoor · Post by **BertKoor** » Tue May 05, 2020 6:45 pm

A plugin has to accept whatever sample rate the host throws at it. The daw also has to work with sample rates supported by the (asio) driver of the audio interface. It's known to work with 44.1, 48, 88, 96 and 192 kHz. I don't see why not at 384 or 768 kHz, or 22, 16, 11 or 8 kHz.

Some plugins might bork. They might use precalculated filter coefficients.

jdnz · Post by **jdnz** » Tue May 05, 2020 8:55 pm

when you say 768khz I presume you're talking about DSD (as it's commonly associated with DSD and 768khz for PCM is just ridiculous). All DAWs and plugins operate using PCM - would require a fundamentl re-write of everything to operate on a DSD bitstream

fairlyclose · Post by **fairlyclose** » Tue May 05, 2020 9:11 pm

Izotope RX7 works at 384kHz - those sample rates are used for recording bats and insects. I have a mic that handles that and records straight into my tablet or phone https://batsound.com/product/u384-usb-u ... icrophone/

BertKoor · Post by **BertKoor** » Wed May 06, 2020 8:48 am

jdnz wrote: Tue May 05, 2020 8:55 pm when you say 768khz I presume you're talking about DSD (as it's commonly associated with DSD and 768khz for PCM is just ridiculous). All DAWs and plugins operate using PCM - would require a fundamentl re-write of everything to operate on a DSD bitstream

Yeah, VST's process PCM data only, not 1-bit streams. But DSD(64) streams single bits at 2.8 MHz. Where does the 768 kHz come from then?

My assumption was that the OP got there by just multiplying by two.

48 x 2 = 96
96 x 2 = 192
192 x 2 = 384
384 x 2 = 768

Agreed though, it doesn't bring much to the table, other than pushing aliasing artefacts far above bat range for ill-designed plugins.

jonljacobi · Post by **jonljacobi** » Wed May 06, 2020 4:25 pm

There is "audiophile" equipment out there that talks about 768kHz. DSD is 2.8MHz. For the OP, there's a very good primer on digital audio on xiph.org.

Yudaidhun · Post by **Yudaidhun** » Wed May 06, 2020 4:52 pm

I own PCM 768kHz Interface (Play only) with ASIO.
Reaper supports 768kHz and works.

CPU usage is really high.
16 synth run in 48 kHz = 1 synth run in 768kHz.
You can't use it for real time processing.

jamcat · Post by **jamcat** » Thu May 07, 2020 8:45 pm

fairlyclose wrote: Tue May 05, 2020 9:11 pm Izotope RX7 works at 384kHz - those sample rates are used for recording bats and insects. I have a mic that handles that and records straight into my tablet or phone https://batsound.com/product/u384-usb-u ... icrophone/

I need a stereo matched pair of those Bat-Mics.
Say goodbye to brittle hi-hats!

bungle · Post by **bungle** » Fri May 08, 2020 9:05 am

Not all VST have to work at whatever rate the host throws at them and in fact depending on the VST itself all kinds of strange things can happen if it is sent a samplerate that it is not specifically designed to work with, most are now designed to work up to at least 96khz, but that does not mean they all will, especially some older plugins.
The DAW certainly does not have to work at whatever rates the ASIO driver supports and again all kinds of strange things can happen if it is sent a rate that it does not support, again most DAWs are now predesigned to work with most common rates and some even work with rates that are above 96khz (Pointless)

768 kHz - Daws & Plugins