[sdiy] Generating a large number of CV outputs

[brianw]

Ah: To use the correct terminology, I saw images above 22.05 kHz, and it's basically impossible for these artists to have been running the converters on their laptops at any sample rate above 44.1 kHz, so it wasn't part of the digital generation.

I regularly see aliasing in recordings, and usually chalk that up to samples, digital generation, vintage gear, and who knows what else. Anything below 22.05 kHz would be difficult to identify as to its original source.

Basically, if I record at 48 kHz or higher, I can see a mirror image of the linear spectrum reflected around 22.05 kHz.

Brian


On Dec 10, 2023, at 2:29 PM, Mike Bryant <mbryant at futurehorizons.com> wrote:
> I'd vote for it being digitally generated aliasing - all too common a mistake.
> 
> From: Synth-diy <synth-diy-bounces at synth-diy.org> on behalf of Gordonjcp <gordonjcp at gjcp.net>
> Sent: 10 December 2023 21:33
>  
> On Sun, Dec 10, 2023 at 11:44:11AM -0800, brianw wrote:
> > 
> > I've recorded enough live electronic music performances to know that there is a surprisingly large number of commercial products out there with digital-to-analog conversion that has insufficient reconstruction filtering, as evidenced by the horrible aliasing. Granted, you have to record higher than 44.1 kHz to see this, since most DAC hardware is running at least that sample rate or higher.
> 
> How can you tell that's down to poor reconstruction filtering, as opposed to generated aliasing from the numerical side?
> 
> -- 
> Gordonjcp