IR formats....

[d.healey]

I use 24bit 48Khz

[Lindon]

@ustk - hmm, seems logical - but experience is - he made them as 24-bit wav files - we loaded them and they distort MORE than the 16-bit ones...

what do you mean by this?

The distortion probably comes from a conversion that has been done without dithering

What conversion?

[d.healey]

@Lindon Distortion with IRs is often due to a gain increase created by the IR. Can you send me some of the 24bit ones that cause issues for you?

[Lindon]

@d-healey - sure I will get him to send some of them over...thanks

[ustk]

@Lindon @d-healey's right, often the distortion doesn't come directly from the IR itself but for the convolution resulting in an over 0dB signal. Although a simple gain after the convolution will tell the truth about this.

Sorry I just misunderstood this:

these have reduced when we went from 24-bit IRs to 16-bit IRs

You said the distortions reduced from 24 to 16bits, but I heard the files have been reduced. My bad :)

When does the distortion happen? In the early reflections/transient only? On the whole file? The late tail only?

[Lindon]

@ustk said in IR formats....:

@Lindon @d-healey's right, often the distortion doesn't come directly from the IR itself but for the convolution resulting in an over 0dB signal. Although a simple gain after the convolution will tell the truth about this.

Sorry I just misunderstood this:

these have reduced when we went from 24-bit IRs to 16-bit IRs

You said the distortions reduced from 24 to 16bits, but I heard the files have been reduced. My bad :)

When does the distortion happen? In the early reflections/transient only? On the whole file? The late tail only?

Well quoting the audio developer:

"The easy way to try it.. is run a sine wave. (Play low end like you would a sine bass) and you can hear all the harmonic distortion. - sounds like a waveshaper has been added into the IR engine...

Then for some reason, in Hise it adds a 19K spike of 12DB gain.. - although good luck hearing this"

[ustk]

@Lindon Hmm... Interesting...
Does it happen with IRs from another online bank for instance?

[Lindon]

@ustk said in IR formats....:

@Lindon Hmm... Interesting...
Does it happen with IRs from another online bank for instance?

Not sure - but the very same IRs when used in other convolution reverbs sound fine.....

[d.healey]

@Lindon I'm not hearing any distortion when I use those IRs and a sine-wave gen. I did have to turn the wet down a bit with some of them to prevent clipping.

Do you have a couple of audio examples of what you're hearing in HISE (with distortion) and what you're hearing with another convo that doesn't have distortion? This way I'll have a better idea of what I should be listening for. It would be good if both demos are created with a sine gen so we can compare more easily.

[Lindon]

@d-healey said in IR formats....:

@Lindon I'm not hearing any distortion when I use those IRs and a sine-wave gen. I did have to turn the wet down a bit with some of them to prevent clipping.
Do you have a couple of audio examples of what you're hearing in HISE (with distortion) and what you're hearing with another convo that doesn't have distortion? This way I'll have a better idea of what I should be listening for. It would be good if both demos are created with a sine gen so we can compare more easily.

• I will ask him.