ImpOscar2 Sine wave aliasing?

[JoeLowery215]

I was Comparing the harmonic/additive section of Imposcar2 vs ImpOscar3 and noticed that the Sine waves in Imposcar2 had this aliasing that would change as you increased the volume of the harmonic, and then turn into the normal distortion.

What’s going on here? The new version doesn’t have this.

[DrGonzo]

Write to Gforce about it. They have great support with deep knowledge.

[JoeLowery215]

Write to Gforce about it. They have great support with deep knowledge.

Thanks will do!

[poonna]

I'm not sure, but isn't this to be expected? I think the original OSCar has digital oscillators. If so, aliasing might be a natural byproduct (and its character) if the sine isn't pure. If it's gone in impOSCar 3, probably they might think people didn't really want it so they kinda fixed it (so many if's here, as I'm just speculating).

[zerocrossing]

I'm not sure, but isn't this to be expected? I think the original OSCar has digital oscillators. If so, aliasing might be a natural byproduct (and its character) if the sine isn't pure. If it's gone in impOSCar 3, probably they might think people didn't really want it so they kinda fixed it (so many if's here, as I'm just speculating).

This sounds right to me. The OSCar was 8 bit with an analog filter, and the charm was the artifacts. If there's a bug, it's that impOSCar 3 has a clean sine wave.

One bug I reported but was never fixed to my knowledge is that the conversion from v2 to v3 custom additive ways don't translate and v3 sounds a lot duller. They're missing a lot of the partials. You can manually reconstruct them by ear, but I wish they were just correct.

[DrGonzo]

This sounds right to me. The OSCar was 8 bit with an analog oscillator, and the charm was the artifacts. If there's a bug, it's that impOSCar 3 has a clean sine wave.

One bug I reported but was never fixed to my knowledge is that the conversion from v2 to v3 custom additive ways don't translate and v3 sounds a lot duller. They're missing a lot of the partials. You can manually reconstruct them by ear, but I wish they were just correct.

Vintage plugins sounds the best.

[seafire]

I'm not sure, but isn't this to be expected? I think the original OSCar has digital oscillators. If so, aliasing might be a natural byproduct (and its character) if the sine isn't pure. If it's gone in impOSCar 3, probably they might think people didn't really want it so they kinda fixed it (so many if's here, as I'm just speculating).

This sounds right to me. The OSCar was 8 bit with an analog oscillator

Digital Osc

[El°HYM]

Most definitely digital osc (with analog filter). Maybe he is referring to the a bit odd design of the oscillators, which in the end still run into an 8 bit DAC.

[zerocrossing]

I'm not sure, but isn't this to be expected? I think the original OSCar has digital oscillators. If so, aliasing might be a natural byproduct (and its character) if the sine isn't pure. If it's gone in impOSCar 3, probably they might think people didn't really want it so they kinda fixed it (so many if's here, as I'm just speculating).

This sounds right to me. The OSCar was 8 bit with an analog oscillator

Digital Osc

Oops, I meant analog filter.

[JoeLowery215]

I'm not sure, but isn't this to be expected? I think the original OSCar has digital oscillators. If so, aliasing might be a natural byproduct (and its character) if the sine isn't pure. If it's gone in impOSCar 3, probably they might think people didn't really want it so they kinda fixed it (so many if's here, as I'm just speculating).

This sounds right to me. The OSCar was 8 bit with an analog filter, and the charm was the artifacts. If there's a bug, it's that impOSCar 3 has a clean sine wave.

One bug I reported but was never fixed to my knowledge is that the conversion from v2 to v3 custom additive ways don't translate and v3 sounds a lot duller. They're missing a lot of the partials. You can manually reconstruct them by ear, but I wish they were just correct.

If that's the case, then it's definitely because the Sine waves don't have that hi-end aliasing information then. The aliasing is 100% not there in impOSCar3 but is there in impOSCar2.

I thought I was losing my mind because the aliasing is such an important feature for that specific sound, but I'm not even sure the actual synth has aliasing with the Sine waves.

[JoeLowery215]

Most definitely digital osc (with analog filter). Maybe he is referring to the a bit odd design of the oscillators, which in the end still run into an 8 bit DAC.

Thanks, I always get confused because the Synclaiver had quantization on the sine waves too because of the low bit rate, but the Sample rate was high. Which I never understood why the sample rate would be so high but the bit rate so low.

I guess what I'm hearing in ImpOscar2 is quantization noise then?

[JoeLowery215]

Oh I also wanted to note there sounds like if you bring down all the sine wavs to zero, there's still a low square wave playing in impOscar2, but not in impOscar3.