OT throughput mixer audio quality?

nfim · 2016-09-14T17:04:34.938Z

Come back! We miss your knowledge and awesome vid tutorials!

secretmusic · 2016-09-14T18:33:38.350Z

no worries, i was referring to this thread, where people are telling each other to f*uck off without holding back. So this thread is a perfect example, in fact, of exactly what i’m saying. Anyways, this is not the point of this thread, and I personally would rather stay on topic. Thank you for pointing out that posts can be flagged, i was not aware of that and will make good use of that feature, if necessary

secretmusic · 2016-09-14T18:35:40.762Z

Ha thank you, i miss the exchanges too ! I’m setting up a studio in Berlin at the moment, once it’s all up and running, I will get started on the videos again, it’s been too long Cheers !

Stickhit · 2016-09-14T18:45:25.587Z

Technically speaking differentiating the signal from a Volca and a Voyager does not really stand up because the OT can only accept analogue signals and the output of the Volca is analogue.
Whatever limitation the OT may have with regard to fidelity will affect any signal fed into the OT. Obviously if the limitation only affects a specific frequency range a signal that does not include that specific range will not be affected.

josker · 2016-09-14T18:46:09.310Z

I too think that the place is very different from what it was a while ago. And yeah, your tutorials are missed

But as for the sound quality – am I very wrong in thinking that a knowledgeable person could very easily verify the amount of changes the OT’s AD/DA conversion inflicts on the sound? I often enjoy arguing over matters of opinion, but to me this doesn’t seem like one.

I mean, record a digital sample through the AD/DA of an OT and some other revered box, analyze the results. If I were savvy enough to do an objective, error-free A/B test – OT versus a(nother) set of high-end converters – I’d do it myself.

avantronica · 2016-09-14T19:09:26.733Z

secretmusic:

Thank you for pointing out that posts can be flagged, i was not aware of that and will make good use of that feature, if necessary

Okay - I see you flagged a post from 20months ago - as i mentioned, that’s the user that had left (dramatically), had since returned, had further discussions with the current mods concerning language etc - to be fair, we can’t go back through the years of postings (nor know what contemporaneous Moderation happened), but we can take down anything obviously offensive that wasn’t swept up and deal with any current postings

Things are different now we have migrated to a better platform for Elektronauts 2.0, the more active Moderation isn’t for all, but we do our best and we represent a broad range of views and try to be balanced and keep things genial, positive and on topic

nfim · 2016-09-14T19:09:50.273Z

We might as well. I’m happy to do some tests but my only interface other than the OT is a focusrite saffire 24, clean but not really pro-grade.

Stickhit, I was just thinking the same thing. Probably folks just care more about preserving the signal quality of something like a voyager or tempest more than volcas, which are potentially providing less ‘crucial’ elements of the track.

Secretmusic, keep in mind all the bickering in this thread was posted over a year ago and lots has changed since then.

stutech · 2016-09-14T22:23:59.989Z

Good point. Isn’t the OT recording @ 44.1kHz? I’d imagine a Moog Voyager to produce frequencies way above 22kHz which, while not being “heard” that much, can change our perception of the sounds.

Stickhit · 2016-09-15T11:21:26.864Z

There are many things that can affect our perception of sound (e.g. visual stimulus, age, health, mood, fatigue, personal biases etc.). I suspect that frequencies outside the human audio range are the least likely to affect sound perception, though they may upset your cat.

stutech · 2016-09-15T11:25:53.128Z

I respectfully disagree. Human hearing doesn’t just cut off @ 20k, it gradually rolls off (also the exact cutoff point and slope vary from person to person). Depending on the bandwidth and implementation of the filters in a converter, 44kHz can sound somewhat “smeared” compared to even 48kHz.

secretmusic · 2016-09-15T12:39:04.372Z

Hi ! You’re right, and this is what i meant. The volca is just as much an analog signal before it hits the OT, however, its frequency range is different, it lacks the massive present low end of the Voyager, and complex subharmonics. I’ve found that the OT will fare better with that kind of signal (almost bandpassed) than with full range, complex signals. Hope this makes it clearer

secretmusic · 2016-09-15T12:46:12.895Z

Hi Josker !
Yes you’re absolutely right. However, you’re forgetting one vital component in the A/B process, and this is why I always make a point in reminding people who think that this would settle anything : the OT has no way to ensure proper gain staging.
There are no meters, except from a LED that goes from green to red (!?)

So, there is no way to correctly ensure that we’re hitting the converters at the “proper” level (whatever that may be )
Also, there are a few more stages of gain on the playback chain, from sample level to track level to Master level. Which combination of those levels ensures limiting free playback of the sample ? We don’t know, and quite frankly, without Elektron’s insight (which they won’t give), there is no way to know.

Without clear and repeatable gain staging through metering, any A/B test is futile. It leaves too much to the ear, feelings, and user “error”.

Cheers !!

secretmusic · 2016-09-15T13:10:50.723Z

Hi ! Apologies again, i must admit that I didn’t check the date of the post I flagged !
Appreciate the help

secretmusic · 2016-09-15T13:13:18.654Z

Precisely ! Some instruments have a more intricate, delicate and wide ranging signal than others. Such signals benefit greatly from hi - end conversion, which the OT is not quite suited for, if only because of its lack of proper metering Cheers !

Stickhit · 2016-09-15T14:00:22.930Z

You are correct, human hearing does not just cut off at specific upper and lower frequencies and the cut off points and associated roll off slopes do indeed vary from person to person. However, this does not alter the fact that there are audio frequencies which you have never been able to hear and there are audio frequencies which you will no longer be able to hear as you get older.
The point I was trying to make in my initial post was that there are other things which I believe are more likely to affect your sound perception, on a day to day basis, than frequencies at the edge of your audible hearing range.

bolandross · 2016-09-15T14:42:28.266Z

I assert, that in a blind test, nobody would be able to distinguish a signal that went through the Octatrack from a signal that did not.

(using proper gain staging, since driving a converter too hot or digitally clipping a signal will -of course- be audible)

In other words: If you do it right, you won’t hear any “quality loss”.

By the way: A great song will still sound great, even after capturing it with a 8 bit sampler at 11khz … but that’s not what this discussion here is about.

Best regards,
bolandross

josker · 2016-09-15T14:47:47.520Z

Heh, well put.

I try to ignore things I can’t at all hear.

But yes, this is purely out of curiosity

Stickhit · 2016-09-15T15:10:16.975Z

A null test would be more accurate, takes the human being out of the equation

JuanSOLO · 2016-09-15T15:18:29.334Z

When I had a Tempest, I had it plugged into the OT for a long while, one day I decided to bypass the OT, and I was like “WOW, that sounds much better, so full and rich”
I got curious and did the same with my SlimPhatty, same reaction really.
For a while I got wacky obsessed about it, and it would bother me that I was loosing something.
Then I realized that I enjoy crushing my music with effects more than I like a super clean sound.
Haven’t looked back since.
All things flow through the OT.

LyingDalai · 2016-09-15T15:37:00.195Z

Still, have you tried to spend some time to get the cleanest sound from your gear plugged in OT ?

There are many way to change the gain, each must affect the incoming sound in a way… Correct me if I’m wrong :

input gain : I would think this guy should be brought as high as possible until the led is yellowing for the highest volume (I would even lower it a bit)
vol input of the thru track
amp volume
track level

I would expect VOL to affect the sound less, so I would use this one to get a proper volume.
Track level would be used only for lowering the sound temporarily, like for slowly muting the track, I guess.

Another way to get some volume up is using FX, but either COMP GAIN or FILTER DRIVE would alter the signal.

Best way to iron such thing out would be with a synth with stereo output, I guess… One direct in the mixer, the other in the OT.

Even if OT has not the best A/D converters in the universe, I feel like it’s important to identify the best way to handle the gain staging.