It’s a static fixed (or very slowly varying) offset summed with the alternating audio signal, so that the latter isn’t centered on 0. The consequence will be to reduce the headroom on which ever side of 0 the offset is.

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MW thread in which os acknowledges that you need a highpass filter when using ES-6.
https://www.muffwiggler.com/forum/viewtopic.php?t=144271&sid=e565fb625bcd605038110bf9d26452ea

Can you let me know if I’m one of the DC offset offenders? I’m working with a new-ish recording setup and want to get it right :slight_smile:

Also, please let us know how you’re seeing this problem. This is the kind of thing I’d like to be able to catch when people submit samples/tracks so that I can help them fix it right away.

Yep, found that thread earlier today after reading @simeon’s post. I’d noticed the offset, but hadn’t figured out why it might be a problem.

When you say you noticed it, what drew your attention to it?

Even when there’s nothing plugged into the inputs on the ES-6, the ADAT channels look like this in RME’s TotalMix:
totalmix

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I always wondered what the cause of that was. For me, on a couple of channels, it’s so severe that it is quite audible. I figured that I simply had a defective ES-6. Good to know!

I’ve noticed a lot of offset when recording through my ES8. I need to pay more attention to the culprits. It’s not an issue for me as I record then sequence, but I guess it would be if I ever did anything live.

Here’s a nice example if anyone is not sure what to look for:

!!!

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ha, DC offset problems actually reared their head in the not-so-modular bit of my setup while I was doing my track. Thought I had a bust compressor channel on my rackmount unit but realised the problem was specific to my mfb522 drum machine’s inst outputs… guessed it must be DC offset… Just chucked a meter on there - sure enough 6V DC - yikes!

Feel like some special patch cables with built-in 1uF polyester decoupling caps might be in order - gotta be some advantages to a whole setup on 1/4" jacks!

I found the ES3/ES6 inputs/outputs themselves don’t have perfect DC offset correction when I had time on this gear. I was correcting it digitally by inserting trivial DSP programs. Either by measuring ADC output with shorted input & subtracting, or a single-pole highpass. Dunno if this is as easy to do outside of linux/jack though…

I’ve got a recording process sorted now with Live, so can just stick a HP on each input. Not really a problem.

So do the output modules mentioned by @Simeon earlier - Rosie etc have this built in to them? What about eurorack mixers?

Notes for my track Skylore:

This track was written in a Stockholm hotel room, looking out just before sunset and one of those beautiful skies that are just pure graduated colours. I don’t have a picture - but really it’s the effect of the winter light that made this. There’s also something in the short days that enhances this, or at least changes your perception of it. So the track tries to capture this depth.

The track is synthesised entirely in Max, and is then mixed in Live. I’ve been a bit obsessed by this gen~ rungler patch posted on the C74 forums a while back: https://cycling74.com/forums/sharing-is-rungling-stepped-havoc-in-gen, and have spent a bit of time tinkering with the arrangement inside along with building a control system around it. This is the current setup, with outputs from each of the runglers, plus phasor outputs driving a slave set of wave~ oscillators, then a whole bunch of other oscillators modulating amplitude - from lfo to audio range, with others modulating frequency (rect~'s at the top). Filtering is handled by the wonderful Surreal Machines Sallen & Key filter, and reverb by the Beap Gigaverb.

The thing I’ve noticed about this patch is that at very low rungle amounts (If that is the correct term?) the sound is more like a chorus rather than chaotic pattern. This is what you hear in the song. Another area I’m exploring is this approach of many free running modulating oscillators that feels very modular.

Hope you enjoy it.

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Hey everyone,

Popped in after a weekend away in London to answer everyone’s DC offset queries, and it looks like everyone has been really helpful and offered a lot of solutions. What a great community!

Most DAWs should have an option to remove DC offset - in Logic it’s under track options.

In Ableton, add the “utility” effect to any channel and click the DC button. This also works relatively well on incoming signals, so if you monitor post effects you can send better signals to your speakers.

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Any work on a release date? No rush, just curious.

solstice is the 21st right?

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Don’t really want to speak for @Simeon but I think he’s going to try to wrap mastering up this weekend. If he can leave me Sunday for Bandcamp/Kunaki setup, I may have it published on Sunday the 17th. That way people might be able to get it shipped to them by solstice.

Sorry, lots of ifs and maybes.

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Just delivered the mastered files.

Less ifs and maybes every day.

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Published! CD orders are open, just click through to bandcamp. Thanks so much to everyone who participated, and special thanks to @Simeon for mastering and @kelli_cain for photography.

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Hooray! Thanks for all the hard work getting this out.

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Super excited to be a part of this, thanks everyone! This is also the first time I’ve heard something I made mastered, thanks a ton @Simeon, and triple thanks @jasonw22 for organizing!

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